HP C2246 Technical Reference Manual page 127

Change SCSI ID
Change SCSI ID
The CHANGE 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 bCSI bus reset is performed. This allows the Initiator to change the ID'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= ClH
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
pin sets 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 2; LSB
=
bit O.
Vendor Unique command Descriptions B-1