User Manual

SCSI Commands Reference Manual, Rev. J 41
www.seagate.com General Concepts
A 32-byte variable length CDB format is defined for long LBA operations (see table 7)
Table 7 Typical variable length CDB for long LBA 32-byte commands
Bit
Byte
7 6 5 4 3 2 1 0
0
OPERATION CODE (7Fh)
1
CONTROL
2
Miscellaneous CDB information
3
Miscellaneous CDB information
4
Miscellaneous CDB information
5
Miscellaneous CDB information
6
Miscellaneous CDB information
7
Additional CDB Length (n–7) [9]
8
(MSB)
SERVICE ACTION
9
(LSB)
10
Miscellaneous CDB information DPO FUA Miscellaneous CDB information
11
Miscellaneous CDB information
12
(MSB)
LOGICAL BLOCK ADDRESS
. . .
19
(LSB)
20
(MSB)
Miscellaneous CDB information
. . .
27
(LSB)
28
(MSB)
TRANSFER LENGTH (If required)
PARAMETER LIST LENGTH (if required)
ALLOCATION LENGTH (if required)
. . .
31
(LSB)