HP Surestore 660ex Optical Drive and Library SCSI-2 Command Reference - Page 65
Inquiry Command 12H, Table 2-24, Unique Media ID C1H
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Table 2-24 SCSI-2 Drive Command Set Inquiry Command (12H) Unique Media ID Page (C1H) Byte 7 6 5 4 3 2 1 0 0 Peripheral Qualifier Peripheral Device Type 1 Page Code (C1H) 2 Reserved (0) 3 Page Length (08H) 4-5 Unique Media ID Bytes 1-2 6-8 Unique Media ID Bytes 3-5 9-11 Unique Media ID Bytes 6-8 The Unique Media ID Bytes 1-2 field is "HP" in ASCII. The Unique Media ID Bytes 3-5 field is a three-byte binary representation of the serial number of the drive which wrote the UMID on the media. The Unique Media ID Bytes 6-8 field is a three-byte random number. 2-28 Chapter 2
SCSI-2 Drive Command Set
Inquiry Command (12H)
Chapter 2
2-28
The Unique Media ID Bytes 1-2 field is “HP” in ASCII.
The Unique Media ID Bytes 3-5 field is a three-byte binary
representation of the serial number of the drive which wrote the UMID
on the media.
The Unique Media ID Bytes 6-8 field is a three-byte random number.
Table 2-24
Unique Media ID Page (C1H)
Byte
7
6
5
4
3
2
1
0
0
Peripheral Qualifier
Peripheral Device Type
1
Page Code (C1H)
2
Reserved (0)
3
Page Length (08H)
4-5
Unique Media ID Bytes 1-2
6-8
Unique Media ID Bytes 3-5
9-11
Unique Media ID Bytes 6-8