RAID Xanadu User Manual page 12

CAUTION
Cautions concerning batteries
The batteries of the disk array unit have a life span.
If batteries are used past their life span, the backup time cannot be guaranteed and
user data may be destroyed on a power outage.
When replacing batteries due to their life span, a request for battery purchase and
maintenance must be made.
Ask your sales or maintenance service agent for details.
Make use of backup using the battery of the disk array unit no more than 4 times per
year.
If this is done more than four times in a year, the battery life cannot be guaranteed.
Backups: Power-offs without a power-off sequence. Power outages, for example.
Performance may deteriorate while charging the battery of the disk array unit.
Reason: Fast writing in which a cache is used is not done unless the battery is fully
charged, since backup time on a power outage cannot be guaranteed.
Do not use the disk array unit at temperatures higher than what is documented in the
"Disk Array Unit Setup Guide."
The battery life cannot be guaranteed if you use it beyond that temperature.
When disposing of batteries of the disk array unit, do so in accordance with local
government regulations.
For details, contact your local government. The unit is equipped with batteries as
follows.
Each controller: Lithium battery (button battery)
Each controller: Nickel metal hydride battery
Each extended BBU: Nickel metal hydride battery
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