Chapter 1 Overview
1.3 Functions
ETERNUS DX60/DX80/DX90 Disk storage system User Guide
37
Copyright 2011 FUJITSU LIMITED
P3AM-3042-08ENZ0
shows the times (for 100GB volumes) required for the rebuild process to complete for
various disk configurations.
Table 1.7
Rebuild process times (for SAS disks and Nearline SAS disks)
*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.
shows the times (for 100GB volumes) required for the copyback process to complete
for various disk configurations.
Table 1.8
Copyback process times (for SAS disks and Nearline SAS disks)
*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.
RAID level
No. of
disks
Rebuild process time
(*1)
3.5" SAS disks
2.5" SAS disks
Nearline SAS disks
RAID1
2
Approx. 20 minutes/100GB
Approx. 27 minutes/100GB
Approx. 47 minutes/100GB
RAID1+0
8
Approx. 5 minutes/100GB
Approx. 7 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)
3.5" SAS disks
2.5" SAS disks
Nearline SAS disks
RAID1
2
Approx. 20 minutes/100GB
Approx. 27 minutes/100GB
Approx. 49 minutes/100GB
RAID1+0
8
Approx. 5 minutes/100GB
Approx. 7 minutes/100GB
Approx. 11 minutes/100GB
RAID5
5
Approx. 7
minutes/100GB
Approx. 10
minutes/100GB
Approx. 16
minutes/100GB
RAID5+0
6
Approx. 5
minutes/100GB
Approx. 7
minutes/100GB
Approx. 11
minutes/100GB
RAID6
6
Approx. 13 minutes/100GB
Approx. 13 minutes/100GB
Approx. 20 minutes/100GB