Hot Spare Disks; Disk Drives - Fujitsu Eternus2000 Manual

1.2.4

Hot Spare Disks

Hot spare disks are used as the spare disk drives when the disk drives in the RAID group have failed, or are
in error status.
Make sure to register the hot spare disk. If the hot spare disk has been registered, when one of the disk
drives in the RAID group has a problem, data from this drive is automatically repaired into the hot spare
disk.
User Disk
Figure 1.9
CAUTION
IMPORTANT
1.2.5

Disk Drives

Two kinds of disk drive can be installed in the device: SAS disk drives and Nearline SAS disk drives. Each
disk drive are suitable for the following usages.
• SAS Disk Drive
SAS disk drives are highly-performance/high-reliability disk drives for enterprise use. SAS disk
drives support 24/7/365 operations and are used to store frequently accessed data such as high per-
formance databases.
• Nearline SAS Disk Drive
Nearline SAS disk drives are high capacity / cost effective disk drives for data backup and archive
use. Nearline SAS disk drives can store information that requires a lower access rate at a still rea-
sonable speed more cost effectively than the SAS disk drives.
P3AM-2512-03EN ETERNUS2000 disk storage system User Guide
User Disk User Disk
Failure
Hot Spare Disks
Do
• If a disk drive configured in a RAID1, RAID1+0, RAID5, or RAID6 group
fails, contact your maintenance engineer immediately as the failed disk
drive should be replaced at once. If another disk drive fails before the
first disk drive that failed is replaced, the data of the second disk drive
may be lost.
• Disk drives in Slot#0 – Slot#3 of controller enclosure (system disks)
cannot be registered as a hot spare disk.
System disks cannot be registered as hot spare disks.
Copyright 2009 FUJITSU LIMITED
Hot Spare Disk
Chapter 1 Overview
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