6.2 Diagnostic Procedures
6.2 Diagnostic Procedures
The standard DECmpp 12000/Sx system diagnostics test the front-end interface,
the array control unit (ACU), the processor element (PE) array, and the PE
array/router connections. Additional diagnostics test the Parallel VME 6U
Adapter PCB, the VME 6U interface PCB, and the PDA disk array controller.
Caution
Running diagnostic programs can cause the system to crash, especially
if the programs encounter problems. You should warn the users and
prepare the system for a possible crash before running diagnostics. It is a
good policy not to run diagnostics while users are on the system.
Avoid aborting any diagnostic program. In particular, do not abort the
process while any diagnostic is running. Diagnostic programs change
the system microcode, and then replace it when they are done. If they
are aborted, they leave the system in an unknown state. If this should
happen, you can recover by entering either:
# dpuboot -v
or:
# mpshutdown
# dpumanager
6.3 Diagnostic Environment
Table 6–1 shows the PDA top-level programs and the level-2 programs and
describes what each one tests. The individual diagnostics are described following
this table.
Table 6–1 Diagnostic Programs
Top Level
Description
Level Two
Description
vme_diags
DECmpp 12000
/Sx extended
VME
mpda
Parallel VME 6U Adapter CSR test
vme
Memory 6U Adapter test
da_diag
Tests PDA
da_intern
DA controller PCB test
da_config
R/W configuration test
da_buff
R/W buffer test
da_mount
Mount bank test
da_seek
Read/seek test
da_disk
R/W disk test
Parallel Disk Array Diagnostics 6–3
