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1-6. Hot-Spare Disk
The hot-spare disk is prepared as an auxiliary HDD substituting for a defected HDD included in a logical
drive which is configured at a redundant RAID level. Detecting a HDD fault, the system disconnects the HDD
(or makes it offline) and starts rebuild using the hot-spare disk. The hot-spare disk can be set in two types as
listed in the table below.
Setting Feature
Global Spare
Available as a hot-spare disk if a HDD in any logical drive is defected.
Dedicated Spare
Available as a hot-spare disk only if a HDD in the specified logical disk is defected.
Check
To assign a hot-spare disk, WebPAM, the management utility of the card,
must be installed.
Tips
For standby rebuild, or rebuild using hot-spare disks, see "Chapter 3 -
Disk Array Controller Features ".
"Free" disk
A "free" disk (non-configured disk not assigned to a logical drive and hot-spare disk) can substitute for
defected HDD in the similar way as a global spare. In the configuration including both hot-spare and "free"
disks, the hot-spare disks are used preferentially.
However, "free" disks cannot be subject to media patrol. Thus it is recommended to define "free" disks as
hot-spare disks.
Check
The disk which has previously been configured as logical drive can be
subject to media patrol even if it is in "free" status.