Disk Drive Errors; Verifying The Built-In Scsi Controller - Sun Microsystems SPARC classic Service Manual

4.3

Disk Drive Errors

TABLE 4-3
TABLE 4-3
Symptom
Read, write, or parity error
reported by the operating system
or applications.
Drive fails to boot or does not
respond to commands.
Slow disk drive response.
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 C.1.5 "Probe-scsi,
Probe-scsi-all" on page C-7.
At the ok prompt, type
See the following example.
ok probe-scsi
Target 1
Unit 0
Target 3
Unit 0
4-6 SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual • November 1993
presents disk drive error conditions and corrective actions.
Troubleshooting Disk Drive Errors
probe-scsi
Disk SEAGATE ST1480
Disk SEAGATE ST1480
Corrective Action
Replace the disk drive indicated by the failure
message. The operating system identifies the internal
disk drive 0 (SCSI target ID 3) as sd0 and internal disk
drive 1 (SCSI target ID 1) as sd1.
SCSI controller may be defective. See Section 4.3.1
"Verifying the Built-In SCSI Controller." If SCSI
controller is OK, the SCSI ID jumpers or configuration
jumpers may be set incorrectly. Refer to Chapter 9
"Storage Devices.
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.
.
SUN0424 Copyright
SUN0424 Copyright
(c) 1991
(c) 1991