IBM 3531 manual Locations Getting started

Problem indicator	FRU/Action
Amber LED on and green ac power	1.	Make sure AC power is good at the source.
LED off on power supply	2.	Power Cord
	3.	Power supply
Green LED on (Drive CRU ID=6)	1.	If not currently cluster configured, power cycle the
		Netfinity EXP300 to re-enable ID=6.
One or more green LEDs off (one or	( No activity to the drive. No action is required.)
two drive CRUs)
One or more green LEDs off (all	( No activity to the drive. No action is required.)
drive CRUs or those on one bus)	1.	Check SCSI-bus cables and connections.
	2.	Use RAID management software to check the SCSI-bus
		status.
	3.	ESM board
One or more green LEDs off (front	1.	Make sure the cables are plugged in and power supplies
panel)		are turned on.
	2.	Power supply
Intermittent or sporadic power loss	1.	Check the ac power source
to the expansion unit	2.	Resecure all installed power cables and power supplies
	3.	Power supply
Unable to access drives on one or	1.	Make sure SCSI cables are undamaged and properly
both SCSI buses		connected.
	2.	Check the drive SCSI ID settings. Ensure that option
		switches 1 and 3 (inside the switch card) are set to the
		appropriate positions.
		Attention:
		Change switch positions only when your host server and
		expansion unit is turned off.
	3.	ESM board
	4.	Bridge card (All high address or all low address hard-
		disk drive failed)
Random errors	1.	Mid-plane

Locations

Getting started

You can install the EXP300 expansion unit in the following types of enclosures:

•An Electronic Industries Association (EIA) 310 standard rack cabinet

•The IBM Netfinity EXP300 Rack-to-Tower Conversion Kit

•An IBM Netfinity NetBAY enclosure

8IBM Netfinity EXP300 - Type 3531 Hardware Maintenance Manual