Sun Microsystems 220R manual SCSI Controller Failure, At the ok prompt, type

2.If the SCSI device responds correctly to probe-scsi-all, a message similar to the “probe-scsi-all output:” on page 146 is printed out.

If the device responds and a message is displayed, the system SCSI controller has successfully probed the device. This indicates that the main logic board is operating correctly.

a.If one drive does not respond to the SCSI controller probe but the others do, replace the unresponsive drive.

b.If only one internal disk drive is configured with the system and the probe-scsi-alltest fails to show the device in the message, replace the drive.

c.If the problem is still evident after replacing the drive, replace the main logic board.

d.If replacing both the disk drive and the main logic board does not correct the problem, replace the associated UltraSCSI data cable and UltraSCSI backplane.

SCSI Controller Failure

To check whether the main logic board SCSI controllers are defective, test the drive response to the probe-scsicommand. To test additional SCSI host adapters added to the system, use the probe-scsi-allcommand. You can use the OBP printenv command to display the OpenBoot PROM configuration variables stored in the system NVRAM. The display includes the current values for these variables as well as the default values. See “OBP printenv Command” on page 145 for more information.

1.At the ok prompt, type:

ok probe-scsi

If a message is displayed for each installed disk, the system SCSI controllers have successfully probed the devices. This indicates that the main logic board is working correctly.

2.If a disk doesn’t respond, replace the unresponsive drive.

3.If the problem remains after replacing the drive, contact your qualified service provider to replace the associated SCSI cable and backplane.

Chapter 7 Diagnostics and Troubleshooting 151