APC Snap Server 2200 Specifications download pdf (Page 46)

RAIDs

32 Snap Server Administrator Guide

automatically uses the hot spare to rebuild itself without administrator

intervention. Snap Servers offer two kinds of hot spares: local and global.

RAID Management Tools

The Snap Server offers several tools for configuring and monitoring RAIDs.

Item Description

Definitions Local hot spare — A local (or dedicated) hot spare is associated with

and is available only to a single RAID. Administrators typically create a

local hot spare for RAIDs containing mission-critical data that must

always be available.

Global hot spare — A hot spare that may be used for any RAID 1 or 5

in the system (assuming sufficient capacity) as necessary.

Identifying Hot spares are identified on the Storage > Devices screen as follows:

Hotspare of md0 (RAID 1)

Global Hotspare for (md0, md1, md2)

where the local hot spare is dedicated to a single RAID (md0), and the

global spare is available to three RAIDs (md0, md1, and md2).

Interaction When a drive in a RAID fails, the system looks for a hot spare in the

following order:

If a local hot spare dedicated to the RAID exists, use the local hot

spare.

If no local hot spare is available, and there is a single hot spare of

sufficient capacity, use the global hot spare.

If no local hot spare is available, and two global hot spares of

different capacity are available, use the smaller hot spare with

sufficient capacity.

Function Navigation Path

Ongoing Maintenance Navigate to the Storage > RAID Set screen, from which you

can create, assess, edit, and delete RAIDs.

E-mail Notification The server can notify you when a RAID is degraded. This

allows you to take action to ensure workflows are not

disrupted (Settings tab).

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APC Snap Server 2200 Specifications Page 46