Troubleshooting
41
4.5 Drive Carrier Module Faults
Disk drive status is monitored by a Green LED and an Amber LED mounted on the front of each Drive
Carrier Module, providing the following indications:
1
Drive Activity - LED may be off for a length of time during power up.
4.5.1 Dummy Carrier Modules
Dummy carrier modules must be fitted to all unused drive bays to maintain a balanced air flow.
4.6 Dealing with Hardware Faults
Ensure that you have obtained a replacement module of the same type
before
removing any faulty
module.
Warning
If the IBM System Storage DCS9900 3S2 Storage Expansion Unit is powered up and you remove
any module, replace it immediately. If the subsystem is used with modules or module blanks
missing for more than a few minutes, the Enclosure can overheat, causing power failure and data
loss. Such use will invalidate the warranty.
• Replace a faulty drive with a drive of the same type and of equal or greater capacity.
• All drive bays must be fitted with a drive carrier module or a dummy carrier module in order to
maintain a balanced air flow.
• All the supplied plug-in power supply units, electronics modules, and blank modules must be in place
for the air to flow correctly around the cabinet.
4.6.1 Ops Panel
Important
The Ops Panel is an integral part of the enclosure chassis assembly and is not field replaceable.
Table 4–4
Drive LED Functions
State
Green
Amber
No drive fitted
Off
Off
Drive Power ON
On
Off
Drive Activity
1
On/Blink off
Off
Drive Fault
On
On
Drive Identification
On
FLASHING
