Command Descriptor Block; Table 3-2 6-Byte Command Descriptor Block; Table 3-3 10-Byte Command Descriptor Block; Table 3-4 12-Byte Command Descriptor Block - Oracle StorageTek T10000 Reference Manual

Command Descriptor Block

Command Descriptor Block
Initiators use three types of CDBs to communicate commands to the targets:
• 6–Byte commands
• 10–Byte commands
• 12-Byte commands
• 16-Byte commands
The first byte in the command descriptor block contains an operation code.

TABLE 3-2 6-Byte Command Descriptor Block

Byte 7
0
1
2 (MSB)
thru
4
5

TABLE 3-3 10-Byte Command Descriptor Block

Byte 7
0
1
2 (MSB)
thru
8
9

TABLE 3-4 12-Byte Command Descriptor Block

Byte 7
0
1
2 (MSB)
thru
9
10
40 T10000: Interface Reference Manual
(TABLE
(TABLE
(TABLE
(TABLE
6 5
Reserved
Command Parameters
6 5
Reserved
Command Parameters
6 5
Reserved
Command Parameters
3-2)
3-3)
3-4)
3-5)
Bit
4 3
Operation Code
Command Parameters
Control Byte
Bit
4 3
Operation Code
Command Parameters
Control Byte
Bit
4 3
Operation Code
Command Parameters
Reserved
2 1 0
2 1 0
2 1 0
August 2016
(LSB)
(LSB)
(LSB)