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7.3. 2 TB Limitation
In order to be compatible with different Operating Systems and the files systems
that each one supports, the largest RAID Volume you can create on Network
Storage is 2 TB.
7.4. Spare Drive
A spare is a disk drive that has been designated to replace a failed disk drive in a
RAID Volume. In the event of the failure of a disk drive within a RAID 1 or three-
drive RAID 5 Volume, the spare drive is activated as a member of the RAID Volume
to replace a disk drive that has failed.
A spare drive cannot replace the failed drive in a RAID 0 Volume because of the
way in which data is written to the disk drives under RAID 0.
A spare drive is not available for a RAID 10 Volume because RAID 10 requires all
four disk drives in the Network Storage enclosure. However, when you replace the
failed disk drive, the Network Storage will automatically rebuild the RAID Volume
using the new disk drive.
You must designate a disk drive as a Spare. By default, and unassigned disk drive
is Free. Use ASM to designate the Free disk drive as a Spare. See
Maintaining a spare drive is a good precaution to protect your RAID Volume integrity
in the event of disk drive failure.
7.5. Automatic Rebuilding
When a disk drive in your RAID 1, 5, or 10 Volume fails, and a replacement disk
drive becomes available, the RAID Volume will rebuild itself to the new disk drive
automatically.
For RAID 1 and three-drive RAID 5 Volumes, you can designate a spare drive. If a
spare drive is present when the RAID Volume experiences a disk drive failure, the
rebuild will start automatically using the spare drive.
For RAID 1, RAID 5, and RAID 10 Volumes without a spare drive, the RAID Volume
will begin to rebuild itself automatically when you remove the failed disk drive and
install a new disk drive.
A RAID 0 Volume cannot be rebuilt because of the way in which data is written to
the disk drives under RAID 0. Even if there is a designated spare drive, rebuilding is
not possible for RAID 0 Volumes.
