Functions; Rebuild/Copyback; Figure 1.10 Rebuild/Copyback Function - Fujitsu Eternus DX60 User Manual

Chapter 1 Overview

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

Failure
Replaces the failed disk with the new disk.
Copyback
ETERNUS DX60/DX80/DX90 Disk storage system User Guide
Copyright 2011 FUJITSU LIMITED
Rebuild
Creates data from the disks other than
the failed disk and writes the data into
the hot spare.
Hot Spare
After replacing has been completed,
copies the data from the hot spare
to the new disk.
Hot Spare
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