IBM TotalStorage DS4400, Руководство пользователя

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Storage Server might have defective components or connections. Check the
storage-management software for indications of other component failures.
Replacing a failed battery
When instructed by the storage-management software, replace the battery.
Attention: Because the battery CRU is a sealed unit, you must replace the entire
CRU (not just the batteries) in order to keep the battery backup system in working
order. Opening the battery CRU voids your warranty.
1. Use the storage-management software to disable caching. Caching is disabled
when the Fast write cache indicator light is off. Data in cache is unprotected if
a power outage occurs while the battery CRU is out of operation.
Attention: When you handle static-sensitive devices, take precautions to
avoid damage from static electricity. For details about handling static-sensitive
devices, see “Handling static-sensitive devices” on page 41.
Chapter 3. Replacing DS4400 Storage Server components
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