Adaptec 5325301638 - Snap Server 4500 NAS, Руководство администратора

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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:
1 If a local hot spare dedicated to the RAID exists, use the local hot
spare.
2 If no local hot spare is available, and there is a single hot spare of
sufficient capacity, use the global hot spare.
3 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).