Hot Spare; Figure 1.9 Hot Spares - Fujitsu Eternus DX60 User Manual

Chapter 1 Overview
1.2 Configuration
1.2.4

Hot Spare

Hot spares are used as spare disks for when disks in a RAID group fail, or are in error status.
The following two types of hot spare are available:
• Global Hot spare
This is available for any RAID group.
• Dedicated Hot spare
This is only available to one specified RAID group.
For details about Global Hot spare and Dedicated Hot spare, refer to the "ETERNUS DX60/
DX80/DX90 Web GUI User Guide".
Refer
Make sure to register sufficient hot spares. If a free hot spare is available, when one of the RAID
group disks has a problem, data from this disk is automatically replicated into the hot spare.
User Disk
Figure 1.9
IMPORTANT
Assign "Dedicated Hot spares" to RAID groups that contain important data,
in order to preferentially improve their access to hot spares.
"ETERNUS DX60/DX80/DX90 Web GUI User Guide"
User Disk User Disk
Failure
Hot Spares
Do
CAUTION
• If a disk configured in a RAID1, RAID1+0, RAID5, RAID5+0, or
RAID6 group fails, contact your maintenance engineer immediately
as the failed disk should be replaced at once. If another disk fails
before the first disk that failed is replaced, the data of the second
disk may be lost.
System disks cannot be registered as hot spares.
ETERNUS DX60/DX80/DX90 Disk storage system User Guide
Copyright 2011 FUJITSU LIMITED
Hot Spare
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