Send Diagnostic - HP C2488A Technical Reference Manual

Send Diagnostic
Send Diagnostic
The SEND DIAGNOSTIC command requests the Target to execute the specified diagnostic
testes) upon itself. When successfully completed, the SEND DIAGNOSTIC command will
be terminated with a GOOD status. The results of a SEND DIAGNOSTIC command are
reported with the RECEIVE DIAGNOSTIC RESULTS command.
Send Diagnostic Command Descriptor Block (CDB)
Bit
Byte
7
I
6
I
5
I
4
I
3
I
2
I
1
I
0
00 Opcode = IDH
01 Logical Unit Number
I
PF
I
Reserved
I
S/TEST
I
DEVOFL
I
UNTOFL
02 Reserved
03-04 (MSB=03) Parameter List Length (LSB=04)
05 Control Byte
Activity Qualifiers. These bits tell the Target what diagnostics are allowed. If the selected
diagnostic cannot be executed in its entirety, it will not be executed at all.
UNTOFL
DEVOFL
SjTEST
PF
Unit Offline: Ignored by the Target.
Device Offline: Ignored by the Target.
Self-Test: If set to one (1), the PF bit will be ignored, the Parameter List
Length field must be 0, and the Target will execute the Default Self-Test. If
set to zero (0), no self-test will be executed.
Page Format: Must be set to 1 (one) for the Target to recognize any following
pages. Note: If
SjTEST
is set to 1 (one), the Target will ignore the PF bit.
Parameter List Length. Specifies the length in bytes of the parameter pages to be transferred
to the Target. A value of zero indicates that no data will be transferred. The target supports
the following pages:
OaR Supported Diagnostic Pages (Length
=
0004R)
40R
Translate Address Page (Length = OOOER)
Refer to the following pages for parameter page formats.' If the Initiator sends a parameter
length that does not match the supported page lengths, the target will terminate the
command with:
DRAFT
1/18/93 09:58
Status: Check Condition
Sense Key: illegal Request
Additional Sense Code: Invalid Field in CDB
SCSI Command Descriptions A-51