Dssi Device Internal Tests - DEC 4000 AXP Service Manual

Table 3–1 (Cont.) Summary of Diagnostic and Related Commands
Command Function
Extended Testing/Troubleshooting
memexer Exercises memory by running a specified number of
memory tests. The tests are run in the background.
memexer_mp Tests memory in a multiprocessor system by running
a specified number of memory exerciser sets. The
tests are run in the background.
exer_read Tests a disk by performing random reads on the
specified device.
exer_write Tests a disk by performing random writes to the
specified device.
fbus_diag Initiates onboard tests for a specified Futurebus+
device.
show_mop_ Displays the MOP counters for the specified
counter Ethernet port.
clear_mop_ Initializes the MOP counters for the specified
counter Ethernet port.
Loopback Testing
exer Conducts loopback tests for the specified console
port.
netexer Conducts loopback tests for the Ethernet ports.
Diagnostic-Related Commands
kill Terminates a specified process.
kill_diags Terminates all currently executing diagnostics.

3.2 DSSI Device Internal Tests

A DSSI storage device may fail either during initial power-up or during normal
operation. In both cases, the failure is indicated by the lighting of the red Fault
LED on the drive's front panel.
If the drive is unable to execute the Power-On Self-Test (POST) successfully, the
red Fault LED remains on and the Run/Ready LED does not come on, or both
LEDs remain on.
3–22 Running System Diagnostics
Reference
Section 3.1.5
Section 3.1.6
Section 3.1.7
Section 3.1.8
Section 3.1.9
Section 3.1.10
Section 3.1.11
Section 3.1.12.1
Section 3.1.12.2
Section 3.1.13
Section 3.1.13