Specifications

Recovering from Hard Drive Failure
85MSA1000 Reference Guide
Replacing a Drive
Replacement drives must have a capacity no less than that of the smallest drive in
the array. Drives of insufficient capacity will be failed immediately by the
controller before Automatic Data Recovery can begin.
Caution: Sometimes, a drive that has previously been failed by the controller
may seem to be operational after the system is power-cycled, or (for a
hot-pluggable drive) after the drive has been removed and reinserted.
However, continued use of such marginal drives may eventually result in data
loss. Replace the marginal drive as soon as possible.
A hot-pluggable drive can be removed and replaced at any time, whether the host
or storage system power is on or off. System performance and fault tolerance will
both be affected until the rebuild operation is completed. This can take several
hours, even if the system is not busy while the rebuild is in progress.
When a hot-pluggable drive is inserted, all disk activity on the array is paused
while the new drive is spinning up (usually 10 seconds or so). If the drive is
inserted while power is on, in a fault-tolerant configuration, data recovery onto the
replacement drive will begin automatically (indicated by the blinking online
LED).
Disk drive replacement should be performed as soon as possible. In addition, all
logical volumes on the same array as the drive being replaced should have a
current valid backup.