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LTO-4
specifications
36 pgs535.67 Kb0
hardware integration
154 pgs1.95 Mb0
Host interface guide
254 pgs2.73 Mb0
Table of contents
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Freecom LTO-4 Host interface guide

HP LTO Ultrium tape drives technical reference manual
Volume 3: Host interface guide
LTO 4 drives
Edition 1, June 2007
HP restricted
Legal and notice information
© Copyright 1999–2007 Hewlett-Packard Development Company, L.P.
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

Contents

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

Related documents

The following documents provide additional information:

Documents specific to HP LTO Ultrium drives

• Hardware Integration Guide, volume 1 of the HP LTO Ultrium Technical Reference Manual
• Software Integration Guide, volume 2 of the HP LTO Ultrium Technical Reference Manual
• Specifications, volume 4 of the HP LTO Ultrium Technical Reference Manual
• UNIX, Linux and OpenVMS Configuration Guide, volume 5 of the HP LTO Ultrium Technical
Reference Manual
Please contact your HP supplier for copies.
• The features and benefits of HP LTO Ultrium drives are discussed in the HP LTO Ultrium
Technology White Paper.
• For a general background to LTO technology and licensing, go to
http://www.lto-technology.com.

Documentation map

The following will help you locate information in the Technical Reference Manual. A reference like “
1 HW Integration: ch. 7” means Volume 1, Hardware Integration Guide, of the HP LTO Ultrium
Technical Reference Manual, chapter 7.
Drives—general
Connectors Front panel LEDs
pecifications
S
Installation and configuration
Connectors Determining the configuration External drives
HP LTO Ultrium 4 tape drives technical reference manual, volume 3: host interface guide 9
FC Drives SCSI Drives SAS Drives
1 HW Integration: ch. 4 1 HW Integration: ch. 7
1 HW Integration: ch. 3 1 HW Integration: ch. 6
4 Specifications
FC Drives SCSI Drives SAS Drives
1 HW Integration: ch. 4 1 HW Integration: ch. 7
2 SW Integration: ch. 2
n/a 1 HW Integration: ch. 5
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In libraries In servers In tape arrays Linux configuration Modes of usage OpenVMS configuration Optimizing performance
UNIX configuration
Operation
External drives In libraries In servers In tape arrays
Cartridges
FC Drives SCSI Drives SAS Drives
1 HW Integration: ch. 1
n/a 1 HW Integration: ch. 4
n/a 1 HW Integration: ch. 3 n/a
5 UNIX, Linux, OpenVMS Configuration
n/a 1 HW Integration: ch. 8 n/a
5 UNIX, Linux, OpenVMS Configuration
n/a 1 HW Integration: ch. 8 n/a
2 SW Integration: ch. 4
5 UNIX, Linux, OpenVMS Configuration
FC Drives SCSI Drives SAS Drives
n/a 1 HW Integration: ch. 5
1 HW Integration: ch. 1
n/a 1 HW Integration: ch. 4
n/a 1 HW Integration: ch. 3 n/a
Cartridge Memory (LTO-CM) Cartridges Managing the use of cartridges Use of cartridges
Interface
FC, SCSI and SAS host interface guide Commands Error codes Implementation Interpreting sense data Messages Mode pages
—see the MODE SENSE command
10
FC Drives SCSI Drives SAS Drives
2 SW Integration: ch. 5
1 HW Integration: ch. 5 1 HW Integration: ch. 9
2 SW Integration: ch. 1
2 SW Integration: ch. 3
FC Drives SCSI Drives SAS Drives
3 Host Interface
3 Host Interface: ch. 5
1 HW Integration: ch. 6 1 HW Integration: ch. 10
3 Host Interface: ch. 1
2 SW Integration: ch. 3
3 Host Interface: ch. 2
3 Host Interface: ch. 5
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Pre-execution checks Responding to sense keys and ASC/Q Sense keys and ASC/Q
—see REQUEST SENSE command Task management functions
Maintenance and troubleshooting
Cleaning
External drives In libraries In servers In tape arrays) Monitoring drive and tape condition Software troubleshooting techniques
Dealing with errors
FC Drives SCSI Drives SAS Drives
3 Host Interface: ch. 4
2 SW Integration: ch. 6
3 Host Interface: ch. 5
n/a 3 Host Interface: ch. 3
FC Drives SCSI Drives SAS Drives
2 SW Integration: ch. 5 2 SW Integration: ch. 7
n/a 1 HW Integration: ch. 5
1 HW Integration: ch. 1
n/a 1 HW Integration: ch. 4
n/a 1 HW Integration: ch. 3 n/a
2 SW Integration: ch. 7
2 SW Integration: ch. 1
Error codes Handling errors Logs—see the LOG SENSE command Recovering from write and read errors Software response to error correction Software response to logs TapeAlert log
LTO Ultrium features
Autoload Automation Control Interface (ACI) Cartridge Memory (LTO-CM)
Data compression, managing OBDR and CD-ROM emulation
HP LTO Ultrium 4 tape drives technical reference manual, volume 3: host interface guide 11
FC Drives SCSI Drives SAS Drives
1 HW Integration: ch. 6 1 HW Integration: ch. 10
2 SW Integration: ch. 5
3 Host Interface: ch. 4
2 SW Integration: ch. 7
2 SW Integration: ch. 3 2 SW Integration: ch. 3
2 SW Integration: ch. 7
FC Drives SCSI Drives SAS Drives
1 HW Integration: ch. 2
1 HW Integration: ch. 2
1 HW Integration: ch. 2
2 SW Integration: ch. 5 2 SW Integration: ch. 5
2 SW Integration: ch. 7
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FC Drives SCSI Drives SAS Drives
Performance optimization
n/a 1 HW Integration: ch. 8
Performance, factors affecting Software design Supporting LTO Ultrium features
General documents and standardization
See http://www.t10.org/t10_main.htm for INCITS SCSI Primary Commands—3 (SPC-3), SCSI Streaming Commands (SSC-3) and other specifications
Copies of documents of other standards bodies can be obtained from:
2 SW Integration: ch. 1 2 SW Integration: ch. 4
2 SW Integration: ch. 1
2 SW Integration: ch. 5
INCITS
ISO
ECMA
Global Engineering
Documents
11 West 42nd Street New York, NY 10036-8002 USA
CP 56 CH-1211 Geneva 20 Switzerland
114 Rue du Rhône CH-1204 Geneva Switzerland
2805 McGaw Irvine, CA 92714 USA
Tel: +41 22 849 6000
Web URL: http://www.ecma.ch
Tel: 800 854 7179 or 714 261 1455
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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
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
CHECK CONDITION
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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
No
Disconnect
priv granted
Yes
DisconnectSend data
No
Reselect
Data transfer
required?
No
No
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
31
NAA=5
24
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
15
Area
Addess
7
8
Port or AL_PA
Addess
7
15
8
0
VSID
0
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.
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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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