HP C2246 Technical Reference Manual page 62

Change Definition
The CHANGE DEFINITION command requests the Target to change to the operating
definition specified in the Definition Parameter field for all further interaction with subsequent
Initiators. ·
Change Definition Command Description Block (COB)
Bit
Byte
7
I
6
I
5
I
4
I
3
I
2
I
l
I
0
00 Opcode= 40H
01
Logical Unit Number
I
Reserved
02 Reserved
I
Save
03
Reserved
I
Definition Parameter
04-07
Reserved
08 Parameter List Length= 0
09 Control Byte
Save. This bit is ignored by the Target. The Target will save the new operating definition
regardless of the state of the Save bit. No error will be declared based on the state of this bit.
Definition Parameter. This field indicates the new operating definition the Target is to use
after the command is implemented. Any value other than those listed below will result in a
status of Check Condition and a sense key of Illegal Request.
Field Value Operating Definition
00 The current Operating Definition is not changed
01 SCSI X3.131-1986
1
02 SCSI (CCS)
1
03 SCSI-2 X3.131-19xx
1.
The implementation of SCSI X3.131-1986 and SCSI (CCS) is identical in these
products.
Parameter List Length. Any value other than 0 (zero) will be rejected with a Status of
CHECK CONDITION and a Sense Key of ILLEGAL REQUEST.
A·6 SCSI Command Descriptions