About hot spares in the Storage Provisioning
If a storage array that
has automatic rebuild capability loses virtual disk redundancy, it
uses a physical disk as a hot spare to regain redundancy. If your
storage array does not support an automatic rebuild capability, you
must use vendor tools to manually rebuild the virtual disks. Refer
to your storage vendor documentation for more information.
Use the Storage Array
Configuration Wizard to specify the physical disks that you want to
use as hot spares.
Before you specify a hot spare, refer to the
following best practices:
Specify at least one hot spare for each enclosure.
Although you can specify only one hot spare for all of the
enclosures, consider the risk if more than one physical disk
Specify the physical disks that are in slot 0 in
the enclosures as hot spares. Then, you can quickly identify which
disk is a hot spare.
Specify a hot spare that is at least the same size
as the physical disk that it replaces. If the hot spare is smaller
than the physical disk, the storage array cannot rebuild the
For more recommendations,
refer to your storage array vendor's documentation.