Freecom LTO-4 Host interface guide

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HP LTO Ultrium tape drives technical reference manual

Volume 3: Host interface guide

LTO 4 drives

Edition 1, June 2007

HP restricted

Page 2

Legal and notice information

Hewlett-Packard Company makes no warranty of any kind with regard to this material, including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose. Hewlett-Packard shall not be liable for errors contained herein or for incidental or consequential damages in connection with the furnishing, performance, or use of this material.

This document contains proprietary information, which is protected by copyright. No part of this document may be photocopied, reproduced, or translated into another language without the prior written consent of Hewlett-Packard. The information is provided “as is” without warranty of any kind and is subject to change without notice. The only warranties for HP products and services are set forth in the express warranty statements accompanying such products and services. Nothing herein should be construed as constituting an additional warranty. HP shall not be liable for technical or editorial errors or omissions contained herein.

Printing history

Version Edition Date Changes

LTO 4 Edition 1 June 2007 LTO4 FC, SCSI and SAS version

This document is frequently revised and updated. To find out if there is a later version, please ask your HP OEM Representative.

HP LTO Ultrium 4 tape drives technical reference manual, volume 3: host interface guide

HP restricted

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The purpose of this manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Related documents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Documents specific to HP LTO Ultrium drives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Documentation map. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Drives—general . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Installation and configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Cartridges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Maintenance and troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Dealing with errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

LTO Ultrium features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

General documents and standardization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

1 Interface Implementation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

The Fibre Channel interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Supported task management functions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

The SCSI interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Supported messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

The SAS interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Supported task management functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Supported commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

SCSI features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Design approach. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Power-on . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Reset strategy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Abort handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

LUN identification (SCSI only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Bus parity or CRC errors (SCSI only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Disconnect strategy (SCSI only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Link error handling (SAS drives). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Multi-initiator support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Fibre Channel operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Fibre Channel addressing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Names . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Addresses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

HP’s implementation of names and addresses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Implications for libraries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Field replaceable units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

CD-ROM emulation (SCSI and SAS drives only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

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2 Messages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Message Out support (SCSI only). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Message In support (SCSI only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Extended Message support (SCSI only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

3 Response frames and task management functions . . . . . . . . . . . . . . . . . . . . . . . 33

Response frames . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Task management functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

4 Commands—introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Summary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Command details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Pre-execution checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Bad LUN check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Deferred Error check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Diagnostic Status check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Fixed Bit check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Flag Link check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Illegal Command check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Illegal Field/Request check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Media Access check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Media Information check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Media Write check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Parameter List check. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Reservation check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Unit Attention check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Command descriptor block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

5 Commands. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Enhanced FIRMWARE UPGRADE DOWNLOAD FIRMWARE SEGMENT . . . . . . . . . . . . A4h (1Fh) 44

Enhanced FIRMWARE UPGRADE REBOOT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A4h (1Fh) 46

Enhanced FIRMWARE UPGRADE REPORT IMAGE INFO . . . . . . . . . . . . . . . . . . . . . . . A3h (1Fh) 47

ERASE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19h 49

INQUIRY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12h 50

INQUIRY data pages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Vital Product Data pages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

Supported Vital Product Data Pages page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

Unit Serial Number page. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

Device Identification page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

Defined identifiers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

Management Network Address VPD page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

Extended INQUIRY Data VPD page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

Mode Page Policy VPD page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

SCSI Ports VPD page. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

Sequential Access Device Capabilities page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

Manufacturer-assigned Serial Number page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

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TapeAlert Supported Flags page. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

Drive Component Revision Levels pages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

LOAD/UNLOAD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1Bh 68

LOCATE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2Bh/92h 71

LOG SELECT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4Ch 73

LOG SENSE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4Dh 75

Log page format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

Supported Log Pages page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

Write Error Counters log page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

Read Error Counters log page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

Sequential Access Device log page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

Temperature log page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

DTD Status log page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

Very high frequency data (VHF) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

Very high frequency polling delay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81

DTD primary port status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

TapeAlert Response log page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

Requested Recovery log page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85

Recovery procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85

Protocol-Specific Log page (SAS drives only). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85

TapeAlert log page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87

Tape Usage log page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

Tape Capacity log page. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

Data Compression log page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

Device Wellness Log page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90

Performance Data log page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91

Device Status log page. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91

MODE SELECT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15h/55h 93

Mode parameter pages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94

Mode page representation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94

Mode data format. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95

Mode block descriptor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97

Read-Write Error Recovery mode page. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98

Disconnect-Reconnect page. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99

FC drives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99

SCSI drives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100

SAS drives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101

Control mode page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102

Control Extension sub-page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103

Data Compression Characteristics page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103

Device Configuration page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104

Medium Partitions mode page. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106

Protocol-Specific Logical Unit mode page (FC drives) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107

Protocol-Specific Logical Unit mode page (SCSI drives) . . . . . . . . . . . . . . . . . . . . . . . . . . . 108

Protocol-Specific Logical Unit mode page (SAS drives) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108

Protocol-Specific Port mode page (FC drives). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108

Protocol-Specific Port mode page (SCSI drives) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112

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Sub-pages (SCSI drives). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112

Protocol-Specific Port mode page (SAS drives) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116

PHY Control and Discover sub-page (SAS drives only). . . . . . . . . . . . . . . . . . . . . . . . . . 117

Power Condition mode page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119

Information Exceptions mode page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120

Medium Configuration mode page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121

Serial Number Override vendor-unique mode page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122

Device Time mode page. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123

Extended Reset vendor-unique mode page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125

CD-ROM Emulation/Disaster Recovery mode page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126

MODE SENSE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1Ah/5Ah 128

PERSISTENT RESERVE IN. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5Eh 130

PERSISTENT RESERVE OUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5Fh 134

Additional parameter data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137

Parameter data for the Register and Move service action . . . . . . . . . . . . . . . . . . . . . . . . 137

Transport IDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138

PREVENT/ALLOW MEDIUM REMOVAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1Eh 140

READ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 08h 141

READ 6 (CD-ROM mode). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 08h 145

READ 10 (CD-ROM mode). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28h 146

READ ATTRIBUTE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8Ch 147

MAM attribute data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150

Attribute ID values. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151

Standard device type attributes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151

Standard medium type attributes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153

Standard host type attributes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 154

Vendor-unique medium type attributes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155

Text localization indentifiers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155

READ BLOCK LIMITS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .05h 157

READ BUFFER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3Ch 158

READ CAPACITY (CD-ROM mode) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25h 161

Read Capacity data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 161

READ LOGGED-IN HOST TABLE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A3h (1Fh) 162

READ MEDIA SERIAL NUMBER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ABh (01h) 164

READ POSITION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34h 166

READ TOC (CD-ROM mode) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43h 169

Read TOC data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 169

RECEIVE DIAGNOSTICS RESULTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1Ch 171

RELEASE UNIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17h/57h 173

REPORT DENSITY SUPPORT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44h 175

REPORT DEVICE IDENTIFIER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A3h (05h) 179

REPORT LUNS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A0h 180

REPORT SUPPORTED OPCODES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A0h (0Ch) 182

REPORT SUPPORTED TASK MANAGEMENT FUNCTIONS

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A3h (0Dh) 184

REPORT TARGET PORT GROUPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A3h 186

Data returned. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 186

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REQUEST SENSE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .03h 189

Request Sense data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 190

Fixed format. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 190

Descriptor format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 193

Sense data management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 195

Current sense . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 195

UNIT ATTENTION sense . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 196

DEFERRED ERROR sense . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 197

Sense keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 198

Additional Sense codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 199

Error codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 206

RESERVE UNIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16h/56h 207

REWIND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .01h 209

Vendor-unique ENABLE TRANSPORT LAYER RETRIES (SAS drives only) . . . . . . . . . . . . . . . C2h 210

SECURITY PROTOCOL IN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A2h 211

Returned data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 211

SECURITY PROTOCOL OUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B5h 218

Returned data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 218

SEEK (CD-ROM mode) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2Bh 223

SEND DIAGNOSTIC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1Dh 224

Standard self-test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 225

SET CAPACITY. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0Bh 226

SET DEVICE IDENTIFIER. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A4h (06h) 228

SPACE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11h/91h 229

START/STOP (CD-ROM mode) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1Bh 232

TEST UNIT READY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .00h 233

VERIFY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13h 234

WRITE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0Ah 235

WRITE ATTRIBUTE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8Dh 237

WRITE BUFFER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3Bh 240

WRITE FILEMARKS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10h 243

Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 245

Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 247

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The purpose of this manual

This is one of five volumes that document HP LTO Ultrium drives. This volume provides host interface information for the following products:

• HP LTO Ultrium 4 Full-Height FC Internal Drive

• HP LTO Ultrium 4 Full-Height SCSI Internal Drive

• HP LTO Ultrium 4 Full-Height SAS Internal Drive

1 Interface Implementation

HP LTO Ultrium drives use Fibre Channel, parallel SCSI or Serial Attached SCSI (SAS) as the interface to connect to the host system.

This chapter gives an overview of how the interface operates. Full details of the messages are given in Chapter 2, of SAS response frames and task management functions in Chapter 3, and of commands in Chapter 4 and Chapter 5.

The Fibre Channel interface

Fibre Channel is an industry standard, approved by the American National Standards Institute (ANSI). You are recommended to read the ANSI standard documents in conjunction with this manual. The ANSI specifications define the interface in general while this document describes the HP LTO Ultrium implementation.

The Fibre Channel implementation provides a drive with a standard set of features and functions. These include the following:

• Implementation of all mandatory and most optional commands of the Sequential Access

command set

• 4 Gbps serial transfers with auto-negotiation to 2 Gbps and 1 Gbps speeds

• Dual port capability

• Conformance to the following SCSI standards:

•FC-PI ANSI INCITS 352-2002

• FC-FS ANSI INCITS 373-2003

• FC-FLA ANSI INCITS TR-20-1998

• FC-AL-2 ANSI INCITS 332-1999

• FCP-2 ANSI INCITS 350-2003

• FC-TAPE ANSI INCITS TR-24-1999

• In addition to the standards listed above the following generic SCSI standards apply.

• SAM-2 ANSI INCITS 366-2003

• SPI-4 ANSI INCITS 362-2002

• SPC-3 ANSI INCITS 408-2005

•SSC-2 ANSI INCITS 380-2003

Supported task management functions

The following task management functions are supported by the drives:

• ABORT TASK

• ABORT TASK SET

• CLEAR TASK SET

• LOGICAL UNIT RESET

• QUERY TASK

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For implementation details on these, see Chapter 3, “Response frames and task management

functions”.

The SCSI interface

The Small Computer System Interface (SCSI) is an industry standard, approved by the American National Standards Institute (ANSI). You are recommended to read the ANSI standard document in conjunction with this manual. The ANSI specification defines the interface in general while this document describes the HP LTO Ultrium implementation.

The SCSI implementation provides a drive with a standard set of features and functions. These include the following:

• Synchronous data transfers

• Asynchronous data transfers

• Implementation of all mandatory and most optional commands of the Sequential Access

command set

• LVD (Low-Voltage differential) SCSI connection

• Ultra-320 wide SCSI

• Conformance to the following SCSI standards:

• SAM-2 ANSI INCITS 366-2003

• SPI-4 ANSI INCITS 362-2002

• SPC-3 ANSI INCITS 408-2005

• SSC-2 ANSI INCITS 380-2003

Supported messages

The following messages are supported by the drives:

• ABORT

• BUS DEVICE RESET

• COMMAND COMPLETE

• DISCONNECT

• IDENTIFY

• IGNORE WIDE RESIDUE

• INITIATOR DETECTED ERROR

• MESSAGE PARITY ERROR

• MESSAGE REJECT

• NO-OP (no operation)

• PARALLEL PROTOCOL REQUEST (PPR)

• RESTORE POINTERS

• SAVE DATA POINTER

• Extended Message: PARALLEL PROTOCOL REQUEST

• SYNCHRONOUS DATA TRANSFER REQUEST

• WIDE DATA TRANSFER REQUEST

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For implementation details on these messages, see Chapter 2, “Messages”

The SAS interface

Serial Attached SCSI (SAS) is an industry standard, approved by the American National Standards Institute (ANSI). You are recommended to read the ANSI standard documents in conjunction with this manual. The ANSI specifications defines the interface in general while this document describes the HP LTO Ultrium implementation.

The SAS implementation provides a drive with a standard set of features and functions. These include the following:

• Implementation of all mandatory and most optional commands of the Sequential Access

command set

• SAS1.1 compliant interface

• 3 Gbps serial transfers

• Dual port capability

• Conformance to the following SCSI standards:

• SAM-2 ANSI INCITS 366-2003

• SAS1.1 T10/1601-D revision 10

• SPC-3 ANSI INCITS 408-2005

• SSC-2 ANSI INCITS 380-2003

Supported task management functions

The following task management functions are supported by the drives:

• ABORT TASK

• ABORT TASK SET

• CLEAR TASK SET

• LOGICAL UNIT RESET

• QUERY TASK

For implementation details on these, see Chapter 3, “Response frames and task management

functions”

Supported commands

The following commands are supported by the drives. They include all Mandatory and Extended commands and most Optional commands.

A4h (1Fh) Enh. A4h (1Fh) Enh. FW UPGRADE REBOOT 57h/17h RELEASE UNIT A3h (1Fh) Enh. FW UPGRADE REPORT IMAGE INFO 03h REQUEST SENSE

C2h ENABLE TLRS (SAS drives only) 44h REPORT DENSITY SUPPORT 19h ERASE A3h (05h) REPORT DEVICE IDENTIFIER 12h

FW UPGRADE DOWNLOAD FW SEGMENT 1Ch RECEIVE DIAGNOSTIC RESULTS

INQUIRY

A0h

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REPORT LUNS

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1Bh

2Bh/92h

4Ch

4Dh

15h/55h

1Ah/5Ah

5Eh 5Fh 1Eh 08h 08h 28h 8Ch 05h 3Ch 25h

A3h (1Fh)

ABh (01h)

34h 43h

LOAD/UNLOAD LOCATE (10/16) LOG SELECT

LOG SENSE MODE SELECT MODE SENSE PERSISTENT RESERVE IN PERSISTENT RESERVE OUT PREVENT/ALLOW MEDIUM REMOVAL READ READ 6 (CD-ROM mode) READ 10 (CD-ROM mode) READ ATTRIBUTE READ BLOCK LIMITS READ BUFFER READ CAPACITY (CD-ROM mode) READ LOGGED-IN HOST TABLE (FC and SAS only) READ MEDIA SERIAL NUMBER READ POSITION READ TOC (CD-ROM mode)

A3h (0Ch) A3h (0Ch) A3h (0Dh)

56h/16h

01h A2h B5h 2Bh 1Dh 0Bh

A4h (06h)

11h 91h 1Bh 00h 13h 0Ah 8Dh 3Bh 10h

REPORT TARGET PORT GROUPS REPORT SUPPORTED OP CODES REPORT SUPPORTED TASK

MNGMNT FUNCTNS RESERVE UNIT

REWIND SECURITY PROTOCOL IN SECURITY PROTOCOL OUT SEEK (CD-ROM mode) SEND DIAGNOSTIC SET CAPACITY SET DEVICE IDENTIFIER SPACE (6) SPACE (16) START/STOP UNIT (CD-ROM mode) TEST UNIT READY VERIFY WRITE WRITE ATTRIBUTE WRITE BUFFER WRITE FILEMARKS

For implementation details on these commands, see Chapter 4, “Commands—introduction” and

Chapter 5, “Commands”.

SCSI features

Design approach

The features supported by the drive are based on standards, both official and de facto. The drive is fully compliant with the current SCSI standards: SPC3, SSC2, SAM2, and the relevant transport protocol (such as SPI4 for SCSI drives, SAS1.1 for SAS drives). All mandatory commands and features are supported, as well as some that are optional. In addition, some features from older standards are still supported for backwards compatibility.

Power-on

The drive will respond to INQUIRY, TEST UNIT READY, REPORT LUNS and REQUEST SENSE commands within 250 ms of power on for SCSI and SAS drives. For FC drives, the response time depends on whether the drive is standalone or operating within a library. Standalone could take up to 3 seconds, and if the drive is in a library, there would be an additional library initialization time on top of this.

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The first command received from an initiator (other than INQUIRY, REQUEST SENSE and REPORT LUNS) will result in Once the drive has completed its self-test and set-up procedures, it will attempt to reload any tape that is already present in the drive. It may take some time to recover the tape, especially if it was positioned near EOM when power was cycled. During tape recovery, medium access commands will result in a sense key of becoming ready).

Reset strategy

The drive supports reset as follows:

• The current I/O process is aborted

• Any queued I/O processes from other initiators are removed

• SCSI drives only: All negotiated settings are cleared

• Mode parameters that do not relate to ADI and port enablement are cleared to their default

values

• Any reservations are cleared (but not persistent reservations)

• Any buffered writes are flushed to tape

• The logical position becomes undefined, unless Rewind-On-Reset has been configured in which

case the drive will rewind to BOM

• A

UNIT ATTENTION condition is set, based on the type of reset

CHECK CONDITION status, with UNIT ATTENTION sense data reported for the power on.

NOT READY, with additional sense of 0401h (drive in process of

SCSI drives will respond to 250 ms of the reset line being released. The first command from any initiator (other than

REQUEST SENSE and REPORT LUNS) will result in CHECK CONDITION status with UNIT ATTENTION

sense data for the reset.

NOTE: SCSI drives: All commands will receive BUSY status until the drive has completed its internal

reset.

The Reset button on the front panel and the ACI_RESET_L line on the Automation Controller Interface are both connected to the Power-Up Reset interrupt on the processor. The effect is equivalent to power-cycling the drive. The contents of the tape and cartridge memory may not be consistent after the action and any data in the drive buffer will be lost.

Abort handling

SCSI drives

If an abort condition is detected before a command phase completes, the bus is set to bus free and the command is not executed.

If an abort condition is detected between the end of the command phase and the start of the status phase, the bus is set to bus free and the processing below is carried out as listed in Table 1.

If an abort condition is detected during status phase, the bus is set to bus free.

INQUIRY, TEST UNIT READY, REPORT LUNS and REQUEST SENSE within

INQUIRY,

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If a command (other than INQUIRY for standard data or REQUEST SENSE) is received after the abort but before the drive is ready to process the command, the behavior depends on whether Disconnects are allowed.

• If disconnects are allowed, the drive will disconnect and wait until the abort processing has

completed before executing the command.

• For SCSI drives, if disconnects are not allowed, a

BUSY response will be returned.

All interfaces

If an abort condition is detected, it will be processed as listed in Table 1.

Table 1 Abort processing

Command Abort Processing ERASE Long erase is aborted as quickly as possible without corrupting the

tape format. Short erase completes.

INQUIRY None LOAD/UNLOAD Load completes and logically positions the tape at BOT.

Unload is aborted leaving the logical position at BOT unless the operation is past the “point of no return” in which case the tape is ejected.

LOCATE The logical position is set back to that at the start of the operation. LOG SELECT If data transfer is complete, the command is completed, otherwise

no action is taken

LOG SENSE None MODE SELECT If data transfer is complete, the command is completed, otherwise

no action is taken.

MODE SENSE None PREVENT/ALLOW

MEDIUM REMOVAL READ The logical position is set to that at the start of the operation. READ BLOCK LIMITS None READ BUFFER None READ POSITION None RECEIVE DIAGNOSTICS

RESULTS RELEASE UNIT The command completes. REQUEST SENSE Sense data is discarded. RESERVE UNIT The command completes. REWIND The command completes. SEND DIAGNOSTIC If data transfer is complete, the command is completed, otherwise

The command completes.

None

no action is taken

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Command Abort Processing SPACE The logical position is set back to that at the start of the operation. TEST UNIT READY None WRITE The logical position is set back to that at the start of the operation. WRITE BUFFER If data transfer is complete, the command is completed, otherwise

no action is taken.

WRITE FILEMARKS The logical position is set back to that at the start of the operation VERIFY The logical position is set back to that at the start of the operation

LUN identification (SCSI only)

Identify messages are used to identify the LUN being addressed by the initiator, and to identify which LUN is reselecting the initiator. The old LUN field in the CDB from the SCSI-2 standards is obsolete and should not be used (set to 0).

Bus parity or CRC errors (SCSI only)

If the drive detects a bus parity error in a message out or command phase, it will still accept the command, which will then return Detection of a parity error during the data out phase also causes the drive to return

CONDITION

mode or 4700h if not.

If Information Units is enabled (SCSI only), the drive will drop the bus on detecting a CRC error during a LQ_IU. If the CRC error occurs during the Information Units command phase or data out phase, the drive will return (Information Unit CRC error detected).

. Additional sense is set to 4701h (data phase CRC error detected) if the bus is in DT

CHECK CONDITION. Additional sense is 4700h (SCSI parity error).

CHECK CONDITION with a CRC error. Additional sense is set to 4703h

CHECK

On detecting an Initiator Detected error, the drive will return sense of 4800h (initiator detected error message received). The exception is when Information Units mode is enabled (SCSI only), when one of the following occurs:

• If an IDE message is received during a LQ_IU, the drive drops the bus and retries the LQ_IU pair.

• If the message is received during Status IU, the drive retries the LQ_Status pair.

• If the message is received during Data IU, the drive sends a LQ_Status with

and additional sense of 4800h.

Disconnect strategy (SCSI only)

The disconnect strategy used by the drive is based on maximizing the use of the bus for large sequential data transfers from a large data buffer. The drive will disconnect whenever it believes that it will provide better bus use. This may be between command and data phases, between bursts of data or before sending status. However, the drive will guarantee that it sends the configured maximum burst size or the remaining data in the transfer in any single data phase burst if the maximum burst size has been set to a value other than zero.

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CHECK CONDITION with additional

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The following diagram gives an overview of the drive’s disconnect strategy:

CDB arrives

Yes

REQUEST SENSE from

an initiator in CA or

INQUIRY with EVPD=0

Disconnect

priv granted

Yes

DisconnectSend data

Reselect

Data transfer

required?

Yes

ReselectExecute cmd

Transfer data &

execute cmd

Previous cmd

still in progress?

Yes

Send status

Cmd complete

Send status

Cmd complete

Link error handling (SAS drives)

In normal operation, random errors will occasionally be encountered on the link between the initiator and the tape drive. A single bit error may result in a frame with a bad CRC value, or in a communication failure if the error corrupts one of the special “primitive” messages used to manage the link. The SAS standard provides an optional mechanism to retry most link errors; this mechanism is known as Transport Layer Retries. See ”Protocol-Specific Logical Unit mode page (SAS drives)” on

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Send BUSY

status

Cmd complete

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page 108. By default the tape drive has retries disabled; an initiator which is also capable of handling retries must enable them in the tape drive typically during the discovery phase.

The following table indicates the drive behavior both with and without transport layer retries enabled, for a variety of possible error scenarios:

Error Type Behavior

Transport Layer Retries Disabled Transport Layer Retries Enabled

Data frame CRC error on writes

The drive sends NAK. The initiator aborts the command using the ABORT task management functions.

The drive sends NAK. The initiator restarts data transfer with the Changing Data Ptr bit set for the first resent frame.

Data frame CRC error on reads

The initiator sends NAK. The drive aborts the command with a sense key of

ABORTED COMMAND and

additional sense of 4B04h (NAK

The initiator sends NAK, drive restarts transfer from start of burst with Changing Data Ptr bit set for 1st resent frame

received).

XFER_RDY frame CRC error

The initiator sends NAK. The drive aborts the command with a sense key of

ABORTED COMMAND and

additional sense of 4B04h (NAK

The initiator sends NAK. The drive re-issues

XFER_RDY

with the Retransmit bit set and a fresh TPTT value.

received).

Response frame CRC error

The initiator sends NAK. The drive re-sends the response frame with the Retransmit bit set

The initiator sends NAK. The drive re-sends the response frame with the Retransmit bit set.

Loss of ACK for a write data frame

Loss of ACK for read data frame

The initiator times out the operation and sends an

ABORT task management

function.

The drive times out the operation and aborts the command with a sense key of

ABORTED COMMAND and

additional sense of 4B03 (ACK/NAK Timeout).

The drive completes the operation (since all data was received successfully) and sends

GOOD status.

The drive times out the operation, then restarts the transfer from the start of the burst with the Changing Data Ptr bit set for the first resent frame.

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Error Type Behavior

Loss of ACK for a

XFER_RDY frame

Loss of ACK for a response frame

Multi-initiator support

All drives are design to operate within a multi-initiator environment. The maximum number of concurrently connected initiators is:

• FC drives: 255, shared across both ports

• SCSI drives: 15

• SAS drives: 32, shared across both ports

Sense Data, Unit Attention and Deferred Errors are maintained for each initiator. Mode Parameters are common to all initiators.

The untagged queuing model implemented by the drives guarantees that all commands are executed in strict order of receipt. Certain non-media access type commands, such as

READY

, INQUIRY, REQUEST SENSE and REPORT LUNS, are implicitly allowed to queue-jump other

media access type commands, such as

Transport Layer Retries Disabled Transport Layer Retries Enabled

The drive times out the operation and aborts the command with a sense key of

ABORTED COMMAND and

additional sense of 4B03 (ACK/NAK Timeout).

The drive times out the operation, then re-sends the response frame with the Retransmit bit set.

REWIND.

The drive times out the operation, then re-issues

XFER_RDY with the Retransmit bit

set and a fresh TPTT value.

The drive times out the operation, then re-sends the response frame with the Retransmit bit set.

TEST UNIT

The SCSI drive supports the full command queuing model with a queue depth of 1 (SCSI drives, necessary for connectivity purposes) or 4 (FC drives). See “Standard Inquiry Data format (LUN0)”

on page 51 for details of the BQue and CmdQue bits which define this support.

Fibre Channel operation

The following sections have information specific to Fibre Channel operation:

• “Protocol-Specific Logical Unit mode page (FC drives)” on page 107

• “Protocol-Specific Port mode page (FC drives)” on page 108

• “Vital Product Data pages” on page 55

Fibre Channel addressing

Before describing HP’s implementation of Fibre Channel addressing, the concepts of Names and Addresses need to be clarified.

Names

Names are 64-bit identifiers assigned permanently to the tape drive during manufacture. They are commonly referred to as World Wide Names since they must be guaranteed unique. The names are

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typically used for identifying the device to operating systems, since addresses are assigned dynamically. One of the principal uses for WWNs in Storage Area Networks is to enable the division of fabrics into separate zones for security, load balancing, redundancy or manageability purposes.

There are at least eight different name formats distinguished by the Network Address Authority (NAA). Only one is used on HP LTO Ultrium drives. This is the IEEE Registered Name (NNA=5) and has the following format:

word 1

word 2

This name is made up of three fields:

• NAA Identifier (4 bits). “5” indicates a IEEE Registered Name.

• IEEE Company ID (24 bits). Assigned by IEEE to the company.

• Vendor Specified ID (36 bits). Assigned by the company.

Addresses

Each Fibre Channel port also has a Port Address which is assigned during loop initialization and/or Fabric Login. This is a 24-bit value in the following format:

23 16

The AL_PA is the Arbitrated Loop Physical Address. This is normally assigned dynamically during loop initialization.

If the drive is on a loop that is not attached to a fabric (in other words, when it is on a private link), the top two bytes will be zero. If the loop is attached to a fabric, the top two bytes are assigned when it logs into the fabric.

byte 0

NAA=5

byte 1 byte 2 byte 3

23 16

IEEE Company ID (24 bits)

Vendor Specified ID (36 bits)

byte 1 byte 2 byte 3

Domain

Addess

Area

Addess

Port or AL_PA

Addess

VSID

Together, the three bytes provide a unique address on the Fibre Channel fabric that is used for frame addressing. It forms the equivalent of the Target ID or Initiator ID in SCSI.

HP’s implementation of names and addresses

The HP implementation uses three adjacent IEEE Registered Names:

• The first (last bits = 00) is used as the Port A World Wide Name.

• The second (last bits = 01) is used as the Port B World Wide Name.

• The third name (last bits = 10) is used for the Device World Wide Name.

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(These are assigned during manufacture from HP’s pool of names, although only the first will actually be stored in the drive NV-RAM).

Port A

IEEE Registered Name (last bits = 00) Port Address A

Port B

IEEE Registered Name (last bits = 01) Port Address B

On LTO 4 drives there are two further WWNs, the SCSI Device WWN (typically set equal to the Node WWN) and the ADC Device WWN (last bits = 11)

The values of the names can be obtained using the Device Identification Vital Product Information Page (part of the

Implications for libraries

• Normally a standalone drive will operate using its own factory-programmed ‘hard’ names.

• The drive knows it is in a library or other ‘managed’ environment since one of the signal lines on

the Automation Interface) will be tied down. In this guide, the term “Automation Interface” covers both ACI (Automation Control Interface) and ADI (Automation/Drive Interface).

In this case, the drive will not go on the FC loop or connect to the fabric until it is told to. The library can optionally download new soft names (Port A, Port B and Node Name) into the drive at this point. The drive will then use this as the origin of its names. The library manufacturer would be responsible for obtaining this IEEE Registered Name. It would be a property of the library, not the drive.

• If the library wants to ‘warm swap’ drives, it can. It just ‘turns off’ the drive with the soft name

using the ACI and then turns on the spare drive, downloading the same name to it.

• If a drive is removed from the library, it will not have the ACI signal tied low and so will revert to

its original hard name. It should forget the soft name in this case.

• If the library controller breaks, the drive will time out the ACI interface in ~10 seconds. The drive

still knows it is in a library since the ACI signal is still tied low, so in this case it will use the soft name last downloaded. This will allow drive access without confusing the host.

INQUIRY command).

Device

or Node

IEEE Registered Name (last bits = 10)

Field replaceable units

An FRU code identifies which part of the hardware is considered to have failed. These codes turn up in sense data byte 14 and as the sense code qualifier for sense codes 4400h (internal target failure) and 40XX (diagnostic failure).

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Although there are no actual Field Replaceable Units on HP LTO Ultrium drives, the following sub-assemblies can be replaced at Repair Centres:

• Drive PCA • Head Assembly

• Mechanism • Front Panel

CD-ROM emulation (SCSI and SAS drives only)

The One Button Disaster Recovery (OBDR) functionality in HP LTO Ultrium drives enables them to emulate CD-ROM devices in specific circumstances (also known as being in “Disaster Recovery” mode). The drive can then act as a boot device for PCs that support booting off CD-ROM.

A CD-ROM capable drive can be switched into CD-ROM mode by powering on with the eject button held down. The drive then alters its behavior as follows:

• The front panel lights flash a “warbling” sequence.

• CD-ROM commands are executed (as opposed to tape drive mode when they would be

rejected). Commands specific to CD-ROM mode are the case of SCSI commands 08h ( interpreted as CD-ROM commands 08h (

READ), 1Bh (LOAD/UNLOAD) and 2Bh (LOCATE), these are

READ 6), 1Bh (START/STOP) and 2Bh (SEEK) respectively.

• Writing is disabled.

• Normal

INQUIRY data is modified to add a field indicating that the drive supports CD emulation

and to switch the peripheral device type field to indicate a CD-ROM drive.

• The mode header and mode block descriptor are modified.

• A CD-Emulation mode page is added.

• Mode data changes to reflect CD-ROM medium type and block size.

• Status reporting by the media access check is altered.

• The drive’s sense data when the media is not ready for access always indicates “loading”.

READ 10, READ TOC and READ CAPACITY. In

If a tape is inserted while the drive is in CD-ROM mode, the drive assumes that it will contain an image of a CD offset 20 blocks into the tape. It reads the first 250 kilobytes of this image into buffer space reserved for CD-caching. It then looks for a special message (“

SPECIFICATION

”) at the 8th byte of the 18th record of the image. If the drive fails to find this

EL TORITO

message, it ejects the tape and waits in CD-ROM mode for a properly-written CD-image tape to be inserted.

The drive will remain in CD-emulation mode until one of the following occurs:

• A

MODE SELECT command switches it back to tape drive mode using the CD-emulation mode

page.

• SCSI drives only: A SCSI bus reset occurs following the reading of at least 100 blocks of

CD-ROM data by a host.

• SAS drives only: A Logical Unit Reset task management function or a HARD_RESET primitive

sequence is received, following the reading of at least 100 blocks of CD-ROM data by a host.

• The user power-cycles the drive or resets it using the forced-eject mechanism.

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NOTE: If the drive exits CD-ROM mode through either of the first two of these, the tape will remain

at the last logical position when in CD-ROM mode.

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2Messages

Message Out support (SCSI only)

Name Code Support Abort 06h An abort condition is generated (see “Abort handling” on

page 17).

Bus Device Reset 0Ch A reset condition is generated (see “Reset strategy” on page 17). Extended Message 01h See “Extended Message Support” below. Identify 80h+ The Identify Out message is sent by the initiator to identify the

Logical Unit to be accessed and to set Disconnect Privilege.

Initiator Detected Error

Message Parity Error

Message Reject 07h This message is sent when the initiator does not support a

No Operation 08h This message has no effect and is ignored.

05h The initiator has detected an error in the data being sent in a

Command, Data or Status phase. The drive will send a restore data pointers message to retry the data transfer. (See “Message

In support (SCSI only)” below for details).

If the message is received immediately after an Identify message or after the Command Complete message has been sent, the drive will go Bus Free.

09h The initiator has detected a parity error in a message. The drive

will retry the message. (See “Message In support (SCSI only)” below for details). If the message is received immediately after an Identify message or after the Command Complete message has been sent, the drive will go Bus Free.

message sent by the drive or that the message is inappropriate. If the message being rejected is Disconnect, Synchronous Data Transfer Request or Wide Data Transfer Request, the operation continues without those features. For all other messages, the message is treated as an Abort message. If the message is received during a Command, Data or Status phase, immediately after an Identify message or after the Command Complete message has been sent, the drive will go Bus Free.

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Message In support (SCSI only)

Name Code Support Command Complete 00h This message is sent by the drive at the end of the status phase

Disconnect 04h This message is sent by the drive to indicate that it is about to

Extended Message 01h See “Extended Message Support” below. Identify 8Xh The Identify In message is sent to the initiator during reconnect

Ignore Wide Residue 23h This message is sent by the drive to the host to indicate that a

Message Reject 07h This message is sent to the initiator when the message received

Restore Pointers 03h This message causes the initiator to reset its data transfer

Save Data Pointers 02h This message instructs the initiator to save its current data

to indicate that a command is complete. Once the message is sent, the drive releases the bus and goes to Bus Free.

disconnect from the bus and go to Bus Free. During a Data phase, it is always pre-ceded by a Save Data Pointers message. If a Message Reject message is received in response to this message, then the disconnect is prevented.

to indicate which Logical Unit is reconnecting.

byte on a wide bus is not valid. This is supported whenever a wide transfer is active. It should be sent at the end of the data phase. The standard action of the drive is to send this message between the data phase and the status phase with no disconnect.

by the drive is unsupported or inappropriate.

pointers to the values they held when the last save data pointers message was sent. It will be sent when a parity error is detected on the bus or when an Initiator Detected Error message is received in order to retry the data phase.

transfer pointers for use with a subsequent Restore pointers message. This message will always be sent before a Disconnect message during data phases.

Messages28

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Extended Message support (SCSI only)

Name Code Support Synchronous Data

Transfer Request

Wide Data Transfer 03h The drive can initiate a Wide data transfer negotiation. If the

Parallel Protocol Request

Synchronous Data Transfer Request

76543210 0 Extended Message (01h) 1 Extended Message Length (03h) 2 SDTR (01h) 3 Transfer Period Factor 4 Req/Ack Offset

01h The drive can initiate a Synchronous data transfer negotiation. If

the message is received after selection and before the command phase, it will then go to message-in phase and respond with a valid response to complete the negotiation.

message is received after selection and before the command phase, it will then go to message-in phase and respond with a valid response to complete the negotiation. Note that SDTR negotiated parameters will become asynchronous after a WDTR.

04h The drive will never initiate a Parallel Protocol Request transfer

negotiation but will expect the initiator to do so. If the message is received after selection and before the command phase, it will then go to message-in phase and respond with a valid response to complete the negotiation.

Wide Data Transfer Request

76543210 0 Extended Message (01h) 1 Extended Message Length (02h) 2 WDTR (01h) 3 Transfer Width Exponent

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Parallel Protocol Request

76543 210 0 Extended Message (01h) 1 Extended Message Length (06h) 2 Parallel Protocol Request (04h) 3 Transfer Period Factor 4 Reserved (0) 5 Req/Ack Offset 6 Transfer Width Exponent 7 PComp_En RTI Rd_Strm WR_Flow Hold_MCS QAS_Req DT_Req IU_Req

Fields

Transfer Period Factor

Req/Ack Offset This has a maximum value of 255. Transfer Width

Exponent PComp_En Precompensation enable bit. Supported. RTI Retain Training Information bit. Supported. Rd_Strm 0 Read streaming and read flow control enable bit. Not supported, so the

Wr_Flow 0 Write flow control enable bit. Not supported; the drive will always return

Hold_MCS 0 Hold Margin Control Settings bit. Not supported; the drive will always

QAS_Req 0 QAS enable request bit. Not supported; the drive will always return zero. DT_Req This bit determines whether DT mode has been requested, in other words,

IU-Req Information units enabled request bit. Supported.

08h Transfer period of 6.25 ns, Paced Information Unit transfers 09h Transfer period of 12.5 ns (FAST-80). Only valid when DT transfers have

been requested 0Ch Transfer period of 50 ns (FAST-20) — LVD/SE drives only 19h Transfer period of 100 ns (FAST-10) 32h Transfer period of 200 ns (FAST-5)

For ST transfers, this can be either 0 (Narrow) or 1 (Wide). For DT transfers, it must be set to 1.

drive will always return zero.

zero.

return zero.

packetized data transfers. Supported.

Status

Messages30

A Status byte is sent from the drive to the host during the Status phase at the end of each command as specified in the SCSI specification, unless the command has been cleared by an by a

BUS DEVICE RESET message, or by a hard reset.

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ABORT message,

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The Status bytes that the drive returns are as follows:

00h GOOD: The drive has successfully completed the command. 02h CHECK CONDITION: Any error, exception, or abnormal condition that causes sense data

to be set returns

CHECK CONDITION. The REQUEST SENSE command should be sent

following this status to determine the nature of the error.

04h CONDITION MET: Never returned by an HP LTO Ultrium tape drive. 08h BUSY: The drive is unable to execute the command at this time. Try again later. The drive

tries to avoid using this status code during normal operation. It can sometimes be used after commands have been aborted, during power-on and if there are multiple selecting initiators.

10h INTERMEDIATE: Never returned by an HP LTO Ultrium tape drive. 14h INTERMEDIATE CND: Never returned by an HP LTO Ultrium tape drive. 18h RESERVATION CONFLICT: The drive is reserved by another party. See the Reservation

check.

22h COMAND TERMINATED: Never returned by an HP LTO Ultrium tape drive. 28h QUEUE FULL 40h ABORTED COMMAND

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3 Response frames and task management functions

Response frames

This section describes the format of SAS response frames returned by HP LTO Ultrium tape drives. Response frames provide a way for the drive to report the outcome of all SCSI commands and task management functions:

76543210

0–9 Reserved (0)

10 Reserved (0) DATAPRES 11 Status

12–15 Reserved (0)

16 (MSB) 19 (LSB) 20 (MSB) 23 (LSB) 24

23+

24+

23+

m+n

Sense Data Length (n bytes)

Response Data Length (m bytes)

Response Data (if any)

Sense Data (if any)

DATAPRES Specifies the format and content of the Status, Sense Data Length, Response

Data Length, Response Data, and Sense Data fields:

Code Name Description

NO_DATA

00b

RESPONSE_DATA

01b

SENSE_DATA

10b 11b Reserved

Status The Status byte is valid for all response frames, unless the

set to

RESPONSE_DATA. It indicates the outcome of the SCSI command:

GOOD

00h

CHECK CONDITION

02h

CONDITION MET

04h

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Neither response data nor sense data are present Response data is present Sense data is present

DATAPRES field is

The drive has successfully completed the command.

Any error, exception, or abnormal condition that causes sense data to be set returns

CONDITION

should be sent following this status to determine the nature of the error.

Never returned by an HP LTO Ultrium tape drive.

. The REQUEST SENSE command

CHECK

Page 34

08h

10h 14h 18h

22h

28h

30h

40h

Response Data If the

fields are not valid; the drive is reporting a response to a task management function or to an invalid request as indicated by the response code:

Code Description

00h Task management function complete 02h Invalid frame 04h Task managements function not supported 05h Task management function failed 08h Task management function succeeded 09h Incorrect Logical Unit Number

0Ah Overlapped tag attempted

All other codes are reserved.

Only valid when responding to a TASK frame.

Returned when a command/task management function or task

management function/task management function tag conflicts.

BUSY

The drive is unable to execute the command at this time. Try again later. The drive tries to avoid using this status code during normal operation. It can sometimes be used after commands have been aborted, during power-on and if there are multiple selecting initiators.

INTERMEDIATE INTERMEDIATE CND RESERVATION

CONFLICT

COMMAND TERMINATED

TASK SET FULL

Never returned by an HP LTO Ultrium tape drive. Never returned by an HP LTO Ultrium tape drive. The drive is reserved by another party. See the

Reservation check. Never returned by an HP LTO Ultrium tape drive.

The drive cannot accept another task at the moment because the internal limit has been reached. Try again later.

ACA ACTIVE

Typically not returned by an HP LTO Ultrium drive but may be in some circumstances; for example, on a Fibre Channel drive, if Host A sends Logical Unit Reset then Task Aborted would be sent to an outstanding Rewind on Host B.

TASK ABORTED

DATAPRES field is set to RESPONSE_DATA, the Status and Sense Data

Never returned by an HP LTO Ultrium tape drive.

Task management functions

This section includes all SCSI task management functions, both supported and unsupported.

Task Management functions provide an initiator and a target in the SAS domain with a means of managing specific operations or tasks. The supported functions are listed in this chapter.

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In the following table, all the supported task management functions use the Logical Unit Number field, and

ABORT TASK (01h) and QUERY TASK (80h) also use the Tag of Task to Be Managed field.

Code Task Management

Function

ABORT TASK

01h

ABORT TASK SET

02h

CLEAR TASK SET

04h

LOGICAL UNIT RESET

08h

Reserved

20h

CLEAR ACA

40h

QUERY TASK

80h

others

Reserved

Description

Performs the ABORT TASK task management function with: L = Logical Unit Number field Q = Tag of Task to Be Managed field

Performs the ABORT TASK SET task management function with: L = Logical Unit Number field

Performs the CLEAR TASK SET task management function with: L = Logical Unit Number field

Performs the LOGICAL UNIT RESET task management function with: L = Logical Unit Number field

Not supported

Performs the QUERY TASK task management function with: L = Logical Unit Number field Q = Tag of Task to Be Managed field

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4 Commands—introduction

This chapter contains notes relating to the SCSI commands listed in Chapter 5.

Summary

The following table is a summary of the SCSI commands for sequential access devices, showing the operation code:

Opcode Command Name Opcode Command Name

00h 01h 03h 05h 08h 08h 0Ah 0Bh 10h 11h 12h 13h 15h 16h 17h 19h 1Ah 1Bh 1Bh 1Ch 1Dh

25h 28h 2Bh 2Bh 34h 3Bh

TEST UNIT READY REWIND REQUEST SENSE READ BLOCK LIMITS READ READ 6 (CD-ROM) WRITE SET CAPACITY WRITE FILEMARKS SPACE INQUIRY VERIFY MODE SELECT RESERVE UNIT RELEASE UNIT ERASE MODE SENSE LOAD/UNLOAD START/STOP UNIT (CD-ROM) RECEIVE DIAG RESULTS SEND DIAGNOSTIC PREVENT MEDIUM REMOVAL

1Eh

READ CAPACITY (CD-ROM) READ 10 (CD-ROM) LOCATE SEEK (CD-ROM) READ POSITION WRITE BUFFER

A3h (05h) A3h (0Ah) A3h (0Ch) A3h (0Dh)

A3h (1Fh)

A4h (06h)

A4h (1Fh)

ABh (01h)

3Ch 43h 44h 4Ch 4Dh 55h 56h 57h 5Ah 5Eh 5Fh 8Ch 8Dh A0h

B5h C2h

READ BUFFER READ TOC (CD-ROM) REPORT DENSITY SUPPORT LOG SELECT LOG SENSE MODE SELECT (10) RESERVE UNIT (10) RELEASE UNIT (10) MODE SENSE (10) PERSISTENT RESERVE IN PERSISTENT RESERVE OUT READ ATTRIBUTE WRITE ATTRIBUTE REPORT LUNS SECURITY PROTOCOL IN REPORT DEVICE IDENTIFIER REPORT TARGET PORT GROUPS REPORT SUPPORTED OPCODES REPORT SUPPORTED TASK MGMNT FNS READ LOGGED-IN HOST TABLE Enh FW UPGRADE REPORT IMAGE INFO SET DEVICE ID Enh FW UPGRADE DOWNLOAD FW SEG Enh FW UPGRADE REBOOT READ MEDIA SERIAL NUMBER SECURITY PROTOCOL OUT SAS-specific Vendor-Unique ENABLE TLRS

Command details

The command descriptions in Chapter 5 are listed in alphabetical order of command name. Each command is described briefly. This is followed by a list of pre-execution checks which are described below. The Command Descriptor Block (CDB) is then given, with details of the various parameter bits and fields.

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Pre-execution checks

NOTE: In compliance with the SCSI specification, the drive terminates a command with a CHECK

CONDITION

code is received which is not zero.

Before executing a command, the drive makes a number of checks. They fall into three categories:

• Checks on the command sent by the host. These ensure that no reserved or fixed fields have

been set to illegal values. They check the syntax of commands, in other words the cross dependency of fields. For example, the Flag bit must not be set if the Link bit is not set.

• Checks to ensure that there are no outstanding

posted for the host that has sent the command.

• Checks on media access abilities. These are performed for commands requiring access to the

cartridge. A command is rejected if it attempts to access the cartridge when no cartridge is present or the cartridge is unloaded.

The checks are described below in alphabetical order. The usual order of execution is Illegal Field, Fixed Bit, Flag Link, Bad LUN, Reservation, Deferred Error, Unit Attention, Media Access, Media Write, Diagnostic Status, Humidity, Parameter List.

Bad LUN check

SAS drives only: For all commands except INQUIRY 12h, this checks that the LUN specified by the host is zero. The LUN is taken from the block.

status and sets the sense key to ILLEGAL REQUEST when a reserved bit, byte, field or

UNIT ATTENTION or DEFERRED ERROR events

COMMAND frame that encapsulates the command descriptor

• If the LUN is unsupported, and the host command is not

reported to the host with a sense key of unit not supported).

• If the LUN is unsupported, and the host command is

replaced with a sense key of supported). This new sense data is returned to the host. Once the command has completed successfully, the sense data is cleared.

Deferred Error check

A deferred error is generated when a command with immediate report fails after the report has been returned. The check looks to see if a deferred error exists for the host which sent the command, in other words, a deferred error for which such an error exists, then the drive reports set to

DEFERRED ERROR (which was generated when some previous command failed).

Note that if a the

DEFERRED ERROR condition will be reported first. This is because the operation leading to the

deferred error must have been older than that leading to the unit attention. The drive reports the conditions in the order in which they arose.

Commands—introduction38

UNIT ATTENTION condition and a DEFERRED ERROR condition both exist for an initiator,

REQUEST SENSE, CHECK CONDITION is

ILLEGAL REQUEST, and additional sense of 2500h (logical

REQUEST SENSE, the original sense data is

ILLEGAL REQUEST, and additional sense of 2500h (logical unit not

CHECK CONDITION status has not yet been reported. If CHECK CONDITION. The sense data for the command is

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Diagnostic Status check

This ensures that the drive is in a fit state to access the media. It does this by checking that there is no

DIAGNOSTIC FAIL status within the drive.

If the drive has failed diagnostics,

ERROR

and additional sense of 400Xh (diagnostic failure on component X).

Fixed Bit check

For the READ, VERIFY and WRITE commands, a Fixed bit set to 1 indicates that the length parameter of the command is for fixed block mode. If fixed block mode is selected then the block size in the Mode Select block descriptor must not be zero. Otherwise sense data is set as described for the

Flag Link check

This check ensures that the host has not set the Flag bit in the control byte of the command without setting the Link bit as well. If the test fails then

ILLEGAL REQUEST and additional sense of 2400h (invalid field in CDB). The Flag field is identified as

the bad field.

Illegal Command check

If the drive does not recognize the opcode of the command that it has been sent, it will do one of the following:

• Report

additional sense code will be set to 2000h (invalid command opcode).

• Report an invalid field in the command descriptor block. The sense key will be set to

REQUEST

pointer in the sense data will be zero.

CHECK CONDITION status. The sense key will be set to ILLEGAL REQUEST and the

, the additional sense code will be set to 2400h (invalid field in CDB) and the field

CHECK CONDITION is reported with a sense key of HARDWARE

CHECK CONDITION is reported and the

ILLEGAL FIELD check.

CHECK CONDITION is reported with a sense key of

ILLEGAL

Illegal Field/Request check

Checks are performed to ensure the host has not set any of the following in the command descriptor block:

• a fixed field

• a reserved field

• the control field

• two or more fields to logically conflicting values

If a field has been set to an illegal value:

• C

HECK CONDITION status is reported to the host with a sense key of ILLEGAL REQUEST and

additional sense of 2400h “invalid field in CDB”.

• The sense key specific bit is set and the sense key specific bytes will be a field pointer.

• The command/data bit is set, indicating that the illegal parameter was in the command.

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NOTE: Command descriptor blocks are scanned from left (bit 7) to right (bit 0), and down (from

byte 0 to byte n). The field pointer will be set to point to the first bit of the first illegal field encountered using this scanning route. In some cases, where multiple fixed fields are contiguous, the field pointer might be set to point to the first bit of the first fixed field in the group of fixed fields, whereas the actual illegality may lie in a later bit.

Media Access check

This checks if the drive is able to perform media access commands. If the media is inaccessible then

CHECK CONDITION status is reported with a sense key of NOT READY. The additional sense will be

set to one of the codes associated with the

NOT READY key.

Media Information check

During power-on and following a SCSI reset, knowledge of the whereabouts of the cartridge is unavailable. It is not possible to execute commands which assume that this knowledge is available until the drive has recovered from the power-on or reset.

The test checks whether the drive knows if a cartridge is physically present in the drive.

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If information about the tape cartridge is not available, the test fails with CHECK CONDITION, a sense key of

NOT READY, and additional sense of 3E00 (logical unit has not self-configured yet).

Media Write check

This checks whether the media is write-protected. If it is, CHECK CONDITION is reported with a sense key of

DATA PROTECT and additional sense of 2700h (write-protected).

Parameter List check

For LOG SELECT, MODE SELECT and some diagnostic commands, the associated data sent to the drive is in the form of parameter lists. These are described under the command names in the next chapter. Checks are performed to test the following:

• Fixed and reserved fields have not been modified. Fixed fields are indicated by a number in

round brackets following the field name.

• A field has been set to an invalid value.

• The syntax of the page of parameters has been violated—for example, where a particular value

in one field imposes limitations on the valid range for another field.

If a field has been set to an illegal value, of

ILLEGAL REQUEST and additional sense of 2600h (invalid field in parameter list).

The drive scans the data in the Command Description Block from “left” (bit 7) to “right”, and “down” (from byte 0 to byte n). It sets the field pointers to the first bit of the first bad field encountered. If the bad field is contained in a contiguous group of fixed fields, the pointers indicate the first bit of the first field in the group, even though the error may be in a later field in the group.

NOTE: With MODE SELECT, the drive checks the integrity of the whole parameter list before acting

on any parameters, so all the mode parameters need to be correct before any of them are implemented.

Reservation check

This checks to see if the drive has been reserved for use by a host, and if it has, whether the host is the same host that sent the command being executed.

If the drive has been reserved for some other host then

See the (page 207) commands.

PERSISTENT RESERVE OUT (page 134), RELEASE UNIT (page 173) and RESERVE UNIT

Unit Attention check

This checks if a UNIT ATTENTION condition exists for the host which sent the command. If it does, the drive reports data will be set according to the unit attention condition which exists. See Unit Attention Sense in the description of the

CHECK CONDITION status with a sense key of UNIT ATTENTION. The remaining sense

CHECK CONDITION is reported to the host with a sense key

RESERVATION CONFLICT status is reported.

REQUEST SENSE command on page 189.

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Command descriptor block

A SCSI command descriptor block (CDB) is a sequence of 6, 10, 12 or 16 bytes sent by a host to a SCSI target with the bus in command phase. The CDB tells the drive what action should be performed. The final byte is known as the Control byte.

7 654 3 2 10 0 Group Code Operation Code 1 Reserved (0) 2 (MSB)

-1 (LSB)

Vendor Unique (0) Reserved (0) NACA(0) Flag (0) Link (0)

There are a number of fields in a CDB which are common to all commands. These are shown in the following table.

Multi-Byte Parameter

Group Code

and

Operation

Code

Reserved A reserved field should always be set to zero. The drive checks reserved fields,

Multi-Byte Parameter

Control The control field is mainly concerned with the use of linked commands. These are

Vendor-Unique This field is ignored by the firmware NACA 0 The Normal ACA flag is 0, indicating that it is not supported. Flag 0 Link 0 Linked commands are not supported.

The operation code uniquely identifies the command. The top three bits of the operation code are known as the group code and these define the length of the command descriptor block:

Group 0 Group 1 Group 2 Group 3 Group 4 Group 5 Group 6 Group 7

and if one is non-zero then it will reject the command with A multi-byte parameter field in a command is “big-endian”, that is, bit 7 of the first

byte of this field is the most significant.

not supported by the LTO SCSI Command Set, so a generated if this field is set to anything other than zero.

Six-byte commands Ten-byte commands Ten-byte commands Six-byte commands Sixteen-byte commands Twelve-byte commands Vendor-unique commands not supported

CHECK CONDITION.

CHECK CONDITION will be

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5 Commands

This chapter describes all SCSI commands. Parts of the chapter are based on sections of the SCSI specification (see page 11).

For general notes on the command descriptions, see Chapter 4.

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Enhanced FIRMWARE UPGRADE DOWNLOAD FIRMWARE SEGMENT A4h (1Fh)

Description

The Enhanced FIRMWARE UPGRADE DOWNLOAD FIRMWARE SEGMENT command allows the application client to download a firmware image, via an internal cache buffer, to the Secondary Image bank. No image should be considered written to the flash until this command, sent with LAST=1, returns

Pre-execution checks

Unit Attention Illegal Field Reservation Deferred Error

Command descriptor block

0 Operation Code (A4h) 1 Reserved (0) Service Action (1Fh) 2 HP LTO VU MI Opcode (05h) 3 (MSB) 5 (LSB) 6 (MSB) 8 (LSB) 9 Reserved (0)

10 Reserved (0) Last 11 Control

GOOD status.

76543210

Segment Offset

Segment Length

CDB fields

Segment Offset The offset within the bank at which this segment will be stored. The

application client must set this to zero for the first download segment command. (It is possible to re-start the firmware download process many times by setting Segment Offset to zero).

The field has the following restrictions:

• It must be a multiple of 4 bytes.

• It must reside within the bank size (1.91 MB).

The application client is starting a firmware download process.

Segment Length The length in bytes allocated of the segment transferred.

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Last 0

The segment will be copied to the internal cache buffer at the specified offset.

It is assumed that the last byte of the image is Segment Offset + Segment

Length. Then the whole image is validated, and if correct, transferred from the cache buffer to flash. Status will not be returned until the firmware has been successfully written to the Secondary Image bank.

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Enhanced FIRMWARE UPGRADE REBOOT A4h (1Fh)

Description

The Enhanced FIRMWARE UPGRADE REBOOT command causes the drive to reset and boot from the Primary Image bank. Status will be returned before reboot takes place. Before the reboot, all buffered write data is written to tape, and the tape is unloaded, or unthreaded depending on configuration settings.

Pre-execution checks

Unit Attention Illegal Field Reservation Deferred Error

Command descriptor block

76543210 0 Operation Code (A4h) 1 Reserved (0) Service Action (1Fh) 2 HP LTO VU MI Opcode (06h) 3 Reserved (0) Swap 4

10 11 Control

Reserved (0)

CDB fields

Swap Segment Length

Commands46

The drive resets and reboots the currently running firmware, so the

association of Primary and Secondary Images will remain unchanged. Enabled Automation Ports will be disabled, and the library controller needs to re-enable them.

The drive swap which banks are associated with the Primary and Secondary

Images before resetting the drive. Use this to reboot the drive with the firmware most recently downloaded to the Secondary Image.

Regardless of the value of the Swap field, the reboot command should not cause the drive to be offline for more than about 7 seconds.

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Enhanced FIRMWARE UPGRADE REPORT IMAGE INFO A3h (1Fh)

Description

The Enhanced FIRMWARE UPGRADE REPORT IMAGE INFO command returns a number of image descriptors to the application client up to the size specified in the Allocation Length field.

Pre-execution checks

Unit Attention Illegal Field Reservation Deferred Error

Command descriptor block

76543210 0 Operation Code (A3h) 1 Reserved (0) Service Action (1Fh) 2 HP LTO VU MI Opcode (05h) 3 5 6 (MSB) 7 (LSB) 8

10 11 Control

Reserved (0)

Allocation Length

Reserved (0)

CDB fields

Allocation Length The drive will return up to this number of bytes, truncating any parameter

data as required.

Returned data

76543210 0 Firmware Image Info Version 1 Reserved (0) 2 (MSB) 3 (LSB) 4 (MSB)

47 (LSB) 48 (MSB) 91 (LSB)

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Firmware Image Info Length

Firmware Image Descriptor 0

Firmware Image Descriptor 1

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Firmware Image Info

The version of the following descriptors. Currently at version 1.

Version Firmware Image Info

Length

The total length in bytes of the descriptors that follow. Version 1 descriptors are 28 bytes in length, for a dual bank drive this field will be 56.

Firmware image descriptor (version 1)

76543210 0 Bank ID 1 Reserved (0) Status Rsvd (0) Primary 2

Reserved (0)

3 4 (MSB) 7 (LSB) 8 (MSB)

15 (LSB) 16 (MSB)

Publication Revision

Firmware Revision

Image Build Time

19 (LSB) 20 (MSB) 23 (LSB) 24 (MSB) 27 (LSB)

Image Size

Bank Size

Status 000b

001b–101b

011

100b–111b

The image in good (no errors) Reserved The bank does not contain an image. Reserved

Primary This field will be set if this is the Primary Image bank. Publication Revision As reported in bytes 32–35 of the standard

INQUIRY data.

Firmware Revision As reported in bytes 30–48 of VPD page C0h. Image Build Time The time (UTC-based) at which this firmware image was built. Image Size The size of the stored image in bytes Bank Size The size of the bank in bytes

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ERASE 19h

The ERASE command is used to erase data on tape from the current logical position. The Long bit is used to decide whether the ‘old’ data is physically overwritten or not. FC and SCSI drives only: E will not overwrite or erase user data on tape.

Pre-execution checks

Illegal Field Reservation Deferred Error Unit Attention Media Access Media Write Diagnostic Status

Command descriptor block

76543210 0 Operation Code (19h) 1 Reserved (0) Immed Long

2–4 Reserved (0)

5 Control

CDB fields

Immed 0 The drive reports status after the command has completed.

The drive reports status when it starts the command (after any pre-execution

checks and prerequisite unloads have completed).

Long The Long bit controls the distance to be erased.

0 The current position becomes the end of logical data. 1 End of Data is written, followed by Data Set Separators to the end of the tape.

RASE commands (short or long) to a drive containing a WORM cartridge

NOTE: Short erase is only used to truncate data at the current logical position. It cannot be used to

create a “hole” in the tape into which data can subsequently be written “in place”. This will merely cause the drive to streamfail. The logical tape position is unaffected by this command. A

CONDITION

logically positioned past EOT immediately before the erase.

for Early Warning EOM (drive error code 2C98h) will only be given if the tape is

CHECK

Erase specific status

Event Status Key Additional Sense

The erase fails WORM media: Erase would

result in user data being over-written.

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CHECK CONDITION HARDWARE ERROR CHECK CONDITION DATA PROTECT

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5100h (erase failure) 300Ch (WORM medium

—overwrite attempted)

Page 50

INQUIRY 12h

INQUIRY tells the drive to return information about the basic operating parameters to the host. These parameters cannot be changed. The drive returns Inquiry data to the host in a data-in phase.

NOTE: This command is immune from most of the pre-execution checks that other commands must

pass (for example, it can be executed while the unit is reserved for another host). U

deferred error conditions are preserved and reported on subsequent commands.

Pre-execution checks

Only the Illegal Field Check is performed before the command is executed.

nit attention and

If the EVPD bit is clear, the page code must be zero, otherwise

If the EVPD bit is set, the page code must be one of the supported page codes for Inquiry data. Otherwise

illegal request is reported.

Command descriptor block

76543210 0 Operation Code (12h) 1 LUN Reserved (0) EVPD 2 Page Code 3 4 5 Control

Allocation Length

CDB fields

LUN This field is ignored. EVPD Enable Vital Product Data

01Normal inquiry data is returned.

A page of vital product data is returned.

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Page Code

Allocation Length

If the EVPD bit is zero the Page Code field must be zero. If the EVPD bit is set to 1, the drive returns the Inquiry page in this Page Code field:

Supported Vital Product Pages page

00h

Unit Serial Number page

80h

Device Identification page

83h

Management Network Address page

85h

Extended Inquiry Data page

86h

Mode Page Policy page

87h

SCSI Ports page

88h

Sequential Access Device Capabilities page

B0h

Manufacturer-assigned Serial Number page

B1h

TapeAlert Supported Flags page

B2h

Firmware Revision Levels page

C0h

Hardware Revision Levels page

C1h

PCA Revision Levels page

C2h

Mechanism Revision Levels page

C3h

Head Assembly Revision Levels page

C4h

ACI page

C5h

HP Alternative Inquiry page (variant specific)

CCh

HP Unique Inquiry page (variant specific)

D0h

The maximum amount of data (in bytes) that should be returned. If more than this is available, the amount returned is truncated to allocation length. No error is reported.

INQUIRY data pages

Returned data:

INQUIRY returns its standard data if the EVPD bit is zero, or returns a page of data as specified by the Page Code field when EVPD is one.

Standard Inquiry Data format (LUN0)

This is the data returned by the drive in response to an Inquiry command with its EVPD bit set to zero. The data also depends on the value of the LUN field in the Inquiry CDB, the LUN value in the identify message and the configuration of the drive.

Note that the data below is for the standard distribution firmware.

7654 3 2 1 0 0 Peripheral Qualifier (000b) Peripheral Device Type (01h) 1 RMB (1) Reserved (0) 2 Version Number (5) 3 Obsolete NACA(0) HiSup(0) Response Data Format (2)

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7654 3 2 1 0 4 Additional Length (5Bh) 5 SCCS (0) ACC (0) TPGS (01b) 3PC (0) Reserved (0) Protect(0) 6 BQue(0) EncSvr(0) VS(0) MultiP(0) MChngr(0) Obsolete Adr16* 7 Obsolete WBus16* Sync* Linked(0) Obsolete CmdQue(1) VS(0) 8 (MSB)

15 (LSB) 16 (MSB)

Vendor Identification

(“HP “)

Product Identification

31 (LSB) 32 (MSB) 35 (LSB) 36 39

Product Revision Level

Reserved (0)

40 WORM Version WORM 41 42 43 (MSB)

OBDR string (“$DR-10”) or Reserved (0) if not supported

Variant Specific

48 (LSB) 49 55

Reserved (0)

56 Reserved (0) Clocking QAS (0) IUS 57 Reserved (0) 58 (MSB)

Version Descriptor 1

59 (LSB)

- - - - - - - -

72 (MSB)

Version Descriptor 8

73 (LSB)

Reserved (0)

* for FC and SAS drives, these fields are (0)

The Standard Inquiry Data is based on the SCSI 3 standard for Standard Inquiry Data.

For the LUN to which the drive is attached, the Peripheral Qualifier field is set to 000b, the Peripheral Device Type field is set to 01h, the Removable Medium (RMB) flag is set to 1 and the Device-type modifier is set to 0.

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Inquiry Data fields

Peripheral Qualifier 000b

There is a device on the logical unit selected, so the LUN field in the identify message was 0.

011b

The LUN field in the identify message has specified an unsupported logical unit. This means any LUN other than 0.

Peripheral Device Type

01h 05h 1Fh

Sequential Access Device CD Device (reported when in OBDR mode) No Device (the Peripheral Qualifier will be 011b in this case)

RMB 1 The Removable Medium bit is one, indicating that the tape can be

removed.

Device-Type

0 This is a six-bit user defined code, set to zero.

Modifier Version Number 5 Indicating that the drive complies with the SPC-3 standard. NACA 0 The Normal ACA flag is 0, indicating that it is not supported. HiSup 0 The Hierarchical Support flag is 0, indicating that the hierarchical

addressing model is not supported.

Response Data

2 The Inquiry Data format complies with the SCSI-3 standard.

Format Additional Length The length in bytes of the length of the rest of the Inquiry data.

5Bh There are 91 (5Bh) more bytes of Inquiry data.

SCCS 0 No storage array controller component is embedded in the drive. ACC 0 No Access Controls Coordinator may be addressed through this

LUN.

TPGS 01b Target Port Group Support. Only implicit asymmetric logical unit

access is supported.

3PC 0 Third-Party Copy commands are not supported. Protect 0 Protection information is not supported. BQue Basic Queuing flag

0 The flag is zero for SCSI and SAS drives, with CmdQue = 1. 1 The flag is 1 for Fibre Channel drives, with CmdQue = 0.

EncSvr 0 The drive does not support Enclosure Services command. VS 0 Vendor-Specific field—not currently used MultiP 1 The drives has multiple ports. MChngr 0 The drive is not embedded within or attached to a medium

transport element.

Adr16, WBus16, Sync

0 FC and SAS drives: These features are not applicable. 1 SCSI drives: These features are supported.

Linked 0 The drive does not support linked commands.

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CmdQue 0 FC drives: With BQue = 1

1 SCSI and SAS drives: With BQue = 0. For SAS, the full queuing

model is supported.

Vendor Identification

Product Identification

A vendor-specific, 8-byte string of ASCII characters, left justified and padded with space characters “HP”.

A left-justified, vendor-specific, 16-byte string field of ASCII characters with space character padding on the right. The string consists of two parts:

• First half (bytes 16–23): “Ultrium”

• Second half (bytes 24–31): “<generation>-<interface type>”

The following string has been defined:

All LTO-4 drives: “Ultrium 4-SCSI”

Product Revision Level

A vendor-specific string of four ASCII characters: “PdsV”:

• P specifies the product (for LTO4 drives, “H” for FC, “B” for SCSI, “A” for

SAS).

• d denotes the major release level.

• s is the minor release level.

• V is a unique identifier for each variant of code.

WORM Version The version of WORM supported. WORM 1 The drive supports the LTO WORM specification. OBDR string “$DR-10” if the drive supports Tape Disaster Recovery. Clocking 0 For FC and SAS drives.

3 For SCSI drives, indicating that the drive supports both ST and DT

transfers.

QAS 0 The drive does not support Quick Arbitration and Selection. IUS Information Units

0 FC and SAS drives: Not applicable 1 SCSI drives: Supported

Version Descriptor These fields can be used to identify up to eight standards to which the drive

conforms. The values supported are listed below.

Value Standard

FC drives: 1

005Ch 2 3 4 5 6 7 8

0917h

0D7Dh

0DBCh

131Ch

133Ch

0314h

037Dh

SAM-2 ANSI INCITS.366:2003 FCP-2 ANSI NCITS.332:1999 FC-AL-2 ANSI NCITS.350:200x with AM1:2002 FC-FS ANSI NCITS.373:2003 FC-Tape ANSI NCITS TR-24:1999 FC-FLA ANSI NCITS TR-20:1998 SPC-3 ANSI NCITS 408-2005 SSC2 ANSI NCITS.380:2003

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SCSI drives: 1

2 3 4

5–8

SAS drives: 1

2 3 4

5–8

Vendor Specific data may be sent after the Product Revision Level.

005Ch

0B56h 0314h 037Dh 0000h

005Ch 0C0Fh 0314h 037Dh 0000h

Vital Product Data pages

The following tables describe the vital product data pages. These pages are returned by the

INQUIRY command when the EVPD bit is set and the appropriate Page Code is set in the Command

Descriptor Block. They contain vendor-specific product information.

Supported Vital Product Data Pages page

This is the data returned by the drive in response to an Inquiry command with its EVPD bit set to one and its Page Code field set to 0.

This page contains a list of all the VPD page-codes supported by the drive.

76543210 0 Peripheral Qualifier (0) Peripheral Device Type (1) 1 Page Code (00h) 2 Reserved (0) 3 Page Length (XXh) 4 Supported Pages Code (00h) 5 Unit Serial Number page (80h) 6 Device Identification page(83h) 7 Management Network Address page (85h) 8 Extended Inquiry Data page (86h) 9 Mode Page Policy page(87h)

10 SCSI Ports page (88h) 11 Sequential Access Device Capabilities page (B0h) 12 Manufacturer-assigned Serial Number page (B1h) 13 TapeAlert Supported Flags page (B2h) 14 Firmware Revision Levels page (C0h) 15 Hardware Revision Levels page (C1h)

SAM2 ANSI INCITS.366.2003 SPI4 ANSI INCITS.362:2002 SPC-3 ANSI NCITS 408-2005 SSC2 ANSI INCITS.380:2003 not used

SAM2 ANSI INCITS.366.2003

SAS1.1 T10/1601-D revision 10

SPC-3 ANSI NCITS 408-2005 SSC2 ANSI INCITS not used

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76543210 16 PCA Revision Levels page (C2h) 17 Mechanism Revision Levels page (C3h) 18 Head Assembly Revision Levels page (C4h) 19 Auto-Changer Interface Revision Levels page (C5h)

Unit Serial Number page

The Unit Serial Number page contains a single value which is a 10-byte ASCII string. The string, with the Vendor Identification and Product Identification fields in the standard Inquiry data, uniquely identifies the drive.

76543210

0 Peripheral Qualifier (0) Peripheral Device Type (1) 1 Page Code (80h) 2 Reserved (0) 3 Page Length (0Ah) 4 (MSB)

13 (LSB)

Device Identification page

Serial Number

The Device Identification page contains information that identifies the tape drive uniquely.

76543210

0 Peripheral Qualifier (0) Peripheral Device Type (1) 1 Page Code (83h) 2 Reserved (0) 3 Page Length (n−3) 4 (MSB) n (LSB)

Identification Descriptors are constructed as follows:

76543210

0 Protocol Identifier Code Set 1 PIV Rsvd (0) Association Identifier Type 2 Reserved (0) 3 Identifier Length (n−3)

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Identification Descriptors

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76543210 4 (MSB) n (LSB)

Identifier

Protocol Identifier

Code Set 1 The Identification Descriptor is a binary field.

PIV 1 The Protocol Identifier field is valid. This is set for an Association value of 1 or

Association 0 The Identifier field is associated with the addressed logical unit.

Identifier Type

Defined identifiers

The following identifiers will be returned in the given order. What Port Name is returned depends on which port the Inquiry is sent through.

0h Fibre Channel 1h Parallel SCSI 6h Serial Attached SCSI (SAS)

2 The Identification Descriptor contains only ASCII data.

1 The Identifier field is associated with the port that received the request. 2 The Identifier field is associated with the SCSI target device that contains the

addressed logical unit. 3Reserved 1 Vendor ID followed by the product identification field from the standard inquiry

data and the serial number field from the Serial Number Inquiry page. 3 FC drives: Identification descriptor is the 64-bit IEEE Registered World Wide

Name (in NAA identifier format). 4 Relative Port identifier 5 Target Port Group identifier

Logical Unit Identifier

76543210 0 Protocol Identifier (0) Code Set (1) 1 PIV (0) Rsvd (0) Association (0) Identifier Type (3) 2 Reserved (0) 3 Identifier Length (8) 4 (MSB)

11 (LSB)

SSC Device Logical Unit Name (IEEE Registered Name)

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Port Name

(FC and SAS drives)

76543210 0 Protocol Identifier (0) Code Set (1) 1 PIV (1) Rsvd (0) Association (1) Identifier Type (3) 2 Reserved (0) 3 Identifier Length (8) 4 (MSB)

11 (LSB)

Port Name

(IEEE Registered Name)

Port Identifier

(FC and SAS drives)

76543210 0 Protocol Identifier Code Set (1) 1 PIV (1) Rsvd (0) Association (1) Identifier Type (4) 2 Reserved (0) 3 Identifier Length (4) 4 (MSB) 7 (LSB)

Port Identifier

The Port Identifier will be set to 1 if the addressed port is port A, and set to 2 if the addressed port is Port B.

Target Port Group Identifier

76543210 0 Protocol Identifier Code Set (1) 1 PIV (1) Rsvd (0) Association (1) Identifier Type (5) 2 Reserved (0) 3 Identifier Length (4) 4 5 6 (MSB) 7 (LSB)

Reserved (0)

Target Port Group

Target Port Group indicates the group to which the target port is a member. For more information, see ”REPORT TARGET PORT GROUPS A3h” on page 186.

Target Name (code set 1)

76543210 0 Protocol Identifier Code Set (1)

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76543210 1 PIV (1) Rsvd (0) Association (2) Identifier Type (3) 2 Reserved (0) 3 Identifier Length (8) 4 (MSB)

11 (LSB)

Target Name (code set 2)

76543210 0 Protocol Identifier Code Set (2) 1 PIV (1) Rsvd (0) Association (2) Identifier Type (1) 2 Reserved (0) 3 Identifier Length (34) 4 (MSB)

11 (LSB) 12 (MSB) 27 (LSB) 28 (MSB) 37 (LSB)

Device Name

(IEEE Registered Name)

Vendor ID

Product Identification

Serial Number

Management Network Address VPD page

The Management Network Addresses page provides a list of network addresses of management services associated with a SCSI target device, target port, or logical unit.

76543210 0 Peripheral Qualifier Peripheral Device Type 1 Page Code (85h) 2 3 4 (MSB)

(MSB)

n (LSB)

Each Network Services Descriptor is defined as follows:

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Network Services Descriptor (first)

Network Services Descriptor (last)

Page Length (n−3)

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(LSB)

Page 60

NOTE: The contents of descriptors are set by an application client outside the scope of the

definition of this page, so no detail is given here.

76543210 0 Rsvd (0) Association Service Type 1 Reserved (0) 2 (MSB) 3 (LSB) 4 (MSB) n (LSB)

Network Address Length (n−3)

Extended INQUIRY Data VPD page

This page provides an application client with a means of obtaining information about the drive.

7 6 5 4 3 2 1 0 0 Peripheral Qualifier (0) Peripheral Device Type (1) 1 Page Code (86h) 2 Reserved (0) 3 Page Length (3Ch) 4 Reserved (0) RTO (0) Grd_Chk(0) App_Chk(0) Ref_Chk(0) 5 Reserved (0) Group_Sup(0) Prior_Sup(0) HeadSupP(0) OrdSup(0) SimSup(1) 6 Reserved (0) NV_Sup(0) V_Sup (0) 7

Network Address

Reserved (0)

SimSup 1 The drive supports the Simple Task attribute.

Mode Page Policy VPD page

The Mode Page Policy VPD page enables an application client to find what mode page policy is in effect for supported mode pages. One descriptor is returned for each mode page, or group of mode pages, that have a specific page policy in effect.

The returned data has the following format:

7 6 5 4 3 2 1 0 0 Peripheral Qualifier (0) Peripheral Device Type (1) 1 Page Code (87h)

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7 6 5 4 3 2 1 0 3 4

Page Length (n-3)

Mode Page Policy Descriptor List

Mode Page Policy Descriptors are as follows:

7 6 5 4 3 2 1 0 0 Reserved (0) Policy Page Code 1 Policy Sub-Page Code 3 MLUS Reserved (0) Mode Page Policy 4 Reserved (0)

Policy Page Code The mode page to which this descriptor applies.

3Fh All mode pages

Policy Sub-Page Code The sub-page to which this descriptor applies.

FFh All sub-pages

MLUS Multiple Logical Units Shared

0 The mode page and sub-page indicated are maintained separately

by each logical unit.

1 This combination of Policy Page Code and Policy Sub-Page Code is

shared by more than one logical unit.

Mode Page Policy The policy in effect for the combination of Policy Page Code and Policy

Sub-Page Code:

Shared

00b

Per Target port

01b

Per Initiator port

10b

Per I_T Nexus

11b

The following Mode Page Policy Descriptors are returned:

FC drives:

Policy Page Code Policy Sub-Page Code Mode Page Policy MLUS

3Fh FFh 00b 0

02h 00h 00b 1 18h 00h 00b 1 19h 00h 00b 1

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SCSI drives:

Policy Page Code Policy Sub-Page Code Mode Page Policy MLUS

3Fh FFh 00b 0 02h 00h 00b 1 18h 00h 00b 1 19h 00h 00b 1 19h 01h 00b 1 19h 02h 00b 1 19h 03h 00b 1 19h 04h 00b 1

SAS drives:

Policy Page Code Policy Sub-Page Code Mode Page Policy MLUS

3Fh FFh 00b 0 02h 00h 00b 1 18h 00h 01b 1 19h 00h 01b 1 19h 01h 01b 1

SCSI Ports VPD page

The SCSI Ports VPD page provides a means of retrieving identification descriptors for all SCSI ports in a SCSI target device or SCSI target/initiator device.

The returned data has the following format:

7 6 5 4 3 2 1 0 0 Peripheral Qualifier (0) Peripheral Device Type (1) 1 Page Code (88h) 3 4

SCSI Port Identification Descriptor List

FC drives:

The following SCSI Port Identification Descriptors (one per port enabled) are returned for FC drives:

7 6 5 4 3 2 1 0

0–1 Reserved (0)

2 3

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Page Length (n-3)

Port Identifier

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7 6 5 4 3 2 1 0

4–9 Reserved (0)

10 11

Target Port Descriptor Length (0Ch)

12 Protocol Identifier (0) Code Set (1) 13 PIV (1) Rsvd (0) Association (1) Identifier Type (3) 14 Reserved (0) 15 Identifier Length (08h) 16 23

Port Name (IEEE Registered Name—see page 16)

SCSI drives:

The following SCSI Port Identification Descriptor is returned for SCSI drives:

7 6 5 4 3 2 1 0

0–1 Reserved (0)

2 3

Relative Port Identifier (0)

4–9 Reserved (0)

10 11

Target Port Descriptor Length (2Ch)

12 Protocol Identifier (1) Code Set (2) 13 PIV (1) Rsvd (0) Association (1) Identifier Type (1) 14 Reserved (0) 15 Identifier Length (28h) 16 23 24 39 40

Vendor Identification

Product Identification

Serial Number

49 50 55

“PScsi”

SAS drives:

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The following SCSI Port Identification Descriptors (one per port enabled) are returned for SAS devices:

7 6 5 4 3 2 1 0

0–1 Reserved (0)

2 3

4–9 Reserved (0)

10 11 12 Protocol Identifier (6) Code Set (1) 13 PIV (1) Rsvd (0) Association (1) Identifier Type (3) 14 Reserved (0) 15 Identifier Length (08h) 16 23

Port Identifier 0001h The addressed port is port A.

Protocol Identifier 00h Fibre Channel

Code Set 1 The Identification Descriptor is a binary field.

PIV 1 The Protocol Identifier field is valid. The PIV flag is set to one for an

Association 1 The Identifier field is associated with the port that received the request. Identifier Type 1 The subsequent fields contain the Vendor ID followed by the product

Port Name (IEEE Registered Name—see page 16)

0002h The addressed port is port B.

01h SCSI 06h SAS

Target Port Descriptor Length (0Ch)

2 The Identification Descriptor contains only ASCII data.

association value of 1 or 2.

identification field from the standard inquiry data and the serial number field from the Serial Number Inquiry Page.

3 The subsequent field is the Fibre Channel 64-bit Name Identifier.

Port Identifier

Sequential Access Device Capabilities page

This page provides the application client with a means of determining which features are supported by the Device Server.

7 6 5 4 3 2 1 0 0 Peripheral Qualifier (0) Peripheral Device Type (1) 1 Page Code (B0h)

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7 6 5 4 3 2 1 0 2 Reserved (0) 3 Page Length (4h) 4 Reserved (0) WORM

5–7 Reserved (0)

WORM 1 The Device Server supports Write Once Read Many (WORM) operation.

Manufacturer-assigned Serial Number page

The Manufacturer-assigned Serial Number page provides the application client with a method of determining the device serial number as originally assigned by the manufacturer. The same will returned in the Unit Serial Number page unless an automation controller has provided a new serial number; however this page will always reflect the original serial number.

7 6 5 4 3 2 1 0 0 Peripheral Qualifier (0) Peripheral Device Type (1) 1 Page Code (B1h) 2 3

4–13 Serial Number

Page Length (000Ah)

TapeAlert Supported Flags page

This page enables the application client to determine which TapeAlert flags are supported by the Device Server.

7 6 5 4 3 2 1 0 0 Peripheral Qualifier (0) Peripheral Device Type (1) 1 Page Code (B2h) 2 Reserved (0) 3 Page Length (8h)

4 01h (1) 02h (1) 03h (1) 04h (1) 05h (1) 06h (1) 07h (1) 08h (0) 5 09h (1) 0Ah (1) 0Bh (1) 0Ch (1) 0Dh (1) 0Eh (1) 0Fh (1) 10h (1) 6 11h (1) 12h (1) 13h (1) 14h (1) 15h (1) 16h (1) 17h (1) 18h (1) 7 19h (1) 1Ah (1) 1Bh (1) 1Ch (1) 1Dh (1) 1Eh (1) 1Fh (1) 20h (1) 8 21h (1) 22h (1) 23h (1) 24h (1) 25h (1) 26h (1) 27h (1) 28h (0) 9 29h (0) 2Ah (0) 2Bh (0) 2Ch (0) 2Dh (0) 2Eh (0) 2Fh (0) 30h (0)

10 31h (0) 32h (1) 33h (1) 34h (1) 35h (1) 36h (1) 37h (1) 38h (1)

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Flags

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7 6 5 4 3 2 1 0

11 39h (1) 3Ah (1) 3Bh (1) 3Ch (1) 3Dh (0) 3Eh (0) 3Fh (0) 40h (0)

Supported flags are set to 1. For information on the flags, see ”TapeAlert log page” on page 87

Drive Component Revision Levels pages

7 6 5 4 3 2 1 0 0 Peripheral Qualifier (0) Peripheral Device Type (1) 1 Page Code 2 Reserved (0) 3 Page Length (5Ch) 4 (MSB)

29 (LSB) 30 (MSB) 48 (LSB) 49 (MSB) 72 (LSB)

73 (MSB)

95 (LSB)

Component (“CCCCCCCCCCCC”)

Version (“RRR.VVV”)

Date (“YYYY/MM/DD hh:mm”)

Variant ( “XXXXXXXXXXXX”)

The Drive Component Revision Levels pages contain details of the revisions of each of the major sub assemblies of the drive. For any given product, if these pages are the same then the drive has been built with the same components and with the same manufacturing process.

Each entry is a null-terminated ASCII string.

Page Code Page Code Component Name

C0h - Firmware C1h - Hardware C2h - PCA C3h - Mechanism C4h - Head Assembly C5h - ACI

Component A 12-character entry to identify the component that the revision is for. Version A 7-character version code with a three-digit major revision number, a period and a

three-digit minor version number.

Date The date of the version.

Commands66

“Firmware” “Hardware” “PCA” “Mechanism” “Head Assy” “ACI”

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Variant An identifier indicating what version of the product this is.

tbd LTO 4 full-height FC tbd LTO 4 full-height SCSI tbd LTO 4 full-height SAS

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LOAD/UNLOAD 1Bh

The LOAD/UNLOAD command allows the host to specify that a tape cartridge present in the drive is either made ready for data transfer (“loaded”) or disabled for data transfer (if Prevent Media Removal is set). It can also cause the cartridge to be ejected from the drive (“unloaded”).

Pre-execution checks

Illegal Field Reservation Deferred Error Unit Attention Diagnostic Status Media Information

If an unload is to be performed, the drive checks if the tape is currently being loaded. If it is, CHECK

CONDITION

ready).

If a load is to be performed, the drive checks to ensure that a tape cartridge is present. If not, it reports not present). If the media is currently being unloaded or ejected, it reports sense key of

Command descriptor block

0 Operation Code (1Bh) 1 Reserved (0) Immed 2 Reserved (0) 3 Reserved (0) 4 Reserved (0) Hold EOT (0) ReTen Load 5 Control

is reported with a sense key of NOT READY and additional sense of 0401h (becoming

CHECK CONDITION with a sense key of NOT READY and additional sense of 3A00h (medium

CHECK CONDITION with

NOT READY and additional sense of 0400h (cause not reportable).

76543210

CDB fields

Immed 0 The drive reports status after the command has completed.

The drive reports status when it starts the command (after any pre-execution

checks and prerequisite unloads have completed).

Hold 0 A normal load/unload will be performed.

A load will cause the cartridge to be pulled in and seated in the drive, but the tape will not be threaded.

An unload will cause the tape to be unthreaded, but the cartridge will not be ejected. In Hold position, the Cartridge Memory is accessible.

ReTen This field is ignored. Load 0 The drive performs an unload operation.

1 The drive performs a load operation.

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Load/Unload specific status

Following a successful LOAD command, CHECK CONDITION is posted to all initiators other than the initiator of the 2800h (not ready to ready transition). There is an exception to this: if a load occurs when the tape is already loaded, no

Once

UNIT ATTENTION is cleared, unsolicited positional sense is set. The sense key will be NO

SENSE

with additional sense of 0004h (BOT detected).

If an unformatted tape is inserted, the drive loads it and it behaves as if it is a blank tape.

LOAD command. The sense key is set to UNIT ATTENTION, with additional sense of

UNIT ATTENTION sense is generated.

If a cartridge with no Cartridge Memory or a failed Cartridge Memory is loaded,

CONDITION is returned with a sense key of MEDIUM ERROR, with additional sense of 5200h

CHECK

(cartridge fault).

Loading a cartridge

The drive loads an Ultrium 4, Ultrium 3 or Ultrium 2 tape automatically when it is inserted, without any host interaction. If the load is successful, media access commands are permissible (see the Media Access check).

If the tape is already loaded when a Load request is received, the tape is positioned at the beginning of the tape (as though a with additional sense of 2800h (not ready to ready transition) is not generated for other hosts.

If the tape is in the process of being loaded when the Load request is received, the drive will wait for the load to complete and, assuming the load was successful, take one of the following actions:

• If the Load was issued by the current host (that is, a previous immediate-reported load) and

completed successfully,

GOOD status is reported. No further action is taken.

• If the Load was issued by some other host (or was an autoload) and completed successfully,

CHECK CONDITION is reported, with a sense key of UNIT ATTENTION and additional sense of

2800h (not ready to ready transition).

• If the Load was issued by the current host and failed,

deferred error condition will exist for the current host.

• If the Load was issued by some other host and failed, the load will be re-attempted on behalf of

the current host.

REWIND had been sent). Unlike a “full” load, UNIT ATTENTION

CHECK CONDITION is reported, since a

Unloading a cartridge

If an unload is requested and there is a tape present in the drive (either loaded, loading or unloading):

1. Any buffered data is written to tape.

2. The tape is rewound to the physical BOM (beginning of media).

3. If medium removal is prevented,

REQUEST

4. G

and additional sense of 5302h (medium removal prevented).

OOD status is reported if the tape unloaded successfully. Otherwise, another unload operation

is initiated on behalf of the host that issued the unload request.

Following an unload, any media access commands will be rejected by the Media Access check.

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CHECK CONDITION is reported with a sense key of ILLEGAL

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• If an unload request is received while the tape is in the process of unloading (for example, as a

result of pressing the eject button), it will be queued until the unload is complete.

• If an unload request is received while there is no tape present, or if a tape is present but not

loaded and medium removal is prevented,

GOOD status is reported.

It is possible to unload and eject the cartridge by pressing the Eject button on the front panel.

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LOCATE 2Bh/92h

The LOCATE command moves the current logical position to the position specified by the command. The new position is specified by the offset from start of the media in terms of blocks. The first block (that is, BOT) is block address 0.

Any unwritten data is written to tape before the command is executed.

Pre-execution checks

Illegal Field Reservation Deferred Error Unit Attention Media Access Diagnostic Status

Command descriptor block (10-byte version):

76543210 0 Operation Code (2Bh) 1 Reserved (0) BT (0) CP (0) Immed 2 Reserved (0) 3 (MSB) 6 (LSB) 7 Reserved (0) 8 Partition (0) 9 Control

Block Address

(16-byte version):

76543210 0 Operation Code (92h) 1 Reserved (0) Dest Type Rsvd (0) CP (0) Immed 2 Reserved (0) BAM (0) 3 Partition (0) 4 (MSB)

11 (LSB) 12 14 15 Control

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Logical Identifier

Reserved (0)

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CDB fields

BT Block address Type. This field is not supported and should always be set to zero

indicating that the Block Address field represents the count of all blocks and filemarks between the beginning of the media and the current logical position.

CP Change Partition. This field is not supported and should be set to zero. Immed 0 The drive only reports status after the Locate command has completed.

The drive reports status when it starts the command and continues with the

positioning in the background.

BAM 0 This field is not supported. Block

Address

The Block Address specifies the number of blocks and filemarks between BOM and the position to be located.

Partition Not supported. Dest

type

00b Specifies that the Logical Identifier field is a logical object identifier. 01b Specifies that the Logical Identifier field is a logical file identifier.

Other values are not supported.

Logical Identifier

The specific block on tape to locate. It can be a generic block, either a record or a filemark (Dest Type = 00b) or a specific filemark on tape (Dest Type = 01b).

Locate specific status

Event Status Key Additional Sense

EOD encountered EOM encountered

Failed to read data—media error or non-fatal drive error

Early Warning EOM encountered

Data format corrupt

CHECK CONDN BLANK CHECK CHECK CONDN MEDIUM ERROR

0005h (EOD encountered). 0002h (EOT encountered). EOM bit

set.

CHECK CONDN HARDWARE ERROR

3B00h (sequential positioning error)

Early warning end of medium information is not reported for Locate commands

CHECK CONDN MEDIUM ERROR

3001h (can’t read media, unknown format)

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LOG SELECT 4Ch

The Log Select command causes log data on the drive to be reset to its default value or to be set to an initiator specific value.

Pre-execution checks

Illegal Field Reservation Deferred Error Unit Attention

Command descriptor block

76543210 0 Operation Code (4Ch) 1 Reserved (0) PCR SP (0) 2 PC Reserved (0)

3–6 Reserved (0)

7 (MSB) 8 (LSB) 9 Control

CDB fields

The following are valid combinations of values for the PCR (Parameter Code Reset), Parameter List Length and PC (Page Control) fields

Parameter List Length

PCR Parameter List

Length

1001b or 11b All the logs on the drive that can be reset are reset to their

1000b or 10b No action is taken and 0>001b or 11b Data is sent from the host and is written to the indicated logs,

Otherwise additional sense of 2400h (Invalid Field in CDB).

PCR 0 Parameter Code Reset. The function performed is defined by the PC field. SP 0 The Save Page (SP) flag is not supported and must be set to 0. PC The Page Control field defines the type of parameter values to be selected:

CHECK CONDITION status is returned, the sense key is set to ILLEGAL REQUEST with

00b

No operation is performed. The Parameter List Length must be zero. If it is not,

check condition invalid field in CDB is set.

10b 01b The drive will clear logs as specified by the parameter data. 11b The drive will clear all of its internal logs.

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PC Result

default values.

GOOD status is returned.

provided those logs are writable.

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Parameter List Length

0 No data is to be transferred. This is not considered an error.

>0 Specifies how many bytes of parameter data are to be sent. The data transferred

will consist of zero or more 4-byte log page headers with the page length in those headers set to zero. For each log page header received, the drive clears the associated log.

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LOG SENSE 4Dh

LOG SENSE allows the host to read the drive’s logs. A single log is returned with each invocation of LOG SENSE.

Pre-execution checks

Illegal Field Deferred Error Unit Attention

The Page Code must match one of the supported log page codes. If it does not, then CHECK

CONDITION

Command descriptor block

0 Operation Code (4Dh) 1 Reserved (0) PPC (0) SP (0) 2 PC Page Code 3 4 5 6 7 (MSB) 8 (LSB) 9 Control

status is reported. Sense data will be as described in the Illegal Field Checks.

76543210

Reserved (0)

Parameter Pointer

Allocation Length

CDB fields

PC The Page Control field defines the type of log parameter to be returned:

00b Current Threshold Values—any parameters in the log that are counters

contain the maximum value that they can count to.

01b Current Cumulative Values—any parameters in the log that are counters

contain their current counts.

NOTE: Counts are reset to their default cumulative values (see below)

following a power-on, reset or bus device reset. Media related counts are

also reset following a load. 10b Default Threshold Values—same as the Current Threshold Values 11b Default Cumulative Values—any parameters in the log that are counters

contain the initial values of those counters (set at power-on, reset, bus

device reset and, in the case of media logs, load).

The PC field has no effect on the data returned when the selected log contains event or trace codes rather than counts.

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Page Code The Page Code field identifies which log page is being requested by the host. See

Parameter Pointer

Allocation Length

Log page format

All log pages except Page 0 consist of a page code header followed by a number of parameters. The page header has the following format:

76543210 0 Page Code 1 Reserved (0) 2 (MSB) 3 (LSB)

The Page Code specifies which Log page is being returned. The Page Length indicates the number of additional bytes in the parameters.

page 77 for the list of valid page codes.

0 All parameters are returned. n Parameter data of a specified log page is returned in ascending order

beginning from this code. If this code is larger than the largest parameter in the page, the drive will return

CHECK CONDITION with additional sense of

2400h (Invalid Field In CDB).

The Allocation Length field specifies the maximum number of bytes of data that should be returned to the host. The drive will return the entire log or Allocation Length bytes, whichever is the lesser.

Page Length

For the

Log Select command only, the four bytes shown above are sent for each log page to be

cleared. The Page Length field should be set to zero.

For the

Log Sense command one or more parameters is sent. See the actual page descriptions above

for more information. Note that all the parameters for a particular page must be sent. Each parameter has the following format:

7 6 543210

0 (MSB)

Parameter Code

1 (LSB) 2 DU (0) DS (1) TSD (0) ETC (0) TMC(0) Rsvd (0) LP (0) 3 Parameter Length (n−3) 4 (MSB) n (LSB)

Parameter Bytes

Parameter Code A two-byte value that uniquely identifies the parameter within the log. DU, TSD, ETC, TMC

and LP

Commands76

0 Must be zero. For a full description of these fields refer to the SCSI-2

standard.

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DS 1 Must be 1, indicating that drive will maintain the saving of data itself.

Note that the host must set the SP bit to 1 in a otherwise a

Parameter Length The length of Parameter Bytes in bytes. Parameter Bytes The actual parameter data.

Supported Log Pages page

This SCSI log may be recovered using a Log Sense command with the PC field set to anything and the Page Code field set to 00h. The page lists the page codes of other logs supported by the drive. It can neither be reset nor written.

The page has the following format:

76543210 0 Reserved (0) Page Code (00h) 1 Reserved (0) 2 (MSB) 3 (LSB) 4 Supported Pages (00h) 5 Write Error Counters (02h) 6 Read Error Counters (03h) 7 Sequential Access Device Log (0Ch) 8 Temperature Log (0Dh) 9 DTD Status Log (11h)

10 TapeAlert Response Log (12h) 11 Requested Recovery Log (13h) 12 Protocol-Specific Log (18h)—FC and SAS devices only 13 TapeAlert Log (2Eh) 14 Tape Usage Log (30h) 15 Tape Capacity Log (31h) 16 Data Compression Log (32h) 17 Device Wellness Log (33h) 18 Performance Log (34h) 19 Device Status Log (3Eh)

a. May not be present in all firmware versions.

LOG SELECT command,

CHECK CONDITION will result.

Page Length (10h)

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Write Error Counters log page

The Write Error Counters log is page 02h. The Page Length is 38h. There are seven parameters, 0 through 6. All fields are four bytes long.

All these counters are updated when the data set is physically written. They relate to the current tape and are cleared when the tape is unloaded.

Parm. Definition Description

0 Errors corrected without substantial delay Total number of errors corrected without delay 1 Errors corrected with possible delays Total number of errors corrected using retries 2 Total Sum of parameters 3 and 6 3 Total errors corrected The number of data sets that needed to be

4 Total times error correction processed Number of CCQ sets rewritten 5 Total data sets processed The total number of data sets written 6 Total uncorrected errors The number of data sets that could not be

This data can be reset to zero, but not written.

Read Error Counters log page

The Read Error Counters log is page 03h. The Page Length is 38h. There are seven parameters, 0 through 6. All fields are four bytes long.

rewritten

written

All these counters are updated when the data set is physically read. They relate to the current tape and are cleared when the tape is unloaded.

Parm. Definition Description

after a read retry 4 Total times error correction processed Number of times C2 correction is invoked 5 Total bytes processed The total number of data sets read 6 Total uncorrected errors The number of data sets that could not be read

after retries

This data can be reset to zero, but not written.

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Sequential Access Device log page

The Sequential Access Device Log page is page 0Ch. The Page Length is 40h. Five parameters are supported, all eight bytes long. With the exception of 0100h (cleaning required), they are updated when a data set is logically written and cleared at the start of tape load; the values of each parameter relate to the current tape.

Parm. Description

0001h The number of data bytes received from application clients during write command

operations. This is the number of bytes transferred over SCSI, before compression.

0002h The number of data bytes written to the media as a result of write command operations,

not counting the overhead from ECC and formatting. This is the number of data bytes transferred to media, after compression.

0003h The number of data bytes read from the media during read command operations, not

counting the overhead from ECC and formatting. This is the number of data bytes transferred from media with compression.

0004h The number of data bytes transferred to the initiator or initiators during read command

operations. This is the number of bytes transferred over SCSI, after decompression.

0100h Cleaning required, a non-volatile cleaning indication.

A non-zero value of parameter 0100H (cleaning required) relates to the drive It indicates that a condition requiring cleaning has been detected and a subsequent cleaning cycle has not yet been completed. The parameter is updated asynchronously. It persists across hard resets and power cycles, and is cleared when a cleaning cycle is performed.

Temperature log page

The Temperature Log page is page 0Dh. The following parameters are supported:

Parm. Description

0h The current temperature of the drive in ºC (binary value). If the temperature is less than 0, 0

is reported. If the temperature sensor is not functioning properly, FFh is reported.

1h The maximum temperature in ºC (binary value) at which the drive can operate continuously

without degrading reliability and operation. This parameter is not supported so FFh is returned.

76543210 0 Page Code (0Dh) 1 Reserved (0) 2 (MSB) 3 (LSB) 4 (MSB) 5 (LSB) 6 DU (0) DS (1) TSD (0) ETC (0) TMC (0) LBIN (1) LP (1)

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Page Length (0Ch)

Parameter Code (0000h)

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76543210 7 Parameter Length (2h) 8 Reserved (0) 9 Temperature (ºC)

10 (MSB) 11 (LSB) 12 DU (0) DS (1) TSD (0) ETC (0) TMC (0) LBIN (1) LP (1) 13 Parameter Length (2h) 14 Reserved 15 Reference Temperature (ºC)

DTD Status log page

The Data Transfer Device (DTD) Status Log page is page 11h. The following parameters are supported:

Parm. Description

0000h Very High Frequency data 0001h Very High Frequency polling delay

0100h–01FFh DTD Primary Port status

Parameter Code (0001h)

Very high frequency data (VHF)

76543210 0 (MSB) 1 (LSB) 2 DU (0) DS (1) TSD (0) ETC (0) TMC (0) LBIN (1) LP (1) 3 Parameter Length (4h) 4 PAMR HIU MAcc Cmpr WrtP CRqst CRqrd DInit 5 InXtm Rsvd (0) RAA MPrsnt Rsvd (0) MStd MThrd DAcc 6 Tape Motion Status 7 Reserved (0) RRqst IntfC TAFC

PAMR Prevent/Allow Medium Removal bit HIU Host Initiated Unload bit MAcc If set, the MAM is accessible. MPrsnt must be set as well. Cmpr Compress bit. If set, the DTD currently has data compression enabled. WrtP Write Protect bit. If set, the media in the DTD is physically write-protected. Only

valid if MPrsnt is set.

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Parameter Code (0000h)

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CRqst Clean Requested bit CRqrd Cleaning Required. If set, head cleaning must be performed before normal data

operations are possible. This takes priority over CRqst, and both may be set at the same time.

DInit DTD Initialized. When set, the data returned by the VHF parameter data is valid. InXtn In Transition. If 0, the DTD is in the state reflected by the rest of byte 5 and is not

attempting to leave this state. This bit must be 0 if RRqst is set. RAA Robotic Access Allowed. If set, robotic media access to the DTD is allowed. MPrsnt Media Present bit (hardware sensor) MStd Media Seated. If set, the tape is mechanically seated, that it physical loading is

complete. Otherwise the tape is still threading.

MThrd Media Threaded DAcc Data Accessible. If set, the DTD has finished processing a load operation. The bit is

cleared to 0 at the beginning of the next unload operation.

Tape Motion Status

RRqst Recovery Requested. Set to 1 as long as a recovery procedure is available. In these

IntfC Interface Changed. If set, the interface status has changed since the last time this

TAFC If set, at least one TapeAlert Flag had Changed since the last time the TapeAlert

00h 01h 02h 03h 04h 05h 06h 07h

08h 09h–7Fh 80h–FFh

circumstances, InXtn must be 0.

page was retrieved. It is cleared to 0 when the page is retrieved for the initiator.

flags were retrieved.

No tape motion Cleaning operation in progress Tape being loaded Tape being unloaded Tape in motion Reading Writing Locating Rewinding Reserved Vendor unique

Very high frequency polling delay

76543210 0 (MSB) 1 (LSB) 2 DU (0) DS (1) TSD (0) ETC (0) TMC (0) LBIN (1) LP (1) 3 Parameter Length (2h) 4 (MSB) 5 (LSB)

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Parameter Code (0001h)

VHF Polling Delay

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The VHF Polling Delay is 16 milliseconds.

DTD primary port status

SAS drives

76543210 0 (MSB) 1 (LSB) 2 DU (0) DS (1) TSD (0) ETC (0) TMC (0) LBIN (1) LP (1) 3 Parameter Length (4h) 4 Negotiated Physical Link Rate Reserved (0) Signal PIC 5 (MSB) 7 (LSB)

Fibre Channel

Por t 0

76543210 0 (MSB) 1 (LSB) 2 DU (0) DS (1) TSD (0) ETC (0) TMC (0) LBIN (1) LP (1) 3 Parameter Length (8h) 4 CurrTop Current Speed LC Conflict Signal PIC 5 (MSB) 7 (LSB)

8–1

11 Rsvd Current FC_AL Loop ID

Parameter Code

0101h (Port 0) or 0102h (Port 1)

Current Hashed SAS Address

Parameter Code (0101h)

Current N_Port ID

Reserved (0)

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Port 1

76543210 0 (MSB) 1 (LSB)

Parameter Code (0102h)

2 DU (0) DS (1) TSD (0) ETC (0) TMC (0) LBIN (1) LP (1) 3 Parameter Length (8h) 4 CrrTop Current Speed LC Conflict Signal PIC 5 (MSB)

Current N_Por_ID

7 (LSB)

8–1

Reserved (0)

11 Rsvd Current FC_AL Loop ID

CurrTop Current Topology. Ignored when the PIC bit is set to zero.

0 The DT device primary port is currently operating in arbitrated loop mode. 1 The DT device primary port is currently operating in point-to-point mode.

Current Speed The bit rate at which the DT device primary port is currently operating. The

field is ignored when the PIC bit is set to zero. Valid values are:

000b 001b 010b 011b

100b–111b

1 Gbps 2 Gbps 4 Gbps 8 Gbps reserved

LC Login Complete

0 A login has not successfully completed through the PRLI phase on the DT

device primary port.

1 At least one initiator port has completed process login (PRLI) with the DT

device on the DT device primary port.

Conflict 0 There is no AL_PA conflict.

1 Another device has the required Hard AL_PA, or no AL_PA is available for

the DT device primary port.

Signal 0 A signal is not detected.

1 A signal is detected at the DT device primary port.

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PIC Port Initialization Complete

0 The DT device primary port is not in the

synchronized, or has not successfully completed the most recent Loop Initialization Process.

1 The FC_Port state machine is in the

primary port is operating in point-to-point topology, or the most recent Loop Initialization Process has completed successfully

Current N_Port ID The 24-bit N_Port ID that is assigned to the DT device primary port. The field is

ignored when the PIC bit is set to zero.

Current FC_AL Loop IDThe loop identifier that is assigned to the DT device primary port. The field is

ignored when the PIC bit is set to zero or when the CurrTop bit is set to one.

TapeAlert Response log page

The TapeAlert Response log page is page 12h. There is only 1 parameter, which contains 64 flags. For a list of supported flags, see the ”TapeAlert log page” on page 87.

7 6543 210 0 Page Code (12h) 1 Reserved 90) 2 (MSB) 3 (LSB) 4 (MSB) 5 (LSB) 6 DU (1) DS (1) TSD (1) ETC (0) TMC (0) LBIN (1) LP (1) 7 Parameter Length (08h) 8 Flag 01h Flag 02h Flag 03h Flag 04h Flag 05h Flag 06h Flag 07h Flag 08h 9 Flag 09h Flag 0Ah Flag 0Bh Flag 0Ch Flag 0Dh Flag 0Eh Flag 0Fh Flag 10h

10 Flag 11h Flag 12h Flag 13h Flag 14h Flag 15h Flag 16h Flag 17h Flag 18h 11 Flag 19h Flag 1Ah Flag 1Bh Flag 1Ch Flag 1Dh Flag 1Eh Flag 1Fh Flag 20h 12 Flag 21h Flag 22h Flag 23h Flag 24h Flag 25h Flag 26h Flag 27h Flag 28h 13 Flag 29h Flag 2Ah Flag 2Bh Flag 2Ch Flag 2Dh Flag 2Eh Flag 2FH Flag 30h 14 Flag 31h Flag 32h Flag 33h Flag 34h Flag 35h Flag 36h Flag 37h Flag 38h 15 Flag 39h Flag 3Ah Flag 3Bh Flag 3Ch Flag 3Dh Flag 3Eh Flag 3Fh Flag 40h

ACTIVE state and is not

ACTIVE state and the DT device

Page Length (000Ch)

Parameter Code (0000h)

Each flag is either zero to indicate the corresponding condition is deactivated or one to indicate that the corresponding condition has been activated.

Flags are not cleared when the log is read. The log is cleared at power-on or on a reset condition. Specific flags may be cleared when corrective action has removed the condition that caused the flag to be activated.

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Requested Recovery log page

The Requested Recovery log page is 13h. One parameter is supported:

Parameter Description

0000h Recovery procedures

0001h–FFFFh Reserved

Recovery procedures

76543210 0 (MSB) 1 (LSB) 2 DU (1) DS (1) TSD (1) ETC (0) TMC (0) LBIN (1) LP (1) 3 Parameter Length (1h) 4 Recovery not requested (0)

Parameter Code (0000h)

Protocol-Specific Log page (SAS drives only)

76543210 0 Page Code (18h) 1 Reserved (0) 2 (MSB) 3 (LSB) 4

... ... m

Protocol-Specific Log Parameter 0

Protocol-Specific Log Parameter 1

Page Length (70h)

Protocol-specific log parameters

7654 3 2 1 0 0 (MSB) 1 (LSB) 2 DU (0) DS (0) TSD (0) ETC (0) TMC(0) LBIN (1) LP (1) 3 Parameter Length (34h) 4 Reserved (0) Protocol Identifier (6h)

5–6 Reserved (0)

7 Number of Phys (1)

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Parameter Code [0,1]

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7654 3 2 1 0 8 Reserved (0) 9 PHY Identifier [0,1]

10–11 Reserved (0)

12 Rsvd (0) Attached Device Type Reserved (0) 13 Reserved (0) Negotiated Physical Link Rate 14

Reserved (0)

16 (MSB) 23 (LSB) 24 (MSB)

Attached SAS Address

Attached

SSP Initiator

Port

Attached

SSP Target

Port

SAS Address

Attached

STP Init iator

Port

Attached

STP Target

Port

Attached

SMP Initiator

Port

Attached

SMP Target

Port

Rsvd (0)

31 (LSB) 32 Attached PHY Identifier

33–39 Reserved (0)

40 (MSB) 43 (LSB) 44 (MSB)

Invalid DWORD Count

Running Disparity Error Count

47 (LSB) 48 (MSB) 51 (LSB) 52 (MSB) 55 (LSB)

Loss of DWORD Synchronization Count

PHY Reset Problem Counts

Parameter Code The relative port identifier PHY Identifier The same value as the Parameter Code Negotiated

Physical Link Rate89 Invalid DWORD

1.5 Gbps

3.0 Gbps

Number of invalid DWORDS received outside of PHY reset sequences.

Count Running Disparity

Error Count

Commands86

Number of DWORDS containing running disparity errors received outside the PHY reset sequences.

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Loss of DWORD synchronization

PHY Reset Problem Count

NOTE: The counters are the only fields affected by a LOG SELECT command or the value of the PC

field in the

LOG SENSE command.

TapeAlert log page

NOTE: Reading the TapeAlert log clears the flags, as stipulated in the TapeAlert specification.

The TapeAlert log page is page 2Eh. There are 64 parameters numbered from 1 through 64. Only parameters 1–18, 20–23, 29–39 and 55–60 have definitions for tape drives without attached loaders. The remaining parameters are always zero.

The Parameter Control Byte value for each parameter is 40h.

All parameters are one byte long. Each parameter is either zero to indicate the corresponding condition has not occurred or one to indicate that the corresponding condition has occurred. All log parameters are cleared when the log is read. The Log is also cleared at power on, on a reset condition and by a removed the condition that caused the flag to be set.

Number of times the PHY restarted the link reset sequence because it lost DWORD synchronization.

Number of times the PHY did not obtain DWORD synchronization during the final SAS speed negotiation window.

Log Select command. Specific flags may be cleared when corrective action has

The supported parameters are as follows. The Set column indicates if the flag can be set by drives. The other flags are supported but never set.

Parameter Description Type Set

1 Read Warning

2 Write Warning Warning 3 Hard Error Warning 4 Media Critical  5 Read Failure Critical 6 Write Failure Critical 7 Media Life Warning 8 Not Data Grade Warning 9 Write-Protect Critical

10 No Removal Information  11 Cleaning Media Information  12 Unsupported Format Information  13 Recoverable Mechanical Cartridge Failure Critical  14 Unrecoverable Mechanical Cartridge Failure Critical

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Parameter Description Type Set

15 Memory Chip in Cartridge Failure Warning  16 Forced Eject Critical  17 Read-Only Format Warning 18 Tape Directory Corrupted Warning 19 Nearing Media Life Information  20 Clean Now Critical  21 Clean Periodic Warning 22 Expired Cleaning Media Critical 23 Invalid Cleaning Cartridge Critical  24 Retension Requested Warning 25 Dual-port Interface Error Warning 26 Cooling Fan Failure Warning 27 Power Supply Failure Warning 28 Power Consumption Warning 29 Drive Maintenance Warning 30 Hardware A Critical 31 Hardware B Critical  32 Interface Warning 33 Eject Media Critical 34 Download Fault Warning  35 Drive Humidity Warning 36 Drive Temperature Warning 37 Drive Voltage Warning 38 Predictive Failure Critical 39 Diagnostics Required Warning 50 Lost Statistics Warning 51 Tape Directory Invalid at Unload Warning  52 Tape System Area Write Failure Critical 53 Tape System Area Read Failure Critical 54 No Start of Data Critical 55 Loading Failure Critical 56 Unrecoverable load Failure Critical  57 Automation Interface Failure Critical 58 Firmware Failure Warning 59 WORM medium — integrity check failed Warning  60 WORM medium — overwrite attempted Warning 



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Tape Usage log page

The Tape Usage log page code is 30h. There are nine parameters. These are all read directly from the LTO-CM Tape Usage Log.

This data relates to the current tape and can be neither reset nor written.

Parm. Description Length Updated When

1 Thread Count 4 Tape threaded 2 Total Data Sets Written 8 Data set physically written 3 Total Write Retries 4 Data set physically written 4 Total Unrecovered Write Errors 2 Data set physically written 5 Total Suspended Writes 2 Data set physically written 6 Total Fatal Suspended Writes 2 Data set physically written 7 Total Data Sets Read 8 Data set physically written 8 Total Read Retries 4 Data set physically written 9 Total Unrecovered Read Errors 2 Data set physically written

Tape Capacity log page

The Tape Capacity log page code is 31h. The Page Length is 20h. There are four parameters, 1 through 4. Parameters 2 and 4 are not supported and are returned as zero. All parameters are 4 bytes long. All parameters are in megabytes (1,048,576 bytes) and assume no compression. This data relates to the current tape and can be neither reset nor written.

The supported parameters are as follows:

Parm. Description Length Updated When

1 Main Partition Remaining Capacity 4 Data set physically written 2 Alternate Partition Remaining Capacity 4 n/a 3 Main Partition Maximum Capacity 4 If Set Capacity succeeds 4 Alternate Partition Maximum Capacity 4 n/a

Data Compression log page

The Data Compression log page code is 32h and the page length is 4Ch. There are ten parameters, 0 through 9. Parameters 0 and 1 are two bytes long. Parameters 2 through 9 are each 4 bytes long.

The supported fields are listed below. Parameters 2 through 9 occur as pairs that represent a large number of bytes transferred. The first four-byte parameter represents the number of whole megabytes transferred, rounded to the nearest megabyte. The second four-byte parameter represents the difference between this number of megabytes and the actual number of bytes. This may be a signed quantity.

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This data relates to the current tape and is cleared at the start of tape load. It may not be written.

Parameter Description Length Updated When

0 Read compression ratio X 100 2 Data set logically read 1 Write compression ratio X 100 2 Data set logically written 2 Megabytes transferred to host 4 Data set logically read 3 Bytes transferred to host 4 Data set logically read 4 Megabytes read from tape 4 Data set logically read 5 Bytes read from tape 4 Data set logically read 6 Megabytes transferred from host 4 Data set logically written 7 Bytes transferred from host 4 Data set logically written 8 Megabytes written to tape 4 Data set logically written 9 Bytes written to tape 4 Data set logically written

Device Wellness Log page

The Device Wellness Log page has page code 33h and consists of a FIFO parameter code list of the last 16 drive error conditions caused by various sense keys.

However, to enable connectivity to the peripheral management tools only, the page structure has been implemented, but all parameter values returned by the drive will be zero.

Commands90

7 6 54 3 210 0 Page Code (33h) 1 Reserved (0) 2 (MSB) 3 (LSB)

4+(16

5+(16 6+(16 7+(16

8+(16 11+(16 12+(16 15+(16 16+(16 17+(16 18+(16 19+(16

)

) DU (0) DS (1) TSD (1) ETC (0) TMC(0) LBIN (0) LP (1)

) Reserved (0)

) (MSB)

) (LSB)

) (MSB)

) (LSB)

) Sense Key)

) Additional Sense Code

) Addistional Sense Qualifier

) Additional Error Information

Parameter Code n (n = 0 through 15

Page Length (0100h)

Time Stamp

Media Signature

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Performance Data log page

The Performance Data log page is 34h. This log is intended to report data of interest to a user/application on how efficiently the drive is being used.

Parameter Description Length Updated

0 Repositions per 100 MB 2 After each 100 MB has been physically written 1 Data rate into buffer 2 After each data set has been logically written 2 Maximum data rate 2 After each data set has been logically written 3 Current data rate 2 After each data set has been logically written 4 Native data rate 2 Fixed

The Parameter Control Byte is 60h for all the parameters.

All the parameters relate to the current tape. They are all cleared at the start of tape load, except Parameter 4, which is never cleared. All data will be reset when the log page is reset. The parameters are as follows.

Repositions per 100 MB

Data rate into buffer

Maximum data rate

Current data rate

Native data rate The native rate (that is, without using compression) at which the drive writes data

Number of tape direction changes per 100 MB written. The higher the figure the more wear occurs.

Rate at which data is entering the buffer (after data compression), given in units of 100 KB/s. This is the true ‘tape’ data rate.

Given the compressibility of the data that has been sent to the drive, this is the maximum data rate that could be achieved, given in units of 100 KB/s. The figure is calculated based on the compressibility of each dataset received, and datasets that have a compressibility greater than the compression bandwidth of the drive will be ‘capped’.

Rate at which data is being accepted by the drive before compression, given in units of 100 KB/s.

to tape, given in units of 100 KB/s:

Drive Value Native Data Rate

LTO 4 04B0h 120 MB/s NOTE: These figures are for native

Device Status log page

The Device Status log page is 3Eh, with a page length of 28h. PCB = Parameter Control Byte.

Parameter Description Length Updated PCB

0 Device Type 4 Obsolete. Set to all zeros. 40h 1 Device Status Bits 4 Used to provide remote status of selected

media types and will vary when earlier format media is loaded

40h monitoring points on the drive. See below for the format.

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Parameter Description Length Updated PCB

2 Total Number of Loads 4 Number of loads/unloads over the life of the

60h

device.

3 Cleaning Cartridge

Status

4 Accumulated number of uses of the last

cleaning cartridge. Updated after the tape is

40h

loaded and a cleaning event attempted. If there is no value, FFFFFFFFh is returned.

4 Product Number 4 Unique number that identifies the product 40h

Device Status Bits

The parameter has the following format:

76543210 0 Reserved (0) CRQ CR ECT 1 Reserved (0) Temperature Device Status 2 Reserved (0) Medium Status 5 Reserved (0)

CRQ Cleaning Required flag CR Cleaning Requested flag ECT Exhausted Cleaning Tape flag Temperature 00b

Field not supported Temperature OK

01b

Temperature degraded

10b

Temperature failed

11b

Device Status The overall status of the drive:

Field not supported

00b

Device status OK

01b

Device status degraded

10b

Device status failed

11b

Medium Status The overall status of the tape cartridge:

Field not supported

00b

Medium status OK

01b

Medium status degraded

10b

Medium status failed

11b

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MODE SELECT 15h/55h

MODE SELECT is used to send configuration data to the drive. Both 6-byte and 10-byte versions of the command are supported.

The Mode Select parameter list is transferred from the host to the drive during the data-out phase. It contains zero or more bytes of information. If any information is sent, it should consist of a Mode Parameter Header followed by zero or more mode select pages. Internal parameters are set according to the values specified in the header and pages. Fields in the parameter list are checked and the operation will terminate if an error is found.

NOTE: The drive does not check that the parameter list is correct before modifying internal

parameters. The list is checked as the operation proceeds, so if there is an error in the list, all parameters up to that point will be set to their new values, but the parameter in error and later parameters will not be updated.

Pre-execution checks

Illegal Field Reservation Deferred Error Unit Attention

NOTE: Failure to flush write-behind data will be reported as a Deferred Error.

The parameter list length must be such that only “entire” parts of a parameter list are sent. It is illegal to send a partial mode parameter header, a partial mode block descriptor or a partial mode page. If this happens, then The additional sense is set to 1A00h (parameter list length error).

CHECK CONDITION status is reported. The sense key is set to ILLEGAL REQUEST.

Extra checks may be performed on the data, see the descriptions for the parameter list for more details.

Command descriptor block

6-Byte version

76543210 0 Operation Code (15h) 1 Reserved (0) PF Reserved (0) SP (0)

2–3 Reserved (0)

4 Parameter List Length 5 Control

10-byte version

76543210 0 Operation Code (55h)

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76543210

1 Reserved (0) PF Reserved (0) SP (0)

2–6 Reserved (0)

7 (MSB)

Parameter List Length

8 (LSB) 9 Control

CDB fields

PF Page Format

0The

MODE SELECT parameter data is not SCSI-2 mode page compatible. Only

the parameter header and block descriptor may be sent.

1 The parameter data is SCSI-2 mode-page compatible.

SP Save Pages

0 This bit is not supported and must be zero.

Parame ter List Length

0 No data is transferred.

>0 The length in bytes of the

MODE SELECT parameter list to be transferred.

Specific status

Following a successful Mode Select command, Unit Attention status is posted to all initiators other than the initiator of the Mode Select command. The sense key is set to sense is set to 2A01h (mode parameters changed).

UNIT ATTENTION. Additional

Mode parameter pages

Mode data is recovered from the drive by means of a MODE SENSE command. After modification, it is returned to the drive via a

SENSE

and return whatever MODE SELECT data suits them into the drive.

Mode page representation

Certain conventions are used in the following Mode Parameter pages in order to describe the nature of the parameters. Most parameters are given by name, followed by a number in brackets. The brackets have the following meanings:

Square brackets [ ] Square brackets indicate that the parameter may be modified. The number

inside the brackets is the default value for the field—in other words, the power-up or reset value.

• M

Commands94

MODE SELECT command. In real-life, many hosts do not use MODE

ODE SELECT may modify this value by sending the page with a new value

in the field.

ODE SENSE (current values) will return the current value of the parameter. ODE SENSE (default values) will return the value in brackets []. ODE SENSE (changeable values) will return a value of all ones.

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Round brackets ( ) Round brackets indicate that the parameter is fixed. The number inside the

Mode data format

Mode data consists of a 4-byte header, optionally followed by block descriptor and Mode Parameter pages:

76543210 1 (MSB) 3 (LSB) 4 (MSB)

11 (LSB) 12 (MSB)

n (LSB)

Mode parameter pages

HP LTO Ultrium drives support the following pages:

brackets is the fixed value for the field.

• M

ODE SELECT must set the parameter to this value, otherwise CHECK

CONDITION

will be reported with a sense key of ILLEGAL REQUEST.

• MODE SENSE (default values) will return the fixed value.

• M

ODE SENSE (changeable values) will return a value of all zeros.

Mode Parameter Header

Mode Block Descriptor

Mode Parameter Pages

• 01h “Read-Write Error Recovery mode page” on page 98

• 02h “Disconnect-Reconnect page” on page 99

• 0Ah “Control mode page” on page 102

• 0Fh “Data Compression Characteristics page” on page 103

• 10h “Device Configuration page” on page 104

• 11h “Medium Partitions mode page” on page 106

• 18h FC drives: “Protocol-Specific Logical Unit mode page (FC drives)” on page 107

• 18h SCSI drives: “Protocol-Specific Logical Unit mode page (SCSI drives)” on page 108

• 18h SAS drives: “Protocol-Specific Logical Unit mode page (SAS drives)” on page 108

• 19h FC drives: “Protocol-Specific Port mode page (FC drives)” on page 108

• 19h SCSI drives: “Protocol-Specific Port mode page (SCSI drives)” on page 112

• 19h SAS drives “Protocol-Specific Port mode page (SAS drives)” on page 116

• 1Ah “Power Condition mode page” on page 119

• 1Ch “Information Exceptions mode page” on page 120

• 1Dh “Medium Configuration mode page” on page 121

• 3Bh “Serial Number Override vendor-unique mode page” on page 122

• 3Ch “Device Time mode page” on page 123

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• 3Dh “Extended Reset vendor-unique mode page” on page 125

• 3Fh OBDR FW variants only: “CD-ROM Emulation/Disaster Recovery mode page” on

page 126

• Return all pages (page 3Fh) — for

MODE SENSE only

Mode parameter header

The Mode Parameter header must always be sent at the start of Mode Select data. It is always returned at the start of Mode Sense data.

6-byte header

The 6-byte Mode Parameter header has the following format:

76543210 0 Mode Data Length 1 Medium Type [00h or 01h if WORM media is loaded

or 80h if in CD-ROM mode]

2 WP Buffered Mode [001b] Speed (0) 3 Block Descriptor Length

10-byte header

The 10-byte Mode Parameter header has the following format:

76543210 0 (MSB) 1 (LSB) 2 Medium Type [00h or 01h if WORM media is loaded (FC and SCSI drives)

3 WP Buffered Mode [001b] Speed (0) 4 5 6 (MSB) 7 (LSB)

Mode Data Length

or 80h if in CD-ROM mode]

Reserved (0)

Block Descriptor Length

Header fields

Mode Data Length

Commands96

MODE SELECT: MODE SENSE:

Mode Data Length field must be zero. Mode Data Length field is set to the number of bytes of data

available to return excluding itself (in other words, the number of actual bytes available is mode data length + 1 for 6-byte

SENSE

or +2 for 10-byte MODE SENSE).

MODE

NOTE: The actual amount returned may be truncated to the

allocation length for the command.

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Medium Type 00h The usual medium type when the drive is in normal tape drive mode.

01h WORM media is loaded. 80h The tape drive is in CD-ROM emulation mode for OBDR.

WP Write Protect. Ignored for

ODE SENSE: The tape is write-enabled

ODE SENSE: The tape is write-protected

Buffered Mode 0 The drive will not report

MODE SELECT.

GOOD status on Write and Write Filemarks

commands until all data (blocks and filemarks) has been successfully written to tape.

1 The drive will report

GOOD status for Write and Write Filemarks commands

as soon as all the data or marks specified in the command have been transferred to the data buffer. Data for multiple commands from different initiators may be buffered. This is the default value.

NOTE: It is strongly recommended that this field is set to 1, otherwise

there will be significant performance penalties. A method of flushing the buffer to tape without changing logical position is available with the

Write Filemarks command.

2 The drive will report

GOOD status for Write and Write Filemarks commands

as soon as all the data or marks specified in the command have been transferred to the data buffer and all buffered data from different initiators has been successfully written to the tape.

Speed 0 The Speed field is not used and should be zero. Block Descriptor

Length

Only the values 0 and 8 are valid. Any value other than 0 or 8,

CONDITION

status is reported. See the Parameter List check for details of the

CHECK

sense data generated.

0 No block descriptor is being transferred. 8 The Mode Parameter header must be followed by the 8-byte block

descriptor described in the next section.

Mode block descriptor

The format of the Mode Parameter block descriptor is as follows:

76543210 0 Density Code 1 (MSB) 3 (LSB) 4 Reserved (0) 5 (MSB) 7 (LSB)

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Number of Blocks (0)

Block Length [0 or 800h]

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Mode Parameter block descriptor fields

Density Code This specifies the format of the media loaded in the drive. See “REPORT DENSITY

SUPPORT 44h” on page 175 for details.

Block Length This indicates the size of fixed blocks for fixed mode

also used in the decision process on whether to report an illegal length record on reads.

00h The default value when the drive is in normal tape drive mode.

800h The tape drive is in CD-ROM emulation mode for OBDR.

Read-Write Error Recovery mode page

The Read-Write Error Recovery mode page has the following format:

7 6 543210 0 PS (0) Rsvd (0) Page Code {01h} 1 Additional Page Length {0Ah} 2 Reserved (0) TB (0) Res (0) EER (1) PER [0] DTE (0) DCR (0) 3 Read Retry Count

4–7 Reserved (0)

8 Write Retry Count

9–11 Reserved (0)

Read and Write commands. It is

Read-Write Error Recovery page fields

TB Transfer Block

0 Always set to 0, meaning that an unrecoverable data block will not be

transferred to the host.

EER Enable Early Recovery

1 The drive should attempt error correction before performing retries.

PER Post Error. Although this bit is changeable, the drive’s internal behavior always

corresponds to PER=0.

0 The drive does not report

DTE bit must also be zero.

1 The drive reports

DTE Disable Transfer on Error

0 Always set to 0, meaning that the drive will not terminate the transfer for

errors recovered within the limits established by the read-write error parameters.

DCR Disable Correction

0 Always set to 0, meaning that the use of error correction codes for error

recovery is allowed.

Commands98

CHECK CONDITION for recovered errors.

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CHECK CONDITION for recovered errors. The

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Read Retry Count The number of times the drive will attempt its recovery algorithm during a read

operation before reporting an unrecoverable error.

0 The drive will not use its recovery algorithm during read operations.

15h The drive will attempt 21 retries.

Write Retry Count The number of times the drive will attempt its recovery algorithm during a write

operation before reporting an unrecoverable error.

0 The drive will not use its recovery algorithm during read operations.

0Ah The value for all LTO Ultrium drives, giving 10 retries.

Disconnect-Reconnect page

FC drives

The Disconnect-Reconnect page has the following format for FC drives:

7 6 543210 0 PS (0) Rsvd (0) Page Code {02h} 1 Additional Page Length {0Eh} 2 Buffer Full Ratio (0) 3 Buffer Empty Ratio (0) 4 (MSB) 5 (LSB) 6 (MSB) 7 (LSB) 8 (MSB) 9 (LSB)

10 (MSB) 11 (LSB) 12 EMDP (0) FAA [1] FAB (1) FAC (1) Reserved (0)

13–15 Reserved (0)

Bus Inactivity Limit (0)

Disconnect Time Limit [0]

Connect Time Limit (0)

Maximum Burst Size [0]

Disconnect-Reconnect page fields

Buffer Full Ratio 0 Buffer management is controlled by the drive, so this should always be

zero.

Connect Time Limit 0 Buffer management is controlled by the drive, so this should always be

zero.

Bus Inactivity Limit 0 This parameter is not supported and should be zero. Disconnect Time

Limit Connect Time Limit 0 This parameter is not supported and should be zero.

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0 This parameter is not supported and should be zero.

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Maximum Burst Size

EMDP 0 Enable Modify Data Pointers is not facilitated by the drive. The drive will

FAA This bit, together with FAB and FAC, indicate whether the drive will use

FAB 1 The drive will use fairness when arbitrating to send FCP_XFER_RDY

FAC 1 The drive will use fairness when arbitrating to send an FCP_RSP frame.

NOTE: If the host does not grant disconnect privilege in its IDENTIFY message these parameters

become meaningless. The drive will stay connected on the bus for the duration of an operation or until the host sends a mid-operation

SCSI drives

>0 The maximum amount of data that will be transferred during a data-in or

data-out phase before disconnecting. This field is in units of 512 bytes. The maximum burst size that the drive supports is 127 (7Fh) blocks of 512 bytes, that is, 64 KB less 512 bytes.

0 The drive may send bursts of any size. This is the default value.

always have continually increasing and contiguous data relative offset values for FCP_DATA.

fairness arbitration to send frames to the initiator.

0 The drive will not use fairness when arbitrating to send FCP_DATA frames. 1 The drive will use fairness when arbitrating to send FCP_DATA frames.

frames.

IDENTIFY granting disconnect privilege.

The Disconnect-Reconnect page has the following format for SCSI drives:

7 6 543210 0 PS (0) Rsvd (0) Page Code {02h} 1 Additional Page Length {0Eh} 2 Buffer Full Ratio (0) 3 Buffer Empty Ratio (0) 4 (MSB) 5 (LSB) 6 (MSB)

Bus Inactivity Limit (0)

Disconnect Time Limit [0]

7 (LSB) 8 (MSB) 9 (LSB)

10 (MSB) 11 (LSB)

Connect Time Limit (0)

Maximum Burst Size [0]

12 Reserved (0) DTDC (0)

13–15 Reserved (0)

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Freecom LTO-4 Host interface guide

Specifications and Main Features

Frequently Asked Questions

User Manual

Contents

The purpose of this manual

Related documents

Documents specific to HP LTO Ultrium drives

Documentation map

Installation and configuration

Operation

Cartridges

Interface

Maintenance and troubleshooting

Dealing with errors

LTO Ultrium features

General documents and standardization

1 Interface Implementation

The Fibre Channel interface

Supported task management functions

The SCSI interface

Supported messages

The SAS interface

Supported task management functions

Supported commands

SCSI features

Design approach

Power-on

Reset strategy

Abort handling

LUN identification (SCSI only)

Bus parity or CRC errors (SCSI only)

Disconnect strategy (SCSI only)

Link error handling (SAS drives)

Multi-initiator support

Fibre Channel operation

Fibre Channel addressing

Names

Addresses

HP’s implementation of names and addresses

Implications for libraries

Field replaceable units

CD-ROM emulation (SCSI and SAS drives only)

Message Out support (SCSI only)

Message In support (SCSI only)

Extended Message support (SCSI only)

Status

3 Response frames and task management functions

Response frames

Task management functions

Summary

Command details

Pre-execution checks

Bad LUN check

Deferred Error check

Diagnostic Status check

Fixed Bit check

Flag Link check

Illegal Command check

Illegal Field/Request check

Media Access check

Media Information check

Media Write check

Parameter List check

Reservation check

Unit Attention check

Command descriptor block

5 Commands

Enhanced FIRMWARE UPGRADE DOWNLOAD FIRMWARE SEGMENT A4h (1Fh)

Enhanced FIRMWARE UPGRADE REBOOT A4h (1Fh)

Enhanced FIRMWARE UPGRADE REPORT IMAGE INFO A3h (1Fh)

ERASE 19h

INQUIRY 12h

INQUIRY data pages

Vital Product Data pages

Supported Vital Product Data Pages page

Unit Serial Number page

Device Identification page

Defined identifiers

Management Network Address VPD page