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Chapter 6: Maintenance
175
Replace Cache Battery
The cache battery is located in the Cooling Unit 1 (the left one). The battery
assembly is replaced as an individual part. No tools are required for this
procedure.
To replace a cache battery:
1. Press the release button and pull the handle downward as shown above.
2. Pull the cooling unit out of the VTrak enclosure.
Cautions
• Try reconditioning the battery before you replace it. See
page 84 or page 137 for more information.
• The battery assembly is replaced as a unit. Do not attempt to
disconnect the battery by itself.
• Installing an incorrect replacement battery may result in an
explosion.
• Dispose of used batteries according to the instructions that
accompany the battery.
• While the battery is removed, your system will be vulnerable
to a power failure. Temporarily set your cache policy to write-
through before starting this procedure. See “Logical Drive
Settings” on page 107 (WebPAM PROe) or “Logical Drive
Settings and Functions” on page 148 (CLU).
• If power service has failed, do not remove the cooling unit if
the Controller’s Dirty Cache LED is flashing. See “Unsaved
Data in the Controller Cache” on page 236.