User's Guide

Chapter 2 Emulated Medium Changer SCSI Commands
Send Diagnostic (1Dh)
Quantum DX-Series Software Interface Guide 101
• Self Test, DevOfL and UnitOfL
Table 66 illustrates how the “Seltst,” “DevOfl,” and “UnitOfl” bits
determine which test to be performed.
Table 66 Selftest Bit
Definition
0 0 0
0 0 1
0 1 0
0 1 1
1 0 0
1 0 1
1 1 0
1 1 1
These tests verify that all major DX-Series system subsystems are
working as follows:
• Electronics Self-Test (Selftest 1)
Performs tests such as CPU Functionality, Buffer RAM Integrity
and ROM Checksum. This test does not move any mechanical
components.
• Functionality Test (Selftest 2)
Selftst DevOfl UnitOfl Selftest Action
Illegal Combination
No-Op
Illegal Combination
No-Op
Selftest 1
Selftest 2
No-Op
Selftest 2
Tech Tip: The following tests are not supported by DX-Series
system. A good status will always be returned when
queried.