CD-ROM SCSI-2 COMMAND REFERENCE MANUAL VERSION 3.1 (OB-U0077C)

TABLE 1-5 SAMPLE COMMAND

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Bit

 

 

 

Byte

7

6

5

4

3

2

1

0

0

 

 

 

Operation Code (XXh)

 

 

 

1

 

Logical Number

 

 

Reserved

 

 

2

 

 

 

Logical Block Address (MSB)

 

 

 

3

 

 

 

Logical Block Address

 

 

 

4

 

 

 

Logical Block Address

 

 

 

5

 

 

 

Logical Block Address (LSB)

 

 

 

6

 

 

 

 

Reserved

 

 

 

7

 

 

 

Allocation Length (MSB)

 

 

 

8

 

 

 

Allocation Length (LSB)

 

 

 

9

 

 

 

 

Reserved

 

 

 

 

Operation Code :

XXh

 

 

 

 

 

Logical Unit Number specifies which Logical Unit the command applies to.

Logical Block Address specifies which Logical Block Address (LBA) the operation is to start.

Allocation Length is (depending on the command) the number of Logical Blocks or the number of bytes that the initiator is expecting to receive from the drive.

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