Hitachi Ultrastar 15K450 (FC-AL) Hard Disk Drive Specification
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19.19 READ (32) - (7F/09)Table 179:Read (32) - (7F/09)
The READ command requests that the drive transfer data from disk to the initiator. Each logical block transferred includes
user data and may include protection information, based on the RDPROTECT field and the drive format.
If the RTO_EN bit is set to zero in the READ CAPACITY (16) parameter data, Check Condition status will be returned with
sense key of Illegal Request and additional sense code of Invalid Command Operation Code. If RTO_EN is one, this com-
mand will be processed normally.
Byte Bit
76543210
0 Command Code = 7Fh
1 VU = 0 Reserved = 0 FLAG LINK
2-5 Reserved = 0
6 Reserved = 0 Group Number = 0
7 Additional CDB Length = 18h
8 - 9 Service Action = 0009h
10 RDPROTECT DPO FUA Rsvd=
0FUA_
NV Rsvd=0
11 Reserved = 0
12 -19
(MSB)
Logical Block Address
(LSB)
20 - 23
(MSB)
Expected Initial Logical Block Reference Tag
(LSB)
24 - 25
(MSB)
Logical Block Application Tag
(LSB)
26-27
(MSB)
Logical Block Application Tag Mask
(LSB)
28 - 31
(MSB)
Transfer Length
(LSB)