Dell PowerVault ML6000 Dell PowerVault ML6000 SCSI Reference Guide - Page 30

Device Identification h), Peripheral Qualifier, Peripheral Device Type, Code, Length

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Device Identification Page (83h) Table 13 Device Identification Page (83h) Byte Bit 7 6 5 4 3 2 1 0 0 Peripheral Qualifier Peripheral Device Type 1 Page Code (83h) 2 Reserved 3 Page Length (n-3) Identification Descriptors 4 First Identification Descriptor ... ... ... ... Last Identification Descriptor N 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. Peripheral Device Type - For Media Changer logical units, this field returns 01000b (08h) to indicate it is a Media Changer device. For the Controller logical unit, this field returns 01100b (0Ch) to indicate it is a Controller device. If an unsupported LUN was specified, this field returns 11111b (1Fh), which indicates that the device type is unknown. Page Code - Returned as 83h, indicating this page. Page Length - Returns the remaining number of bytes following this field. Identification Descriptors The general format of identification descriptors are as follows: Table 14 Identification Descriptors Byte Bit 7 6 5 4 3 2 1 0 0 Reserved 1 Reserved Association 2 Reserved 3 Identifier Length (n-3) 4 Identifier N Code Set - This field returns the following values: • 1h - the Identifier field contains binary values • 2h - the Identifier field contains ASCII characters Code Set Identifier Type 20 SCSI Commands

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20
SCSI Commands
Device Identification Page (83h)
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.
Peripheral Device Type
– For Media Changer logical units, this field returns 01000b (08h) to indicate it is
a Media Changer device. For the Controller logical unit, this field returns 01100b (0Ch) to indicate it is a
Controller device. If an unsupported LUN was specified, this field returns 11111b (1Fh), which indicates that
the device type is unknown.
Page Code
– Returned as 83h, indicating this page.
Page Length
– Returns the remaining number of bytes following this field.
Identification Descriptors
The general format of identification descriptors are as follows:
Code Set
– This field returns the following values:
•
1h – the Identifier field contains binary values
•
2h – the Identifier field contains ASCII characters
Table 13
Device Identification Page (83h)
Bit
Byte
7
6
5
4
3
2
1
0
0
Peripheral Qualifier
Peripheral Device Type
1
Page Code (83h)
2
Reserved
3
Page Length (n-3)
Identification Descriptors
4
First Identification Descriptor
...
...
...
...
Last Identification Descriptor
N
Table 14
Identification Descriptors
Bit
Byte
7
6
5
4
3
2
1
0
0
Reserved
Code Set
1
Reserved
Association
Identifier Type
2
Reserved
3
Identifier Length (n-3)
4
Identifier
N