User`s guide

112 Chapter 5 Configuring the XStack Storage
Figure 5-47. Battery Policy Dialog Box
3. Select the appropriate setting that the XStack Storage unit should use if the battery fails. The
choices are:
– Ignore the status of the battery and do nothing. Use this setting if you will be operating
the XStack Storage from AC power with an uninterruptible power supply.
– Stop buffering I/O in cache, and directly write data to disk. Use this setting if you want
to write to disk all I/O buffered in cache memory in the event of a battery failure.
If the XStack Storage unit is operating from an uninterruptible power supply
(UPS) and the UPS fails, there may not be sufficient time to write all the
buffered I/O to disk. This can result In lost or unintelligible data.
– Prevent any reads from or writes to volumes. This setting prevents all read and write
operations from occurring if the battery fails.
4. Click OK.