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Chapter 10 Component Management
10.2 Functions in the Action Area for Component
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3
10.2.6
Assign Dedicated Hot Spare
This function registers a drive as a Dedicated Hot Spare for a RAID group.
A Dedicated Hot Spare is a spare drive (hot spare) for a specified RAID group that is used when
a drive failure occurs.
If a disk fails, data copy (rebuild) to a Dedicated Hot Spare starts automatically.
When a failed drive is replaced, the data is copied back from the Dedicated Hot Spare that is
substituting for the failed drive, and the Dedicated Hot Spare then returns to a spare drive.
Click the [OK] button.
→ Deletion of the Global Hot Spare starts.
Click the [Done] button to return to the [Disks] screen.
•
Make sure to register a Dedicated Hot Spare with the same or a larger
capacity than the data drives. If the Dedicated Hot Spare capacity is
smaller than the data drive, the drive does not work as the hot spare.
•
When a mix of SAS disks, Nearline SAS disks, and SSDs are installed
together in the ETERNUS DX Disk storage system, Dedicated Hot
Spare of each type is required. Register the Dedicated Hot Spare with
the same capacity as the maximum capacity drive for each type.
•
Only one RAID group can be registered for each Dedicated Hot Spare.
A Dedicated Hot Spare cannot be registered to multiple RAID groups.
•
Drives that are currently used cannot be registered as Dedicated Hot
Spares.
When the failed drive and the Dedicated Hot Spare are switched, a
Dedicated Hot Spare with the same capacity as the failed drive is used on a
priority basis. If there is no Dedicated Hot Spare with the same capacity, a
Dedicated Hot Spare with a larger capacity than the failed drive is used.
ETERNUS Web GUI User's Guide
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End of procedure
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