Fujitsu ETERNUS DX S5 Series - 3. Process Time (Estimated); Volume Formatting Time; Rebuild;Copyback Process Time

3. Process Time (Estimated)
This chapter explains the estimated time that is required for volume formatting and for rebuild/copyback for
each RAID level configuration.
Volume Formatting Time
The following table shows the time required for the volume formatting process.
Table 5 Volume Formatting Time
RAID level Number of drives
Volume formatting time (*1)
SAS disks Nearline SAS disks SSDs
RAID1 2 (1D+1M) Approx. 40 minutes/
100GB
Approx. 73 minutes/100GB Approx. 7
minutes/100GB
RAID1+0 8 (4D+4M) Approx. 30 minutes/
100GB
Approx. 43 minutes/100GB Approx. 3
minutes/100GB
RAID5 5 (4D+1P) Approx. 25 minutes/
100GB
Approx. 49 minutes/100GB Approx. 3
minutes/100GB
RAID5+0
6 ((2D+1P) ´
2)
Approx. 30 minutes/
100GB
Approx. 43 minutes/100GB Approx. 4
minutes/100GB
RAID6 6 (4D+2P) Approx. 40 minutes/
100GB
Approx. 58 minutes/100GB Approx. 4
minutes/100GB
*1: The value shows the time required for volume formatting 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.
Rebuild/Copyback Process Time
This section explains the time required for Rebuild/Copyback.
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Rebuild Process Time
The following table shows the time required for the rebuild process.
Table 6 Rebuild Process Time
RAID level Number of drives
Rebuild process time (*1)
SAS disks Nearline SAS disks SSDs
RAID1 2 (1D+1M) Approx. 27 minutes/
100GB
Approx. 47 minutes/100GB Approx. 5
minutes/100GB
RAID1+0 8 (4D+4M) Approx. 7 minutes/
100GB
Approx. 11 minutes/100GB Approx. 2
minutes/100GB
RAID5 5 (4D+1P) Approx. 10 minutes/
100GB
Approx. 15 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. 21 minutes/100GB Approx. 2
minutes/100GB
*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 drive.
28 Operation Guide (Basic)