User guide

Chapter 1 Overview
> 1.3 Functions
ETERNUS DX60/DX80/DX90 Disk storage system User Guide
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Copyright 2010 FUJITSU LIMITED
P3AM-3042-06ENZ0
1.3.8 Eco-mode
Using Eco-mode allows the spindle rotation of the disk to be stopped for specified periods to
reduce power consumption. Disk spin-up and spin-down schedules can be set for each RAID
group, and can also be set to allow backup operations.
The following shows the Eco-mode mechanism.
Figure 1.19 Eco-mode mechanism
The following shows an Eco-mode backup scheduling example.
Figure 1.20 Setting example for Eco-mode schedule
Online disks
Nearline disks
Online disks
Nearline disks
Online disks
Nearline disks
Disks spinning Disks stoppedDisks stopped
Control linked to usage
Backup
Working Phase Working Phase
Disk spin-up Disk spin-down
Backup Phase
ETERNUS
DX60/DX80/DX90
Data Volume
Twenty-four 300GB SAS disks
RAID1+0
Backup Volume
Twenty-four 750GB Nearline SAS disks
RAID5
PM
(12:00 to 24:00)
AM
(0:00 to 12:00)
12
5
OffOff
12
On
Activate the whole
system between
0:00 to 5:00
Backup