Dealing with hardware faults
Ensure that you have obtained a replacement module of the same type before removing any faulty
module as described in the Chapter 7, “Module removal and installation,” on page 55 section.
Important: If the enclosure system is powered up and you remove any module, replace it immediately. If
the system is used with any modules missing for more than a few seconds, the enclosure(s) can overheat,
causing power failure and potential data loss. Such action can invalidate the product warranty.
Important: Observe applicable/conventional ESD precautions when handling modules and components,
as described in the “ESD precautions” on page 55 section. Avoid contact with mid-plane components,
module connectors, leads, pins, and exposed circuitry.
Continuous operation during replacement
ClevOS supports hot swapping of data disk drives. Enclosure access and use during this period is
uninterrupted. If an enclosure is equipped with redundant PSUs, sufficient power is provided to the
system while the faulty module is replaced.
Note: Accesser
®
ApplicationsIBM COS Medium / Large Disk Enclosure support hot-plug replacement of
redundant expansion modules, power supplies, fan modules, and HS expanders. Hot-add replacement of
expansion enclosures is also supported.
Firmware
After installing the hardware and powering on the storage system components for the first time, verify
that the controller modules, expansion modules, and disk drives are using the current firmware release.
Contact IBM support for additional information.
CRUs for IBM COS Medium / Large Disk Enclosure
A listing of Customer Replaceable Units for the Medium and Large Disk Enclosures.
Table 23. IBM COS Medium/Large Disk Enclosure product components for 4U 106-drive chassis
Item
Enclosure CRU and related
component description
Access
1
Disk drive module: 3.5" DDIC
(Disk in drive carrier)
Top
2
Chassis (sheet metal enclosure)
with integrated PCBAs (included
with chassis; not available
separately)
Note 2
3
Power supply unit (PSU) module
available as AC unit (chassis uses
two PSUs of same model type)
Rear
4
Expansion module (IOM) for
storage expansion Disk Enclosure
Medium IOM and Disk Enclosure
Large IOM are not
interchangeable.
Rear
5
System fan module
Rear
6
Controller fan module
Top
7
HS Expander module (PCBA card) Top
Chapter 6. Troubleshooting and problem solving 53
Summary of Contents for Medium J11
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