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5-12 Maxtor Atlas 10K V
5.7 CHANGE OPERATING DEFINITION (40h)
The CHANGE DEFINITION command shown in Table 5-9 and Table 5-10 set 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.
Table 5-9 CHANGE DEFINITION Command Descriptor Block-Data Format
Table 5-10 CHANGE DEFINITION-Field Descriptions
Bit
Byte
765 4 3210
0 Operation Code (40h)
1 Reserved
2 ReservedSave
3 Rsv’d New Operating Definition
(0, 1, 2, 3, 4, 5 and 6 are legal values for Parallel SCSI Disk Drives)
4 - 7 Reserved
8 Parameter Data Length
9 Control
Field Description
Save
Save Parameters. When this field is set to 1, the new op-
erating definition is saved in the drive's non-volatile
memory.
New Operating Definition
The values that can be supplied in the field are listed be-
low:
0 Current Definition
1 SCSI-1
2 SCSI-1/CCS (Common Command Set)
3 SCSI-2
4 SCSI-3
5 SCSI-3 U160
6 SCSI-3 U320
Parameter Data Length
Length, in bytes, of the parameter data.
Must be 0.