Sun Microsystems Ultra 1 140, Service Manual

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4-8 Sun Ultra 1 Series Service Manual—November 1995
4
If the drives respond and a message is displayed, the system's SCSI controller
has successfully probed the devices. This is an indication that the system's
main logic board is working correctly. If one drive does not respond to the
probe but the others do, replace the unresponsive drive.
If your system has only one internal disk drive and the
probe-scsi
test fails
to show the device in the message, replace the drive. If after replacing the drive
the problem still persist, replace the main logic board. If replacing both the
disk drive and the main logic board does not correct the problem, replace the
internal disk drive cable and SCSI backplane assembly.
4.5 OpenBoot On-Board Diagnostics
4.5.1
watch-clock
This test reads a register in the NVRAM/TOD (Non-Volatile RAM/Time of
Day) chip on the main logic board and displays the result as a seconds counter.
The counter should count from 0 to 59 repeatedly until you interrupt it by
pressing any key on the keyboard.
ok probe-scsi
Target 0
Unit 0 Disk SEAGATE ST5660N SUN1.050638DX168801
Copyright (c) 1993 Seagate
All rights reserved 0000
Target 1
Unit 0 Disk SEAGATE ST5660N SUN1.050638DX168801
Copyright (c) 1993 Seagate
All rights reserved 0000
Target 6
Unit 0 Removable Read Only device TOSHIBA XM-
5301TASUN4XCD173506/22/95