User's Guide

Chapter 2 Emulated Medium Changer SCSI Commands
Send Diagnostic (1Dh)
100 Quantum DX-Series Software Interface Guide
Send Diagnostic (1Dh) 2
The DX-Series system includes a built-in self-test. This test is
automatically performed when the DX-Series system is turned on. It can
also be performed by issuing the Send Diagnostic command to the DX-
Series system.
• If the self-test passes, a Good status is returned
• If the self-test fails, a check condition status is returned and the sense
key is set to Hardware Error. The Additional Sense fields identify
the type of failure
The description of the Request Sense command tells how to get the
Sense data from the DX-Series system and how to interpret the Sense
data fields. The format of the Send Diagnostic command is shown in
table 65.
Table 65 Send
Diagnostic Command
Bit/Byte 7 6 5 4 3 2 1 0
0
1
2
3
4
5
• Logical Unit Number
The Logical Unit Number must always be set to 0. This field
indicates the logical unit to which the command is sent.
•PF
A page format bit of one specifies that the Send Diagnostic
parameters conform to the page structure as specified in the SCSI-2
specification. This bit must be set to 1.
Operation Code (h)
Logical Unit Number PF (1)
Reserved
(0)
Self TestDev-OfL
Unit-
OfL
Reserved (00h)
(MSB)
Parameter List Length
(LSB)
Reserved (00h)