FUJITSU Disk Storage System DX60 - Manual (Page 77)

ETERNUS DX60 S2 Disk storage system User’s Guide -Operation-
77
Copyright 2012 FUJITSU LIMITED P3AM-5512-03ENZ0
Chapter 6 Maintenance
This chapter describes maintenance for the ETERNUS DX Disk storage system.
6.1 Periodic Backup
In case of a system failure, important data should be regularly backed up.
6.2 Volume Formatting Time
Table 6.1 shows the time for volume formatting (when the volume capacity is 100GB).
Table 6.1 Time for volume formatting (disk)
*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 disk.
CAUTION
Do
• We recommend that you backup important data regularly. If the
ETERNUS DX Disk storage system fails and the data has not been
backed up, it may be lost.
RAID level No. of disks Volume formatting time (*1)
2.5" SAS disks 3.5" SAS disks Nearline SAS disks
RAID1 2 Approx. 40 minutes/
100GB Approx. 35 minutes/
100GB Approx. 73 minutes/
100GB
RAID1+0 8 Approx. 30 minutes/
100GB Approx. 25 minutes/
100GB Approx. 43 minutes/
100GB
RAID5 5 Approx. 25 minutes/
100GB Approx. 25 minutes/
100GB Approx. 49 minutes/
100GB
RAID5+0 6 Approx. 30 minutes/
100GB Approx. 25 minutes/
100GB Approx. 43 minutes/
100GB
RAID6 6 Approx. 40 minutes/
100GB Approx. 30 minutes/
100GB Approx. 58 minutes/
100GB