Sun Microsystems Netra t 1120, Service Manual

Page: 52 / 148

4-4 Netra t 1120/1125 Service Manual • August 1998
Note – If POST is to be bypassed, type
setenv diag-switch? false
at the
ok
prompt.
Action
Test the drive response to the
probe-scsi
command as follows:
● At the system
ok
prompt:
a. Type
reset-all
.
b. Type
probe-scsi
.
If the drives respond and a message is displayed, the system SCSI controller has
successfully probed the devices. This indicates that the system board is operating
correctly.
If one drive does not respond to the SCSI controller probe but the others do, replace
the unresponsive drive as described in Section 9.1 “Hard Disk Drive” on page 9-2 or
Section 9.2 “Removable Media Drive” on page 9-5.
If one internal disk drive is configured with the system and the
probe-scsi
test
fails to show the device in the message, replace the drive as described in Section 9.1
“Hard Disk Drive” on page 9-2 or Section 9.2 “Removable Media Drive” on page 9-5.
If the problem is still evident after replacing the drive, replace the SCSI backplane
assembly as described in Section 9.3 “SCSI Backplane” on page 9-8.
If replacing both the disk drive and the SCSI backplane assembly does not correct
the problem, replace the motherboard as described in Section 10.7 “Motherboard” on
page 10-24.