User guide

Compaq StorageWorks RAID Array 4000 User Guide
Hot-pluggability refers to the ability to remove and replace components
without powering down the system. There are four components in the Compaq
RA4000 that are considered hot-pluggable:
Hard Drives—Failed hot-pluggable drives in fault-tolerant configurations
RAID 1, 4, and 5 can be replaced without interrupting system operation. The
data on the failed drive will be restored automatically on the replacement drive
online.
Fan Assembly—If one of the cooling fans in the assembly should fail (the fan
LED is amber), the Fan Assembly can be removed and replaced. The fan
assembly must be replaced within five minutes to ensure system operation
continues without interruption.
Power supply—Only in systems with the optional redundant power supply
installed, either power supply may be removed and replaced without
interrupting system operation.
RA4000 Controller—If the failed RA4000 Controller cache is replaced with
the same size cache on the existing RA4000 Controller, the controller can be
removed, the cache replaced, and the controller reinstalled without interrupting
system operation. Changing the cache size requires that you power down the
system.
See Chapter 4, “Troubleshooting,” for specific limitations when replacing
hot-pluggable components.