Functions; Rebuild/Copyback - Fujitsu Eternus DX60 User Manual

Chapter 1 Overview
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1.3 Functions

1.3 Functions
This section describes the main ETERNUS DX60/DX80 functions.
1.3.1

Rebuild/Copyback

When a disk fails and the RAID group redundancy has been broken, Rebuild/Copyback restores
the disk status back to normal status as a background process.
RAID5 (No Redundancy)
RAID5 (Redundant)
RAID5 (Redundant)
RAID5 (Redundant)
Figure 1.10 Rebuild/Copyback function
P3AM-3042-03ENZ0 ETERNUS DX60/DX80 Disk storage system User Guide
Rebuild
Hot Spare
Failure
Replaces the failed disk with the new disk.
Copyback
After replacing completed,
copies the data from the hot spare
to new disk.
Hot Spare
33
Creates data from the other disk than
failed disk and writes the data into
the hot spare.
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