IBM 704 manual Led

Troubleshooting

The following table describes the SCSI drive status conditions that the LEDs indicate.

Power	Drive	Drive	Status
On LED	In-Use	Fault
	LED	LED
On	Off	Off	Hot-swap drive is present;
			power to the drive is on.
On	Blinking	Off	Hot-swap drive is present;
			power to the drive is on. The
			drive is in use.
Off	Off	On	The drive has a problem, and
			can be replaced.
On	Off	Blinking	Disk-array models only: The
		slowly	drive should not be replaced at
			this time. The drive has just
			been replaced, and the disk
			array is being rebuilt. Power
			to the drive is on.
Off	Off	Off	No drive is installed in the
			bay.
			If a drive is present, but the
			LEDs are off, check the cable
			connections to the SCSI
			backplane.

260PC Server 704 User's Handbook