Global Spares - Overland Storage SnapServer Administrator's Manual

SnapServer 7.0 Administrator's Guide

Global Spares

Click the Global Spares button to view the Global Spares page showing all the disks
available for use, or that are in use, as global spares. To enable a disk as a global spare,
check the checkbox next to the desired disk and click OK. More than one disk can be checked
at a time. To disable or delete a disk assigned as a global spare, clear the checkbox next to
the disk and click OK.
A spare is a disk drive that can automatically replace a damaged drive in a RAID 1, 5, 6, or
10. Designating a disk drive as a spare helps ensure that data is available at all times. If
one disk drive in a RAID fails or is not operating properly, the RAID automatically uses the
spare to rebuild itself without administrator intervention. SnapServers offer two kinds of
spares: local and global.
Item
Definitions
10400317-001 10/2011
Description
Local (hot) spare – A local (or dedicated) spare is associated with and
is available only to a single RAID. Administrators typically create a local
spare for RAIDs containing mission-critical data that must always be
available.
Global (hot) spare – A spare that may be used for any RAID 1, 5, 6, or
10 in the system (assuming sufficient capacity) as necessary.
©2010-11 Overland Storage, Inc.
5 – Traditional RAID Storage
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