Quantum SCALAR INTELLIGENT LIBRARIES SCSI User Manual

Quantum Scalar Intelligent Libraries

6-00423-09

Quantum Scalar Intelligent Libraries

Scalar Series

SCSI Reference Guide SCSI Reference Guide SCSI Reference Guide

Scalar® Intelligent Libraries SCSI Reference Guide, 6-00423-09, Ver. A, March 2010, Made in USA.

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1 SCSI Command Support 1

Device Model. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Controller Device Commands and Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Media Changer Commands and Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

General Command Support Behavior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Multiple Initiator Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Element Addressing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Command Status. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Unit Attentions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Resets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Common CDB Fields. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Reserved Fields. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Online/Offline Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Supported Interfaces. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

SCSI Parallel Interface Support. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Fibre Channel Interface Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Logical Libraries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Mailbox Behavior. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Autocleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Removed Drives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

2 SCSI Commands 11

Initialize Element Status - 07h. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

What the Library Does With This Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Command Usage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Initialize Element Status CDB Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Initialize Element Status With Range - E7h. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

What the Library Does With This Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Command Usage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Initialize Element Status With Range CDB Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Inquiry - 12h. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

What the Library Does With This Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Command Usage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Inquiry CDB Format. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Standard Inquiry Response. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Vital Product Data Pages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Scalar Intelligent Libraries SCSI Reference Guide iii

Log Sense - 4Dh . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

What the Library Does with This Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Command Usage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Log Sense CDB Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Log Sense Response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Supported Log Page (00h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Tape Alert Log Page (2Eh) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Mode Select (6) - 15h . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

What the Library Does With This Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Command Usage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Mode Select (6) CDB Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Mode Select (10) - 55h . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

What the Library Does With This Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Command Usage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Mode Select (10) CDB Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Mode Sense (6) - 1Ah . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

What the Library Does With This Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Command Usage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Mode Sense (6) CDB Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Mode Sense (6) Response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Mode Sense (10) - 5Ah . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

What the Library Does With This Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Command Usage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Mode Sense (10) CDB Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Mode Sense (10) Response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Mode Pages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Disconnect-Reconnect Page (02h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Fibre Channel Logical Unit Control Page (18h). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Fibre Channel Port Control Page (19h). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Informational Exceptions Control Page (1Ch). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Element Address Assignment Page (1Dh) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Transport Geometry Parameters Page (1Eh) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Device Capabilities Page (1Fh). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

All Mode Pages (3Fh) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Move Medium – A5h . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

What the Library Does With This Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

Command Usage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

Move Medium CDB Format. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

Persistent Reserve In – 5Eh . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

What the Library Does With This Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Command Usage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Persistent Reserve In CDB Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Persistent Reserve In Response. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Persistent Reserve Out – 5Fh . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

What the Library Does With This Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Command Usage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Persistent Reserve Out CDB Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Position to Element – 2Bh. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

What the Library Does With This Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Command Usage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Position to Element CDB Format. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Prevent Allow Medium Removal – 1Eh . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

What the Library Does With This Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

Command Usage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

Prevent Allow Medium Removal CDB Format. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

iv Contents

Read Buffer – 3Ch. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

What the Library Does With This Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

Command Usage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

Read Buffer CDB Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

Read Buffer Response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

Read Element Status – B8h . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

What the Library Does With This Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

Command Usage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

Read Element Status CDB Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

Read Element Status Response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

Element Descriptors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

Release Element – 17h. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

What the Library Does With This Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

Command Usage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

Release Element CDB Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

Report LUNS – A0h. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

What the Library Does With This Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

Command Usage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

Report LUNS CDB Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

Report LUNS Response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

Request Sense – 03h . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

What the Library Does With This Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

Command Usage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

Request Sense CDB Format. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

Request Sense Response. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

Additional Sense Codes and Qualifiers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

Request Volume Element Address - B5h . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

What the Library Does With This Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

Command Usage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

Request Volume Element Address CDB Format. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

Request Volume Element Address Response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

Reserve Element - 16h . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

What the Library Does With This Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

Command Usage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

Reserve Element CDB Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

Send Diagnostic - 1Dh. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

What the Library Does With This Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

Command Usage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

Send Diagnostic CDB Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

Send Volume Tag - B6h . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81

What the Library Does With This Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81

Command Usage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81

Send Volume Tag CDB Format. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81

Volume Identification Template Parameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

Test Unit Ready (00h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . 83

What the Library Does With This Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

Command Usage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

Test Unit Ready CDB Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

Write Buffer (3Bh) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

What the Library Does With This Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

Command Usage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

Write Buffer CDB Format. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

Scalar Intelligent Libraries SCSI Reference Guide v

vi Contents

Tables

Table 1 Controller Device Supported Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Table 2 Controller Device Supported Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Table 3 Media Changer Supported Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Table 4 Media Changer Device Supported Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Table 5 Control Byte . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Table 6 Supported SCSI Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Table 7 INITIALIZE ELEMENT STATUS CDB format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Table 8 INITIALIZE ELEMENT STATUS WITH RANGE CDB format . . . . . . . . . . . . . . . . . . . . . . . . 13

Table 9 INQUIRY CDB format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Table 10 Standard Inquiry Response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Table 11 Supported Vital Product Data Page (00h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Table 12 Unit Serial Number Page (80h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Table 13 Device Identification Page (83h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Table 14 Identification Descriptors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Table 15 Media Changer Identification Descriptor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Table 16 Controller Node Identification Descriptor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Table 17 Controller Port Identification Descriptor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Table 18 Node and Port Worldwide Names . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Table 19 Controller Port Number Identification Descriptor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Table 20 LOG SENSE CDB format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Table 21 Page Code field . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Table 22 Log Page format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Table 23 Log Parameter Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Table 24 Supported Log Page (00h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Scalar Intelligent Libraries SCSI Reference Guide vii

Table 25 Tape Alert Log Page Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Table 26 MODE SELECT CDB format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Table 27 Mode Parameter Header format for Mode Select (6) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Table 28 MODE SELECT CDB format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Table 29 Mode Parameter Header format for Mode Select (10) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Table 30 MODE SENSE CDB format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Table 31 Page Control (PC) field . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Table 32 Mode Parameter Header format for Mode Sense (6) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Table 33 MODE SENSE CDB format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Table 34 Page Control (PC) field . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Table 35 Mode Parameter Header format for Mode Sense (10) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Table 36 Supported Mode Pages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Table 37 Disconnect-Reconnect Page (02h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Table 38 Fibre Channel Logical Unit Control Page (18h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Table 39 Fibre Channel Port Control Page (19h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Table 40 Informational Exceptions Control Page (1Ch) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Table 41 Element Address Assignment Page (1Dh) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Table 42 Transport Geometry Parameters Page (1Eh) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Table 43 Device Capabilities Page (1Fh) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Table 44 MOVE MEDIUM CDB format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

Table 45 PERSISTENT RESERVE IN CDB format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Table 46 Read Keys Response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

Table 47 Read Reservations Response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

Table 48 PERSISTENT RESERVE OUT CDB format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Table 49 PERSISTENT RESERVE OUT parameter list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

Table 50 POSITION TO ELEMENT CDB format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Table 51 PREVENT ALLOW MEDIUM REMOVAL CDB format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

Table 52 READ BUFFER CDB format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

Table 53 Supported Buffer IDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

Table 54 Read Buffer Response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

Table 55 Offset Boundary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

viii Tables

Table 56 Echo Buffer Descriptor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

Table 57 READ ELEMENT STATUS CDB format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

Table 58 Element Type Code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

Table 59 Element Status Header format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

Table 60 Element Status Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

Table 61 Primary Volume Tag Field . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

Table 62 Storage Element Descriptor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

Table 63 Import/Export Element Descriptor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

Table 64 Data Transfer Element Descriptor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

Table 65 RELEASE ELEMENT CDB format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

Table 66 REPORT LUNS CDB format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

Table 67 Report LUNS Response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

Table 68 REQUEST SENSE CDB format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

Table 69 Request Sense Response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

Table 70 Sense Key . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

Table 71 Additional Sense Codes and Qualifiers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

Table 72 REQUEST VOLUME ELEMENT ADDRESS CDB format . . . . . . . . . . . . . . . . . . . . . . . . . . 76

Table 73 Element Type Code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

Table 74 Element Status Header . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

Table 75 RESERVE ELEMENT CDB format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

Table 76 SEND DIAGNOSTIC CDB format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

Table 77 SEND VOLUME TAG CDB format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81

Table 78 Element Type Code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

Table 79 Volume Identification Template Parameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

Table 80 Test Unit Ready statuses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

Table 81 TEST UNIT READY CDB format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

Table 82 WRITE BUFFER CDB format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

Scalar Intelligent Libraries SCSI Reference Guide ix

x Tables

SCSI Command Support

Note

Device Model

Quantum intelligent libraries support both a Media Changer device (device type 08h) and a Controller device (device type 0Ch). This approach is used primarily to aid initialization and discovery for the servers in conjunction with the library’s Logical Library model. In addition, the Controller device model facilitates continued use of Host Registration Services (HRS) functionality, which uses private (externally undocumented) commands and vendor unique parameters. In the case of a Scalar i40, Scalar i80, or Scalar i500 library without Data Appliance (DA) blades, there is no Controller device; the tape drives provide access to the Media Changer devices.

"DA blade" is a generic term used in this manual to describe a number of possible types of input/output blades, including FC-FC, FC-SCSI, and possibly, in future, iSCSI-SAS or other combinations.

This device model approach works by having the Controller (typically at LUN 0) respond to all commands, and the Logical Libraries (Media Changers) respond to other assigned LUNs (or Targets if on the SCSI port). This approach allows an Initiator (Host) to issue a Report LUNs command to the Controller to retrieve a listing of all available logical units on that port. For systems with Fibre Channel (FC) ports, this is an advantage as there are large number of possible logical units to search. (In the case of a Scalar i40, Scalar i80, or Scalar i500 without DA blades, this command should be issued to the tape drives.)

For a tape library with DA blades, this model can be extended to report the number of availa ble tape drive s as well.

For all systems except the Scalar i40, Scalar i80, and Scalar i500 without DA blades, it is possible to define a Media Changer at LUN 0 and the Controller at a d ifferent LUN. For a Scalar i40, Scalar i80, or Scalar i500 without DA blades, the Media Changer(s) is always found at LUN 1, and the tape dr ive or drives are found at LUN 0.

Note that the Controller device is not a pure Controller device, in that it does not support all the mandatory commands defined by SCC, but this is an accepted industry practice estab lished by vendors of bridges and routers.

Additional commands and parameters supported by the Controller LUN (such as Maintenance In) are for use by Quantum’s Host Registration Service s s of twa re , and ar e no t inclu d ed in this ma n ual .

Scalar Intelligent Libraries SCSI Reference Guide 1

Controller Device Commands and Parameters

Note

The following table lists the commands supported by the Controller device.

The following commands do not apply to the Scalar i40 and Sca lar i80 . For the Scalar i500, these commands apply only when a DA blade is present in the library.

Table 1 Controller Device Supported Commands

Command Code

INQUIRY 12h MODE SELECT (6) 15h MODE SELECT (10) 55h MODE SENSE (6) 1Ah MODE SENSE (10) 5Ah READ BUFFER 3Ch REPORT LUNS A0h REQUEST SENSE 03h TEST UNIT READY 00h WRITE BUFFER 3Bh

The following table lists the parameters supported by the Controller device.

Table 2 Controller Device Supported Parameters

Command Page Code

Inquiry Supported VPD Pages 00h Inquiry Unit Serial Number Page 80h Inquiry Device Identification Pag e 83h Mode Select/Sense Disconnect Reconnect Page 02h Mode Select/Sense FC LU Control Page 18h Mode Select/Sense FC Port Control Page 19h Mode Sense Return all pages 3Fh

2 SCSI Command Support

Media Changer Commands and Parameters

The following table lists the commands supported by the Media Changer device.

Table 3 Media Changer Supported Commands

Command Code

INITIALIZE ELEMENT STATUS 07h INITIALIZE ELEMENT STATUS WITH RANGE E7h INQUIRY LOG SENSE 4Dh MODE SELECT (6) 15h MODE SENSE (6) 1Ah MOVE MEDIUM A5h PERSISTENT RESERVE IN PERSISTENT RESERVE OUT POSITION TO ELEMENT 2Bh

12h

5Eh 5Fh

PREVENT ALLOW MEDIUM REMOVAL 1Eh READ BUFFER

3Ch READ ELEMENT STATUS B8h RELEASE ELEMENT (6) REPORT LUNS

REQUEST SENSE REQUEST VOLUME ELEMENT ADDRESS RESERVE ELEMENT (6)

17h

A0h

03h

B5h

16h SEND DIAGNOSTIC 1Dh SEND VOLUME TAG TEST UNIT READY WRITE BUFFER

For the Scalar i40, Scalar i80, and Scalar i500 without DA blades, this

command is processed by the tape drive on behalf of the media changer.

The Scalar i40 and Scalar i80 media changers do not support this command.

The Scalar i500 media changer does not support this command unless it contains a Data Appliance (DA) blade.

The Scalar i40, Scalar i80, and Scalar i500 do not support this command.

B6h

00h

3Bh

Scalar Intelligent Libraries SCSI Reference Guide 3

The following table lists the parameters supported by the Media Changer device. The Media Changer does not support any diagnostic parameter s.

Table 4 Media Changer Device Supported Parameters

Command Page Code

Inquiry Supported VPD Pages 00h Inquiry Unit Serial Number Page 80h Inquiry Device Identification Page 83h Log Sense Supported Log Pages 00h Log Sense Tape Alert Page 2Eh Mode Sense FC LU Control Page Mode Sense FC Port Control Page

18h

19h Mode Sense Informational Exceptions Control Page 1Ch Mode Sense Element Address Assignment Page 1Dh Mode Sense Transport Geometry Parameters Page 1Eh Mode Sense Device Capabilities Page 1Fh Mode Sense Return all pages 3Fh

For the Scalar i40, Scalar i80, and Scalar i500 without data appliance (DA) blades, this

page is not supported.

This page is supported only when the Media Changer is available on LUN 0.

4 SCSI Command Support

General Command Support Behavior

Multiple Initiator Support

Multiple initiators are not supported on the SCSI interface. Information such as unit attentions and sense data will be held for only a single initiator. Multiple initiators are supported on the Fibre Channel inte r face. Unit attentions and sense data will be held for each initiator.

Element Addressing

The element-addressing model follows that of previous Quantum libraries. The starting addresses of the four element types are:

• 0001h: Medium Transport

• 0010h: Import/Export

• 0100h: Data Transfer

• 1000h: Storage

Command Status

Individual command status responses are not documented, as they all follow the same general format as described here. After processing any command, the library returns status from among the following:

Good - The library returns a Good status (00h) when it is able to process the command without errors. Busy - The library returns Busy status (08h) when a motion command is still being processed, or the library

is generally not able to process additional commands at that time. Reservation Conflict - The library returns a Reservation Conflict (18h) whenever an initiator attempts to

access a logical unit that has been reserved by another initiator, except for the following commands:

• INQUIRY

• LOG SENSE

• MODE SENSE (Only Scalar i40, Scalar i80, and Scalar i500)

• PREVENT/ALLOW MEDIUM REMOVAL

• READ ELEMENT STATUS (only when the Current Data [CurData] field is set to 1)

• REPORT LUNS

• REQUEST SENSE

Check Condition - The library returns the Check Condition status (02h) when the following general situations occur (all generate sense data):

• The library is Not Ready (sense key 02h)

• The library has encountered a Hardware Error (sense key 04h)

• A parameter in the CDB is invalid or there is an invalid field in a parameter list, resulting in an Illegal Request (sense key 05h)

• A Unit Attention condition is pending (sense key 06h)

• A command has been aborted (sense key 0Bh)

Scalar Intelligent Libraries SCSI Reference Guide 5

For a complete list of all possible sense data and their causes, refer to Request Sense – 03h on page 70. This status information will not be separated by individual commands.

Status values of Condition Met, Intermediate Condition Met, and Queue Full are not currently used. The Initiator should issue a Request Sense command to determine the precise cause of the Check Condition status and clear it.

Response data, however, will be documented as applicable for each command, and included as part of the command section.

Unit Attentions

Unit Attentions will be queued by the library as necessary to report all events and conditions. They are presented in the order of their occurre nc e (fir st in, first out). Unit attentions are generated for the following conditions:

• A power on or a reset (external or internal) occurred

• A library door closed, or a transition from not ready to ready occurred

• A mailbox closed

• A firmware update completed

• A persistent reservation has been preempted or released, or a registration has been preempted

• Mode parameters have changed

Resets

Either a Power On Reset or a SCSI Reset resets the library. When reset, the library does the following:

• Returns to Bus Free

• All non-persistent reservations are cleared

Common CDB Fields

Each Command Descriptor Block contains a Logical Unit Number (LUN) field as well as a Control byte field. The LUN field is bits 5-7 of byte 1 and is there only for legacy compatibility. Logical Unit selection should be accomplished via the Identify message.

The Control byte is shown in the following table. It is always the last byte of a CDB, regardless of the size of the CDB.

Table 5 Control Byte

Bit

Byte

last Vendor Specific Reserved NACA Flag Link

Vendor Specific – This field is used to provide additional data or control for a command. Specific uses (if any) are described within the applicable commands.

76543210

Normal Auto Contingent Allegiance (NACA) – If this field is set to 0, the initiator should issue a REQUEST

SENSE command immediately following receipt of a Check Condition. If this field is set to 1, ACA support will be provided.

Flag – This field is not supported and must be set to 0. Link – This field is not supported and must be set to 0.

6 SCSI Command Support

Reserved Fields

Reserved fields are not checked, and no error will be sent if they contain non-zero values.

Online/Offline Operation

Each Media Changer device can be placed in eithe r an online or offline mode. The purpose of these mod es is to configure whether the Media Changer is being controlled by a SCSI initiator or by the operator panel. When the Media Changer is online, a SCSI initiator is controlling it and all SCSI commands are supported. When the Media Changer is offline, the operator panel is controlling it, and the only allowed SCSI commands are INQUIRY, REPORT LUNS, and REQUEST SENSE. All other commands will respond with a check condition, along with an ASC/ASCQ of 04/8D (unit offline).

The controller device is not affected by the online/offline mode of the Media Changer.

Supported Interfaces

SCSI Parallel and Fibre Channel interface types are supported as described below.

SCSI Parallel Interface Support

The library supports parity checking on the SCSI Parallel interface. It will attempt to retry when parity errors are detected, but if unsuccessful will attempt to respond with a Check Condition indicating in which phase the parity error was detected.

If permitted by the initiator, the library will also support SCSI disconnect for commands that take a lengthy time to process, such as MOVE MEDIUM. Disconnect privilege is granted by the initiator via the Identify message.

Supported Messages

The SCSI message system (Message In/Message Out) allows communication between an initiator and a target for the purpose of physical path management. The supported messages are shown in the following table. The direction is relative to the initiator.

Table 6 Supported SCSI Messages

Message Code Direction Description

COMMAND COMPLETE 00h In This message is sent from the target to an initiator

to indicate that the execution of a command completed and valid status has been sent to the initiator.

EXTENDED MESSAGE 01h Out This message is sent from an initiator to the target

to attempt to negotiate synchronous or wide data transfers. The library supports both.

SAVE DATA POINTERS 02h In This message is issued before every disconnect

message following a Data In or Data Out phase. The message is not sent when disconnecting after a Command Descriptor Block (CDB) that did not transfer data.

Scalar Intelligent Libraries SCSI Reference Guide 7

Table 6 Supported SCSI Messages (Continued)

Message Code Direction Description

RESTORE POINTERS 03h In This message is sent from the target to direct the

initiator to continue sending data.

DISCONNECT 04h In This message is sent by the target to inform an

initiator that the present data transfer will be suspended. The target will reselect the initiator at a later time to continue the current operation.

INITIATOR DETECTED ERROR

ABORT 06h Out This message is sent from the initiator to the target

MESSAGE REJECT 07h Both This message is sent from the initiator or target to

NO-OP 08h Out This message is sent from the initiator to inform the

MESSAGE PARITY ERROR

BUS DEVICE RESET 0Ch Out This message is sent from an initiator to clear all

05h Out This message is sent from an initiator to inform the

target that an error occurred. This allows the target to retry the operation.

to clear the current or pending operation. The target goes directly to the BUS FREE phase after successful receipt of this message.

indicate that the last message received was inappropriate or not implemented.

target that no message is valid in response to the target request for a message.

09h Out This message is sent from the initiator to the target

to indicate that one or more bytes in the last message received contained a parity error.

commands, data, and status at the target. When the target recognizes this message, it aborts the command currently being executed and proceeds to the BUS FREE state.

IDENTIFY 80h-

FFh

Both These messages are sent either by the initiator or

by the target to establish (or re-establish) the logical connection path (nexus) between an initiator and target for a particular logical unit.

Fibre Channel Interface Support

The library Fibre Channel ports can be N_Port s for point- to-point topologies or NL_Por ts for arbitrated loop topologies. Only Class 3 service is supported. Private arbitrated loops are supported if the library is not attached to a Fibre Channel fabric, and public arbitrated loops are supported if the library is attached to a Fibre Channel fabric.

8 SCSI Command Support

Logical Libraries

The underlying physical library is not expose d e xte rn ally to applications. Rather, logical representations of Media Changer devices are created, and these are presented instead. Through this method the physical library can be partitioned and concurrently shared in a heterogeneous environment. Depending on library model and number of configured drives, 1 to 18 partitions can be created. Storage and Data Transfer elements cannot be shared across logical libraries; they can only be assigned to one logical library at a time. The Medium Transport element (the robotic mechanism) is shared acr oss all logical libraries, and as a result there may be some delays encountered as each logical library waits its turn for this shared resource.

Import/Export elements can also be shared across logical libraries. This is further discussed in Mailbox

Behavior. All other aspects of the logical Media Changer devices are identical to an independent physical

Media Changer.

Mailbox Behavior

The following characteristics affect Import/Export elements:

• The Import/Export elements are contained in removable magazines. When the magazines are removed, the elements are still counted in the number of Import/Export elements and will have element descriptors returned for them in re sponse to a READ ELEMENT STATUS command. Their element status will indicate that they are not accessible, and will also report an exception with an ASC/ASCQ of 3B/12.

• Some Quantum libraries are configured with multiple physical mailboxes, each contai ning their own set of magazines. Whenever a mailbox is opened, the status for the elements it contains will indicate that they are not accessible until the mailbox is closed again.

• The mailbox magazine(s) can be assigned to and shared by different logical libraries. The Import/ Export elements they contain are then used on a “first come, first served” basis. When shared Import/Export elements are in use by one logical library, element status for those elements will indicate that they are empty, but not accessible for all other logical libraries that share them. The presence of media and associated volume tag information will only be available to the logical library using the elements at that time. When media is removed from the shared elements, they become available for use by the next logical library requesting them , and their element status indicates that they are accessible.

These characteristics require applications to process the complete element status retur ned in the ele men t descriptors (including accessibility and exception conditions) to achieve optimum usage of the Import/ Export elements. Reliance on only full or empty element status may result in failed operations (e.g., an Export). This might be due to not locating a usable Import/Export element when several may actually be available, if the search had only taken into account full status rather than accessibility.

Autocleaning

Quantum libraries support a user-configurable option to have the library automatically clean drives when requested by the drives (refer to the specific Quantum library documentation for details). This process involves the library loading a special cleaning cartridge into the requesting drive, allowing the drive to perform the cleaning operation, and then the library unloading the cartridge and returning it to storage.

If this option is enabled and configured, the library maintains a pool of storage slots that contain the cle aning cartridges. These slots and cartridges are not associated with or counted towards any logical library, and as such are not reported to any application.

Scalar Intelligent Libraries SCSI Reference Guide 9

The library typically checks for cleaning requests from drives after unloading data cartridges. If a cleaning request is found, the library will select a cleaning cartridge from the pool and perform the clean. While the cleaning operation is in progress, the logical library containing the drive being cleaned will continue to accept and perform SCSI commands. If a Move Medium command is received with the drive as a destination, and it is still being cleaned, the command will be queued until the cleaning operation completes. Cleaning operations vary by drive and conditions, but can take up to a few minutes to complete.

Element status for the Data Transfer element being cleaned will not reflect the presence of the cleaning cartridge. It will continue to report that it is empty and accessible.

Removed Drives

Depending on how the library is configured, occasionally Data Transfer elements will be reported where no drive is physically present at the time. This could be due to a drive that has been removed for servic e, or simply a placeholder for the addition of a future drive. These empty “drive bays” will be counted and reported via Mode Sense and Read Element Status commands. Status for such elements will indicate that they are not accessible, and will report an ASC/ASCQ of 83/04. These elements could appear in between Data Transfer elements that are present, creating “gaps” among the physical drives. This should not be considered an error.

10 SCSI Command Support

SCSI Commands

Initialize Element Status - 07h

What the Library Does With This Command

The library will determine status (full or empty) for all elements, as well as barcode label information (volume tags) for the media. Barcode labels will be scanned unless otherwise directed (and the library supports a non-barcode option). The library may not fully execute this command if the Automatic Inventory option is enabled, and element status is already known.

Results of the status initialization will be buffered by the library for retrieval via the READ ELEMENT STATUS command. Element status and barcode label information is retained by the library across power cycles.

Command Usage

This command can be used to gather status for all the elements, and should be issued whenever the library indicates that element status may have changed, such as after a power cycle or door opening and closing. It should then be followed by a READ ELEMENT STATUS command to retrieve the status.

Scalar Intelligent Libraries SCSI Reference Guide 11

Initialize Element Status CDB Format

The INITIALIZE ELEMENT STATUS CDB format is shown in the following table.

Table 7 INITIALIZE ELEMENT STATUS CDB format

Bit

Byte

0 Op Code (07h) 1 Logical Unit Number Reserved 2 Reserved 3 Reserved 4 Reserved 5NBL Control

No Barcode Labels (NBL) – A value of 0 indicates that the specified elements will be checked for all relevant status, including bar code labels. A value of 1 indicates that elements will be checked for media presence only (no bar code labels).

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12 SCSI Commands

Initialize Element Status With Range - E7h

What the Library Does With This Command

The library will examine the range of elements requested and determine their status relative to media presence (full or empty). Barcode labels will be scanned unless otherwise directed (and the library supports a non-barcode option). The library will always fully execute this command regardless of the Automatic Inventory setting.

Command Usage

This command can be issued to gather status for some or all of the elements, and can be used in conjunction with host application error handling if the normal element status maintained by the library returns an unexpected result. It should then be followed by a READ ELEMENT STATUS command to retrieve the status.

Initialize Element Status With Range CDB Format

The INITIALIZE ELEMENT STATUS WITH RANGE CDB format is shown in the following table.

Table 8 INITIALIZE ELEMENT STATUS WITH RANGE CDB format

Bit

Byte

0 Op Code (E7h) 1 Logical Unit Number Reserved Range 2 3 4 Reserved 5 Reserved 6 7 8 Reserved 9NBL Control

Range – A value of 0 indicates that all element addresses will be checked and that the Starting Element Address and Number of Elements fields will be ignored. A value of 1 indicates that the series of elements beginning at the specified Starting Element Address for the specified Number of Elements will be checked.

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Starting Element Address

Number of Elements

Starting Element Address - The Starting Element Address specifies the beginning address of the range to check. It must be a valid address for an element that exists within the library; no adjustment will be made to convert to a next higher valid address. This field is ignored if the Range field is 0.

Scalar Intelligent Libraries SCSI Reference Guide 13

Number of Elements - This field specifies the number of elements to check. Gaps in element types and addresses are automatically handled until a quantity of physical elements equal to this number has been checked. If this field is 0, the range checked will start with the Starting Element Address and continue through all remaining elements. This field is ignored if the Range field is 0.

14 SCSI Commands

Inquiry - 12h

What the Library Does With This Command

In response to this command the library returns static data that describes various subsystem parameters. Each Controller and Media Changer logical unit will return its own Inquiry data. If an INQUIRY command is received from an initiator with a pending unit attention condition, the library will perform the INQUIRY command and will not clear the unit attention condition. An INQUIRY command will respond with a Check Condition status only when it cannot return the requested Inquiry data.

Command Usage

This command would normally only be issued once for each logical unit as desired by the initiator to facilitate the initialization process.

Inquiry CDB Format

The INQUIRY CDB format is shown in the following table.

Table 9 INQUIRY CDB format

Bit

Byte

0 Op Code (12h) 1 Logical Unit Number Reserved CMDDT EVPD 2 Page Code 3 Reserved 4 Allocation Length 5 Control

Command Support Data (CMDDT) – This field is not supported and must be set to 0. Enable Vital Product Data (EVPD) – An EVPD value of 1 indicates that the vital product data specified by

the Page Code should be returned. A value of 0 indicates that standard inquiry data should be returned. Page Code - This field specifies which vital product data page to return if the EVPD bit is set to 1. If the

EVPD bit is set to 0, the Page Code must be 00h. The library supports the following page codes:

• 00h - Supported Vital Product Data pages (this list)

• 80h - Unit Serial Number page

• 83h – Device Identification page

Allocation Length - The Allocation Length field specifies the maximum number of bytes that the initiator allocated for returned inquiry data. An Allocation Length of 0 indicates that no inquiry data is to be transferred (this condition is not considered an error).

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The library terminates the data transfer when it has transferred the lesser of either the number of bytes specified by the Allocation Length field or all of the available inquiry data.

Scalar Intelligent Libraries SCSI Reference Guide 15

Standard Inquiry Response

Table 10 Standard Inquiry Response

Bit

Byte

0 Peripheral Qualifier Peripheral Device Type 1RMB Reserved 2Version 3 AERC Obsolete 4 Additional Length 5 SCCS Reserved 6 BQue EncServ BarC MultiP MChngr Obsolete Obsolete Addr16 7 RelAdr Obsolete Wbus16 Sync Linked Obsolete CmdQue SftRe

8 15 16 31 32 35

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NormACA

HiSup Response Data Format

Vendor Identification

Product Identification

Firmware Revision Level

36 54 55 Reserved BarC

Peripheral Qualifier – A return value of 000b indicates that the library supports the peripheral device type at the specified LUN. A return value of 001b indicates that the library is capable of supporting th e peripheral device type at the specified LUN, however the device is not cur rently connected to it. A return value of 011b indicates no peripheral device types are supported at that LUN.

Peripheral Device Type – For Media Changer logical units, this field returns 01000b (08h) to indicate it is a Media Changer device. For the Controller logic al un it, this field returns 01100b (0Ch) to indicate it is a Controller device. If an unsupported LUN was specified, this field retu rns 11111b (1Fh), which indicates that the device type is unknown.

Removable Medium Bit (RMB) – For Media Changer logical units, this field re tu rns 1 , indicating med ia is removable. For the Controller logical unit it returns 0.

Version – This field returns 03h, indicating compliance with the SCSI-3 standard. Asynchronous Event Reporting Capability (AERC) – Returned as 0, indicating AERC is not supported. Normal ACA Supported (NormACA) – This field returns a 1, indicating the NACA bit in the Control byte

of a CDB is supported. The Scalar i40, Scalar i80, and Scalar i500 without Data Appliance blades does not support the NACA bit and therefore returns 0 for this field.

Hierarchical Support (HiSup) – This field returns a 1, in dicating that the hierarchical addressing model is used to assign LUNs, and that the REPORT LUNs command is supported.

Full Firmware Revision Level

Response Data Format – Returned as 0010b, indicating response data is in standard SCSI format.

16 SCSI Commands

Additional Length – For the Media Changer logical units, this field returns 33h, indicating 51 additional bytes of data are available. For the Controller logical unit, this field returns 1Fh, indicating 31 additional bytes of data (following this field) are available to the initiator.

SCC Supported (SCCS) – For the Media Changer logical units, this field returns a 0. For the Controller logical unit, this field returns a 1.

Basic Queuing (BQue) – Returned as 0, indicating basic queuing is not supported. Enclosure Services (EncServ) – Returned as 0, indicating an enclosure services component is not

included. Bar Code (BarC) – For Media Changer logical units, this field returns a 1, indicating a bar code scanner or

imaging device is installed (also returned in byte 55 below). For the Controller logical unit, this field returns a 0.

Multi Port (MultiP) – Returned as 0, indicating that this is not a multi-port device. Media Changer (MChngr) – This field returns a 0, indicating it is not an attached Media Changer device. Wide SCSI Address 16 (Addr16) – Returned as 1, indicating 16-bit wide SCSI addresses are supported

(applies to parallel SCSI only).

Relative Address (RelAdr) – Returned as 0, indicating relative addressing is not supported. Wide Bus 16 (Wbus16) – Returned as 1, indicating 1 6 bit transfers are supp orted (applies to parallel SCSI

only). Synchronous Transfer (Sync) – Returned as 1, indicating synchronous transfers are supported (applies

to parallel SCSI only).

Linked Commands (Linked) – Returned as 0, indicating linked commands are not supported. Command Queuing (CmdQue) – For Fibre Channel, this is returned as 1, indicating command queuin g is

supported. For SCSI and SAS, this is returned as 0, indicating no command queuing is supported.

Soft Reset (SftRe) – Returned as 0, indicating a soft reset is not supported. Vendor Identification – Returned as one of the following (space filled to 8 bytes):

• "ADIC "

• "QUANTUM "

Product Identification – Depending upon the library type, returned as one of the following (space filled to 16 bytes):

• "Scalar 24 "

• "Scalar 100 "

• "Scalar 1000 "

• "Scalar i2000 "

• "Scalar 10K "

• "Pathlight VX "

• "Scalar i500 "

• "Scalar i40-i80 "

Firmware Revision Level – Returned as the ASCII representation of the revision level, such as “100A” or “203A”.

The remaining fields are only returned for Media Changer logical units. Full Firmware Revision Level – Same as the firmware revision level, but extended to include the build

number (if available).

Scalar Intelligent Libraries SCSI Reference Guide 17

Bar Code (BarC) – Returned as 1, indicating a bar code scanner or imagin g de vic e is insta lled . Also returned in byte 6 above.

Clocking (not shown in Table 10 Ultrium devices having parallel SCSI interfaces. In this case, the Additional Length field returns 35h, indicating 53 bytes of additional data are retur ned. The Clocking field occupies bits 2 and 3 of the additional byte 56 that is returned, and byte 57 is zero.

on page 16) – This field is only returne d for Scalar i500 libraries with IBM

Vital Product Data Pages

The collection of Vital Product Data pages is as follows:

Supported Vital Product Data Page (00h)

Table 11 Supported Vital Product Data Page (00h)

Bit

Byte

0 Peripheral Qualifier Peripheral Device Type 1 Page Code (00h) 2 Reserved 3 Page Length 4 First Page Code Supported

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5 Second Page Code Supported 6 Third Page Code Supported

Peripheral Qualifier - The return value 000b indicates that the library supports the peripheral device type at the specified LUN. This field returns 011b if no peripheral device types are supported at that LUN.

Page Code - Returned as 00h, indicating this page. Page Length - Returned as 03h, indicating the remaining number of bytes in this page following this field. First Page Code Supported - Returned as 00h, indicating support for the Supported Vital Product Data

Page.

Second Page Code Supported - Returned as 80h, indicating support for the Unit Serial Number Page. Third Page Code Supported - Returned as 83h, indicating suppor t for the Device Identification Page.

18 SCSI Commands

Unit Serial Number Page (80h)

Table 12 Unit Serial Number Page (80h)

Bit

Byte

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

Peripheral Qualifier – The return value 000b indicates that the library supports the peripheral device type at the specified LUN. This field returns 011b if no peripheral device types are supported at that LUN.

Page Code – Returned as 80h, indicating this page. Page Length – Returned as 18h, indicating the remaining number of bytes following this field. Serial Number – The value returned for this field is the serial number for the system, prefixed with the

vendor identification. The serial number is padded with trailing spaces as needed to complete the 24 bytes.

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Serial Number

For example:

QUANTUM123456789 or QUANTUM123456789_LL1

If the serial number cannot be obtained, the serial number portion is replaced with zeros followed by trailing spaces. For example:

QUANTUM000000000

Scalar Intelligent Libraries SCSI Reference Guide 19

+ 67 hidden pages

Quantum SCALAR INTELLIGENT LIBRARIES SCSI User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Contents

Tables

SCSI Command Support

Device Model

Controller Device Commands and Parameters

Media Changer Commands and Parameters

General Command Support Behavior

Multiple Initiator Support

Element Addressing

Command Status

Unit Attentions

Resets

Common CDB Fields

Reserved Fields

Online/Offline Operation

Supported Interfaces

SCSI Parallel Interface Support

Supported Messages

Fibre Channel Interface Support

Logical Libraries

Mailbox Behavior

Autocleaning

Removed Drives

SCSI Commands

Initialize Element Status - 07h

What the Library Does With This Command

Command Usage

Initialize Element Status CDB Format

Initialize Element Status With Range - E7h

What the Library Does With This Command

Command Usage

Initialize Element Status With Range CDB Format

Inquiry - 12h

What the Library Does With This Command

Command Usage

Inquiry CDB Format

Standard Inquiry Response

Vital Product Data Pages

Supported Vital Product Data Page (00h)

Unit Serial Number Page (80h)