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Element Status Element Descriptors, Element Type Code, PVolTag

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Element Status Page Each element status page consists of an eight-byte header, followed by one or more element descriptor blocks. One Element Status Page header is returned for each grouping of element descriptor blocks, by element type. The format of the Element Status Page header is shown in the following table. Table 60 Element Status Page Byte Bit 7 6 5 4 3 2 1 0 0 Element Type Code 1 PVolTag AVolTag Reserved 2 Element Descriptor Length 3 4 Reserved 5 Byte Count of Descriptor Data Available 7 Element Type Code - This field indicates the specific element type being returned by the element descriptors for this page. PVolTag - A value of one indicates that the primary volume tag field (barcode label) is present in each of the element descriptor blocks that follow. A value of zero indicates that they are not present. AVolTag - Alternate Volume Tags are not supported. The returned value for this field is 0, and the alternate volume tag fields are omitted from the element descriptors. Element Descriptor Length - This field indicates the number of bytes contained in a single element descriptor. Refer to the individual element descriptor descriptions for each element type for their respective possible lengths. Byte Count of Descriptor Data Available - This field indicates the number of element descriptor data bytes available for the elements of this element type that meet the CDB requirements. This value represents the Element Descriptor Length field multiplied by the number of element descriptors for this element type. This value does not include the 8-byte Element Status Page header, nor is it adjusted to match the allocation length. Element Descriptors The following sections contain the definitions for the following element descriptors: • Medium transport element • Storage elements • Import/Export elements • Data transfer elements Each element descriptor includes the element address, status flags, source storage element address, and barcode label. Some descriptors also contain extended status information. Additional sense code and qualifier information depends on the element type. PowerVault ML6000 SCSI Reference Guide 61

Section	Page
Contents	3
Tables	7
SCSI Command Support	11
Device Model	11
Controller Device Commands and Parameters	12
Media Changer Commands and Parameters	13
General Command Support Behavior	15
Multiple Initiator Support	15
Element Addressing	15
Command Status	15
Unit Attentions	16
Resets	16
Common CDB Fields	16
Reserved Fields	17
Online/Offline Operation	17
Supported Interfaces	17
SCSI Parallel Interface Support	17
Supported Messages	17
Fibre Channel Interface Support	18
Logical Libraries	19
Mailbox Behavior	19
Autocleaning	19
Removed Drives	20
SCSI Commands	21
Initialize Element Status - 07h	21
What the Library Does With This Command	21
Command Usage	21
Initialize Element Status CDB Format	22
Initialize Element Status With Range - E7h	23
What the Library Does With This Command	23
Command Usage	23
Initialize Element Status With Range CDB Format	23
Inquiry - 12h	25
What the Library Does With This Command	25
Command Usage	25
Inquiry CDB Format	25
Standard Inquiry Response	26
Vital Product Data Pages	27
Supported Vital Product Data Page (00h)	28
Unit Serial Number Page (80h)	29
Device Identification Page (83h)	30
Log Sense - 4Dh	34
What the Library Does with This Command	34
Command Usage	34
Log Sense CDB Format	34
Log Sense Response	35
Log Page Format	35
Supported Log Page (00h)	37
Tape Alert Log Page (2Eh)	37
Mode Select (6) - 15h	39
What the Library Does With This Command	39
Command Usage	39
Mode Select (6) CDB Format	39
Mode Parameter Header	40
Mode Select (10) - 55h	41
What the Library Does With This Command	41
Command Usage	41
Mode Select (10) CDB Format	41
Mode Parameter Header	42
Mode Sense (6) - 1Ah	43
What the Library Does With This Command	43
Command Usage	43
Mode Sense (6) CDB Format	43
Mode Sense (6) Response	44
Mode Parameter Header	44
Mode Sense (10) - 5Ah	45
What the Library Does With This Command	45
Command Usage	45
Mode Sense (10) CDB Format	45
Mode Sense (10) Response	46
Mode Parameter Header	46
Mode Pages	47
Disconnect-Reconnect Page (02h)	48
Fibre Channel Logical Unit Control Page (18h)	49
Fibre Channel Port Control Page (19h)	50
Informational Exceptions Control Page (1Ch)	51
Element Address Assignment Page (1Dh)	53
Transport Geometry Parameters Page (1Eh)	54
Device Capabilities Page (1Fh)	55
All Mode Pages (3Fh)	55
Move Medium – A5h	56
What the Library Does With This Command	56
Command Usage	56
Move Medium CDB Format	57
Persistent Reserve In – 5Eh	58
What the Library Does With This Command	58
Command Usage	58
Persistent Reserve In CDB Format	58
Persistent Reserve In Response	58
Read Keys Response	59
Read Reservations Response	60
Persistent Reserve Out – 5Fh	61
What the Library Does With This Command	61
Command Usage	61
Persistent Reserve Out CDB Format	61
Position to Element – 2Bh	63
What the Library Does With This Command	63
Command Usage	63
Position to Element CDB Format	63
Prevent Allow Medium Removal – 1Eh	64
What the Library Does With This Command	64
Command Usage	64
Prevent Allow Medium Removal CDB Format	64
Read Buffer – 3Ch	65
What the Library Does With This Command	65
Command Usage	65
Read Buffer CDB Format	65
Read Buffer Response	66
Read Element Status – B8h	68
What the Library Does With This Command	68
Command Usage	68
Read Element Status CDB Format	68
Read Element Status Response	70
Element Status Header	70
Element Status Page	71
Element Descriptors	71
Primary Volume Tag Field	72
Medium Transport Element Descriptor	72
Storage Element Descriptor	73
Import/Export Element Descriptor	74
Data Transfer Element Descriptor	75
Release Element – 17h	77
What the Library Does With This Command	77
Command Usage	77
Release Element CDB Format	77
Report LUNS – A0h	78
What the Library Does With This Command	78
Command Usage	78
Report LUNS CDB Format	78
Report LUNS Response	79
Request Sense – 03h	80
What the Library Does With This Command	80
Command Usage	80
Request Sense CDB Format	80
Request Sense Response	81
Additional Sense Codes and Qualifiers	82
Reserve Element - 16h	86
What the Library Does With This Command	86
Command Usage	86
Reserve Element CDB Format	86
Send Diagnostic - 1Dh	87
What the Library Does With This Command	87
Command Usage	87
Send Diagnostic CDB Format	87
Test Unit Ready (00h)	88
What the Library Does With This Command	88
Command Usage	88
Test Unit Ready CDB Format	88
Write Buffer (3Bh)	89
What the Library Does With This Command	89
Command Usage	89

Match case Limit results 1 per page

PowerVault ML6000 SCSI Reference Guide

Element Status Page

Each element status page consists of an eight-byte header, followed by one or more element descriptor

blocks. One Element Status Page header is returned for each grouping of element descriptor blocks, by

element type. The format of the Element Status Page header is shown in the following table.

Element Type Code

– This field indicates the specific element type being returned by the element

descriptors for this page.

PVolTag

– A value of one indicates that the primary volume tag field (barcode label) is present in each of

the element descriptor blocks that follow. A value of zero indicates that they are not present.

AVolTag

– Alternate Volume Tags are not supported. The returned value for this field is 0, and the alternate

volume tag fields are omitted from the element descriptors.

Element Descriptor Length

– This field indicates the number of bytes contained in a single element

descriptor. Refer to the individual element descriptor descriptions for each element type for their respective

possible lengths.

Byte Count of Descriptor Data Available

– This field indicates the number of element descriptor data

bytes available for the elements of this element type that meet the CDB requirements. This value represents

the Element Descriptor Length field multiplied by the number of element descriptors for this element type.

This value does not include the 8-byte Element Status Page header, nor is it adjusted to match the allocation

length.

Element Descriptors

The following sections contain the definitions for the following element descriptors:

•

Medium transport element

•

Storage elements

•

Import/Export elements

•

Data transfer elements

Each element descriptor includes the element address, status flags, source storage element address, and

barcode label. Some descriptors also contain extended status information. Additional sense code and

qualifier information depends on the element type.

Table 60