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Dell PowerEdge RAID Controller S140 User’s Guide

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Assigning the global hot spare disks

A global hot spare disk is a backup physical disk that can be used by any redundant virtual disk. It is not assigned (dedicated) to any specific virtual disk. Virtual disks can typically be rebuilt by using a global spare disk, as long as the global hot spare is not already part of the virtual disk and has enough available capacity. Unlike a dedicated hot spare, a global hot spare can be assigned at anytime, even while tasks are running on virtual disks.

NOTE:A hot spare can be created only if a physical disk is in the Ready or Normal state in the Physical Disks field. If the physical disk is in the Online state, the disk is being used by a virtual disk and cannot be selected as a hot spare.
NOTE:If disk space is available in the global hot spare drive then a single global hot spare can be assigned as a hot spare to multiple degraded virtual drives. Therefore, it is possible for the same global hot spare to become part of different degraded virtual drives that have different RAID levels.
Perform the following procedure to assign a global hot spare disk:
  1. Enter the BIOS Configuration utility. See Entering the BIOS configuration utility.
  2. In the Main Menu screen, select the Manage Hot Spare and press <Enter>.
  3. Select Assign Global Hot Spare(s). Press <Enter>.
  4. Use the up or down arrow key to select a physical disk(s) to be used as a global hot spare(s). Press <Insert>.
  5. Press <Enter> to add the global hot spare.
  6. Press the <C> key to confirm the action.

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