Technical information

HGST Ultrastar C15K600 Hard Disk Drive Specification
76
17.6.1
Command Information Unit
The COMMAND frame is sent by an SSP initiator port to request that a command be processed by the drive.
Table 42 COMMAND Information Unit
Byte
Bit
7 6 5 4 3 2 1 0
0-7
Logical Unit Number
8
Reserved
9
Disable First Burst=0 Reserved
Task
Attribute
10
Reserved
11
Additional CDB Length (in Dwords) Reserved
12-27
CDB
28-n
Additional CDB Bytes
 Logical Unit Number contains the address of the logical unit. The drive only supports a LUN of 0’s.
 Disable First Burst is not supported by the drive
 Task Attribute is defined as follows:
Table 43 Task Attribute Field
Value
Attribute
000b
Simple_Q
001b
Head_of_Q
010b
Ordered_Q
100b
ACA_Q (not supported)
101b
Reserved
 Additional CDB Length contains the length in Dwords (four bytes) of the ADDITIONAL CDB field.
 CDB and Additional CDB Bytes together contain the CDB.