Quantum 10K II - Manual (Page 90)

SCSI Description
Quantum Atlas 10K II Ultra160/m SCSI Hard Disk Drives 5–23
5.9 CHANGE DEFINITION Command (40h)
The CHANGE DEFINITION command sets the SCSI compliance for disk drives
with parallel SCSI interfaces to one of four different levels: SCSI-1, SCSI-1/CCS,
SCSI-2 or SCSI-3.
Bit
Byte
7 6 5 4 3 2 1 0
0 Operation Code (40h)
1 Reserved
2 Reserved Save
3 Rsv’d
New Operating Definition
(0, 1, 2, 3, or 4 are legal values for Parallel SCSI Disk Drives)
4 - 7 Reserved
8 Parameter Data Length
9 Control
Figure 5–3 CHANGE DEFINITION Command Descriptor Block — Data Format