Hot-Spare Disk; Free" Disk - NEC Promise SuperTrak EX8350 User Manual

Disk array controller (sata2)
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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
Global Spare
Dedicated Spare
To assign a hot-spare disk, WebPAM, the management utility of the card,
must be installed.
Check
For standby rebuild, or rebuild using hot-spare disks, see "Chapter 3 -
Disk Array Controller Features ".
Tips

"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.
The disk which has previously been configured as logical drive can be
subject to media patrol even if it is in "free" status.
Check
Feature
Available as a hot-spare disk if a HDD in any logical drive is defected.
Available as a hot-spare disk only if a HDD in the specified logical disk is defected.
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