Users Guide

The learn cycle recalibrates the battery-integrated circuit so that the controller can determine whether the battery can maintain the

controller cache for the prescribed period in the event of a power loss.

While the learn cycle is in progress, the battery may not be able to maintain the cache during a power loss. If the controller is using Write-

Back Cache policy, then the controller changes to Write-Through Cache policy until the learn cycle completes. The write-through cache

policy writes the data directly to the disk and reduces the risk of data loss in the cache during a power outage.

NOTE: If you have set the controller to Force Write-Back Cache policy, then the cache policy is not changed during the learn

cycle. When using Force Write-Back Cache policy, it is possible for data loss to occur if there is a power outage while the learn

cycle is in progress.

The controller rmware automatically initiates the learn cycle every 90 days. You can, however, delay the start time of the learn cycle for a

further seven days, after which the rmware automatically initiates the learn cycle.

NOTE: The learn cycle cannot be performed while the battery is charging. If either a user or the controller rmware initiates the

learn cycle while the battery is charging, then the battery learn state displays Requested. The learn cycle begins when the

battery is fully charged.