NEC N8103-89 User Manual
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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.
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. The disk of the type can accept media patrol.
defected. The disk of the type can accept media patrol.
Dedicated Spare
Available as a hot-spare disk only if a HDD in the specified logical
disk is defected. The disk of the type can accept media patrol.
disk is defected. The disk of the type can accept media patrol.
Check
To define a hot-spare disk, WebPAM, the management utility of the card,
must be installed.
must be installed.
Tips
For standby rebuild, or rebuild using hot-spare disks, see "Chapter 3
Features of Disk Array Controller."
Features of Disk Array Controller."
"Free" disk
A "free" disk (unconfigured 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.
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.
"free" disks as hot-spare disks.