Chapter 6 Maintenance
6.3 Rebuild/Copyback Process Time
ETERNUS DX60 S2 Disk storage system User’s Guide -Operation-
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Copyright 2012 FUJITSU LIMITED P3AM-5512-03ENZ0
6.3 Rebuild/Copyback Process Time

This section explains the time required for Rebuild/Copyback.

Rebuild process time

Table 6.2 shows the time required for the rebuild process (when the volume capacity is 100GB).

Table 6.2 Rebuild process time (disk)

*1: The time required to rebuild a 100GB volume of the indicated RAID level, number and type of disks
when there is no concurrent server I/O. The time that is required depends on the type and
configuration of the disk.
Copyback process time

Table 6.3 shows the time required for the copyback process (when the volume capacity is

100GB).

Table 6.3 Copyback process time (disk)

*1: The time required to copyback a 100GB volume of the indicated RAID level, number and type of disks
when there is no concurrent server I/O. The time that is required depends on the type and
configuration of the disk.
RAID level No. of disks Rebuild process time (*1)
2.5" SAS disks 3.5" SAS disks Nearline SAS disks
RAID1 2 Approx. 27 minutes/
100GB
Approx. 20 minutes/
100GB
Approx. 47 minutes/
100GB
RAID1+0 8 Approx. 7 minutes/
100GB
Approx. 5 minutes/
100GB
Approx. 11 minutes/
100GB
RAID5 5 Approx. 10 minutes/
100GB
Approx. 10 minutes/
100GB
Approx. 15 minutes/
100GB
RAID5+0 6 Approx. 7 minutes/
100GB
Approx. 7 minutes/
100GB
Approx. 11 minutes/
100GB
RAID6 6 Approx. 13 minutes/
100GB
Approx. 13 minutes/
100GB
Approx. 21 minutes/
100GB
RAID level No. of disks Copyback process time (*1)
2.5" SAS disks 3.5" SAS disks Nearline SAS disks
RAID1 2 Approx. 27 minutes/
100GB
Approx. 20 minutes/
100GB
Approx. 49 minutes/
100GB
RAID1+0 8 Approx. 7 minutes/
100GB
Approx. 5 minutes/
100GB
Approx. 11 minutes/
100GB
RAID5 5 Approx. 10 minutes/
100GB
Approx. 7 minutes/
100GB
Approx. 16 minutes/
100GB
RAID5+0 6 Approx. 7 minutes/
100GB
Approx. 5 minutes/
100GB
Approx. 11 minutes/
100GB
RAID6 6 Approx. 13 minutes/
100GB
Approx. 13 minutes/
100GB
Approx. 20 minutes/
100GB