Chapter 6 Diagnostics 6-13
6.6 OpenBoot Commands
OpenBoot commands are commands you type from the ok prompt. OpenBoot
commands which can provide useful diagnostic information are:
■ probe-scsi
■ probe-ide
■ show-devs
6.6.1 probe-scsi Command
The probe-scsi command is used to diagnose problems with SCSI devices.
Caution – If you used the halt command or the Stop-A key sequence to reach the
ok prompt, then issuing the probe-scsi command can hang the system.
The probe-scsi command communicates with all SCSI devices connected to on-
board SCSI controllers.
For any SCSI device that is connected and active, the probe-scsi command
displays its loop ID, host adapter, logical unit number, unique World Wide Name
(WWN), and a device description that includes type and manufacturer.
The following is sample output from the probe-scsi command.
CODE EXAMPLE 6-2 Sample probe-scsi Command Output
{1} ok probe-scsi
Target 0
Unit 0 Disk SEAGATE ST336605LSUN36G 0238
Target 1
Unit 0 Disk SEAGATE ST336605LSUN36G 0238
Target 2
Unit 0 Disk SEAGATE ST336605LSUN36G 0238
Target 3
Unit 0 Disk SEAGATE ST336605LSUN36G 0238
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