Functions; Rebuild/Copyback; Figure 1.10 Rebuild/Copyback Function - 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/DX90 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-3042-06ENZ0 ETERNUS DX60/DX80/DX90 Disk storage system User Guide
Rebuild
Hot Spare
Failure
Replaces the failed disk with the new disk.
Copyback
After replacing has been completed,
copies the data from the hot spare
to the new disk.
Hot Spare
36
Creates data from the disks other than
the failed disk and writes the data into
the hot spare.
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