Dell PowerVault ML6000 Dell PowerVault ML6000 SCSI Reference Guide - Page 73

Storage Element Descriptor, Primary Volume Tag

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Additional Sense Code Qualifier - If the element is in an abnormal state, this field will be set to a value as described in Table 71 on page 72. Source Valid (Svalid) - This field is set to 1 if the Source Storage Element Address field is valid, otherwise it is set to 0. Invert - This field is set to 0. The library does not support inverting media. Source Storage Element Address - If the Source Valid field is set to 1, this field will contain the element address of the last storage element the media was in. Since the medium transport element cannot be a destination element, this would be an abnormal condition. Primary Volume Tag - This field will normally return spaces if the primary volume tag is requested, since the medium transport element cannot be a destination element. In certain error situations, a volume tag will be returned to indicate which cartridge may be stranded within the picker. Storage Element Descriptor Table 62 Storage Element Descriptor Byte Bit 7 6 5 4 3 2 1 0 0 Element Address 1 2 Reserved Access Except Rsvd Full 3 Reserved 4 Additional Sense Code 5 Additional Sense Code Qualifier 6 Reserved 8 9 Svalid Invert Reserved 10 Source Storage Element Address 11 12 Primary Volume Tag Information 47 (Field omitted if PVolTag = 0; remaining fields move up) 48 Reserved 51 Element Address - This field contains the element address of the storage element. Access - This field is set to 1 if access by a medium transport element is allowed. It is set to 0 if access is denied. Except - This field is set to 1 if the element is in an abnormal state. Additional information may be available in the Additional Sense Code and Additional Sense Code Qualifier fields. If this field is 1, the primary volume tag information could be invalid. This field is set to 0 if the element is in a normal state. Full - This field is set to 0 if the element does not contain media. It is set to 1 if it does. Additional Sense Code - If the element is in an abnormal state, this field will be set to a value as described in Table 71 on page 72. PowerVault ML6000 SCSI Reference Guide 63

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PowerVault ML6000 SCSI Reference Guide
63
Additional Sense Code Qualifier
– If the element is in an abnormal state, this field will be set to a value
as described in
Table 71
on page 72.
Source Valid (Svalid)
– This field is set to 1 if the Source Storage Element Address field is valid, otherwise
it is set to 0.
Invert
– This field is set to 0. The library does not support inverting media.
Source Storage Element Address
– If the Source Valid field is set to 1, this field will contain the element
address of the last storage element the media was in. Since the medium transport element cannot be a
destination element, this would be an abnormal condition.
Primary Volume Tag
– This field will normally return spaces if the primary volume tag is requested, since
the medium transport element cannot be a destination element. In certain error situations, a volume tag will
be returned to indicate which cartridge may be stranded within the picker.
Storage Element Descriptor
Element Address
– This field contains the element address of the storage element.
Access
– This field is set to 1 if access by a medium transport element is allowed. It is set to 0 if access is
denied.
Except
– This field is set to 1 if the element is in an abnormal state. Additional information may be available
in the Additional Sense Code and Additional Sense Code Qualifier fields. If this field is 1, the primary volume
tag information could be invalid. This field is set to 0 if the element is in a normal state.
Full
– This field is set to 0 if the element does not contain media. It is set to 1 if it does.
Additional Sense Code
– If the element is in an abnormal state, this field will be set to a value as described
in
Table 71
on page 72.
Table 62
Storage Element Descriptor
Bit
Byte
7
6
5
4
3
2
1
0
0
Element Address
1
2
Reserved
Access
Except
Rsvd
Full
3
Reserved
4
Additional Sense Code
5
Additional Sense Code Qualifier
6
Reserved
8
9
Svalid
Invert
Reserved
10
Source Storage Element Address
11
12
Primary Volume Tag Information
(Field omitted if PVolTag = 0; remaining fields move up)
47
48
Reserved
51