Sun Microsystems SPARCstation 4, Service Manual

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4-6 SPARCstation 4/Xterminal 1 Service Manual • January 1995
Note – This table does not apply to the SPARC Xterminal 1 system.
4.3.1 Verifying the Built-In SCSI Controller
To check whether the built-in SCSI controller is defective, test the drive response to
the
probe-scsi
command. To test additional SCSI host adapters added to the
system, use the
probe-scsi-all
command. Refer to Section D.1.6 “module-info.
Note –
This test does not apply to the SPARC Xterminal 1 system.
● At the
ok
prompt, type
probe-scsi
See the following example.
TABLE 4-3
Troubleshooting Disk Drive Errors
Symptom Corrective Action
Read, write, or parity error
reported by the operating system
or applications. Replace the disk drive indicated by the failure
message. Solaris 1.x operating systems identify the
internal disk drive (SCSI target ID 3) as
sd0
. With
Solaris 2.x operating systems, the drive is identified
as
c0t3d0
.
Drive fails to boot or does not
respond to commands. SCSI controller may be defective. See Section 4.3.1
“Verifying the Built-In SCSI Controller.” Verify that
each SCSI device is assigned a unique SCSI target
address. See Appendix C for important additional
information.
Slow disk drive response. If many SCSI devices are connected to the same SCSI
bus and if some of these devices, such as the 1.05-
Gbyte disk drive, are “fast SCSI” devices, you may
want to install an FSBE/S SCSI host adapter card to
the “fast SCSI” devices and put these “fast SCSI”
devices on a separate SCSI bus to speed up disk
drive response.
ok probe-scsi
Target 3
Unit 0 Disk SEAGATE ST3610N SUN0535881200054301