HP C2246 Technical Reference Manual page 128

Change Wide SCSI ID
The CHANGE WIDE SCSI ID command instructs the Target to change its address to that
supplied in the SCSI ID field. The Target will accept the command at any time, but will not
change the ID until a SCSI bus reset is performed. This allows the Initiator to change the
!D's of up to seven targets without duplication.
If power is lost, the Target's SCSI ID source will revert to the address pinsets when power
is
restored.
Rezero Unit Command Descriptor Block (COB)
Bit
Byte
7
I
6
I
5
I
4
I
3
I
2
I
1
I
0
00
Opcode= C2H
01 Logical Unit Number
I
Reserved
02-03 Reserved
04
Reserved
I
IDCF
I
SCSI ID
05 Control Byte
IDCF (ID Control Field).
If IDCF = 0: The SCSI ID field is ignored and the drive obtains its ID from the address
pinsets at
the next bus
reset.
If IDCF
=
1: The drive obtains its ID from the SCSI ID field in byte 4 at the next bus
reset.
SCSI ID. Provides the new SCSI address: MSB
=
bit 3; LSB = bit 0.
B-8 Vendor Unique Command Descriptions