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Copyback Process Time
The following table shows the time required for the copyback process.
Table 7 Copyback Process Time
RAID level Number of drives
Copyback process time (*1)
SAS disks Nearline SAS disks SSDs
RAID1 2 (1D+1M) Approx. 27 minutes/
100GB
Approx. 49 minutes/100GB Approx. 5
minutes/100GB
RAID1+0 8 (4D+4M) Approx. 7 minutes/
100GB
Approx. 11 minutes/100GB Approx. 1
minute/100GB
RAID5 5 (4D+1P) Approx. 10 minutes/
100GB
Approx. 16 minutes/100GB Approx. 2
minutes/100GB
RAID5+0
6 ((2D+1P) ´
2)
Approx. 7 minutes/
100GB
Approx. 11 minutes/100GB Approx. 2
minutes/100GB
RAID6 6 (4D+2P) Approx. 13 minutes/
100GB
Approx. 20 minutes/100GB Approx. 2
minutes/100GB
*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 drive.
IMPORTANT
[Set RAID Group Parameter] specifies the rebuild priority for host access. When the Rebuild Priority is
"High", rebuild, copyback, and redundant copy performance can be improved.
Note that RAID group performance (throughput) may be reduced when a rebuild, copyback, or redundant
copy is being performed in the target RAID group.
3. Process Time (Estimated)
Rebuild/Copyback Process Time
29 Operation Guide (Basic)
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