User`s guide

4-1

Managing Spares

In This Chapter

DuraStor RAID controllers automatically reconstruct redundant

(fault-tolerant) arrays (RAID 3, RAID 4, RAID 5, RAID 50, and

mirrored) if an array becomes critical and a proper-size spare disk

drive is available. An array becomes critical when one member

disk drive fails.

You can set up two types of spare disk drives:

■ Dedicated—Available disk drive that is assigned to a specific

array (see page 4-2).

■ Pool—Available disk drive that is assigned to the spare pool,

which can provide a spare for any failed disk drive in any

redundant array. In active-active mode, pool spares are available

to both controllers. If a disk drive in an array on either controller

fails, the controller can use a pool spare to reconstruct the array

(see page 4-5).

You can also enable the Dynamic Spares function. (See page 4-3.)

Managing Dedicated Spares 4-2

Enabling Dynamic Spares 4-3

Managing the Spare Pool 4-5