Rorke Data Galaxy HDX2 GHDX2-2430S-24F4D - Manual (Page 105)

Galaxy GHDX2-2430S/R-24F4D Installation and Hardware Reference Manual
5-10 Subsystem Maintenance
NOTE:
1. The chance of BBU charger failure is comparatively low. If the cause
of a failure cannot be determined even after a BBU module is
replaced, contact your system vendor for a replacement controller and
return the controller module through the standard RMA procedure.
Details of the RMA procedure can be found on the Galaxy website.
2. It is recommended to include BBU failure as one of the Event
Triggered reaction item in firmware configuration utility. If so
configured, data caching will be temporarily disabled during the time
when a BBU fails.
5.4. Replacing a Failed PSU Module
5.4.1 Notes on PSU Module Maintenance
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Redundant (N+1) PSU modules: The subsystem comes with three fully
redundant, hot-swappable PSU modules. These modules are accessed
through the rear of the subsystem.
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Immediate replacement: When a PSU fails, it should ideally be replaced
immediately. Do not remove a PSU module unless a replacement is readily
available. Removing a PSU without a replacement will cause severe
disruptions to the internal airflow and the subsystem will overheat, possibly
causing irreparable damage to some of the subsystem components.
WARNING!
Although the PSU modules are fully redundant, it is not advisable to run
the subsystem with any failed PSU module for a long period of time. If a
second PSU module fails, the subsystem will enter an idle state to protect
the stored data.
5.4.2 Replacing a PSU Module
To replace a PSU, please follow these steps:
Step 1. Flip open the cable clamp (if used) and disconnect the
power cord that connects the failed module to the main power.