
Chapter 1 Overview
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1.3 Functions
ETERNUS DX60/DX80/DX90 Disk storage system User Guide
37
Copyright 2010 FUJITSU LIMITED
P3AM-3042-07ENZ0
Table 1.7
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.
Table 1.8
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