Sun Microsystems SPARCstation 20, Service Manual

Page: 37 / 266

Chapter 2 Troubleshooting Overview 13
test disk
test disk0
test disk1
test disk2
test disk3 Tests internal or external SCSI disks
that have self-test diagnostic programs
on the drive controller The disk drive must be spinning before this
test is executed; enter a
boot
disk alias
command to cause the drive to spin up.
test cdrom
Performs a self-test diagnostic on the
CD-ROM drive The CD-ROM drive must be set to SCSI
address 6 and have a CD inserted.
test tape
test tape0
test tape1 Tests the SCSI tape drive by executing
the drive self-test program;
tape
and
tape 0
are the first tape drive.
tape
1
is the second tape drive
The tape drive must be set to SCSI address 4
(
tape 0
) or address 5 (
tape 1
) and a tape
must be installed.
test ttya
test ttyb Tests serial ports. Outputs an
alphanumeric test pattern on the
system serial ports Attach a terminal to the serial port to observe
the output.
test keyboard
Executes the keyboard self-test; four
keyboard LEDs should flash on once
and the message,
Keyboard
Present, is
displayed
Keyboard must be connected.
test-memory
Tests main memory Set
diag-switch?
to true or set
selftest-
#megs
to the desired parameter.
test-all
Tests all system devices (such as SBus
cards) with built-in test programs;
hard disks, tapes, and CD-ROMs are
not tested Set the
diag-switch?
parameter to true.
watch-clock
Displays seconds from the NVRAM/
TOD chip None.
watch-net
Monitors Ethernet packets on the
auto-selected Ethernet cable connected
to the system A cable must be connected to the back panel
Ethernet port.
watch-aui
Monitors Ethernet packets (10Base5—
Thicknet) on the Ethernet cable
connected to the system A cable must be connected between the rear
panel AUI Ethernet port and the Ethernet
transceiver.
watch-tpe
Monitors Ethernet packets
(10Base_T—twisted-pair Ethernet) on
the Ethernet cable connected to the
system A cable must be connected between the rear
panel TPE port and a TPE hub.
watch-net-all
Monitors Ethernet packets on all
Ethernet interfaces installed in the
system Cables must be connected to all Ethernet ports
being tested.
TABLE 2-3
OpenBoot PROM Diagnostic Tests (Continued)
Type of Test Description Preparation