Chapter 6 Maintenance
6.3 Rebuild/Copyback Process Time
ETERNUS DX80 S2/DX90 S2 Disk storage system User’s Guide -Operation-
Copyright 2013 FUJITSU LIMITED P3AM-4842-12ENZ0
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6.3 Rebuild/Copyback Process Time
This section explains the time required for Rebuild/Copyback.
â– 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 value shows the rebuild process time when the volume capacity is 100GB and there is no server I/O. The time
that is required depends on the type and configuration of the disk.
â– 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 value shows the copyback process time when the volume capacity is 100GB and there is no server I/O. The time
that is required depends on the type and configuration of the disk.
RAID level Number 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 Number 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
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