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Chapter 5 Configuration Menu
> 5.2 RAID Management
ETERNUS DX400/DX8000 series ETERNUSmgr User Guide Settings/Maintenance
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Copyright 2010 FUJITSU LIMITED
P2X0-0760-02ENZ0
4 Click the [OK] button.
→ Returns to the [Menu] screen.
End of procedure
5.2.16 Create Hot Spare
This function creates hot spare disks without stopping ETERNUS DX400/DX8000 series opera-
tions. A hot spare disk acts as a backup disk in case of disk drive failure.
The created hot spare disks are shared by each RAID Group. If a disk failure occurs, rebuild
starts automatically. After a failed disk drive is replaced, the data is copied back to the new disk
drive. The hot spare disk which was used as a backup of the failed disk drive returns to a spare
disk.
• A system disk can NOT be created as a hot spare disk.
• The capacity of a hot spare disk must be equal to or larger than the
failed disk drive in order to take over. Make sure to create a hot spare
disk of the same capacity as or larger than the data disk.
• Create a hot spare disk which is the same type (Fibre Channel disk
drive, Nearline SATA disk drive, or SSD) as the data disks and has the
largest capacity of the data disks.
The disk drive in the last slot (Disk#OE) of each Drive Enclosure (DE)
should be assigned as a hot spare disk. When multiple hot spare disks are
assigned, it is recommended that they be in reverse order from the last slot
(i.e. Disk#OE, then Disk#OD, Disk#OC, ...).