Quantum 10K II - Manual (Page 202)

SCSI Description
Quantum Atlas 10K II Ultra160/m SCSI Hard Disk Drives 5–135
5.20 READ (6) Command (08h)
The READ (6) command requests that data be transferred from the drive to the
initiator. The amount of data transferred is specified by the transfer length field. The
starting point is specified by the logical sector address.
Bit
Byte
7 6 5 4 3 2 1 0
0 Operation Code (08h)
1 Reserved Logical Block Address
2 - 3 Logical Block Address (continued)
4 Transfer Length
5 Control
Figure 5–56 READ (6) Command – Data Format
Table 5–63 READ (6) Command — Field Descriptions
Field Description
Logical Block Address Specifies the logical block address where the read operation will begin.
Transfer Length Specifies the number of contiguous logical blocks of data to transfer. A
transfer length of 0 indicates that 256 logical blocks will be transferred.
Any other value indicates the number of logical blocks that will be
transferred.