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007-4428-003
3: Replacing Modules
Pre-installation Safety Precautions
Observe the following safety precautions.
Warning:
Hazardous voltage and current levels are present inside the storage
subsystem. The replacement of rear-bay modules should be performed only by
technically qualified personnel.
Caution:
Do not remove a module unless a replacement can be immediately added. The
system must not be run without all modules in place.
Caution:
Follow electrostatic discharge (ESD) precautions while replacing the plug-in
modules. Avoid contact with the backplane components and module connectors.
Dealing with Hardware Faults
Ensure that you have obtained a replacement module of the same type before removing
any faulty module.
Caution:
If the SGI TP900 subsystem is powered on and you remove any module,
replace it immediately. If the subsystem is used without its modules or blanking plates
for more than a few minutes, the enclosure can overheat, causing power failure and data
loss. Such use will invalidate the warranty.
Continuous Operation during Replacement
If the enclosure contains two power supply modules, one of them can maintain power to
the subsystem while the other is replaced. A cooling module can be replaced without
SCSI data flow interruption. I/O modules can be replaced with the system powered up,
but the SCSI Channel will be down and data flow will be interrupted.
Summary of Contents for TP900
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