Chapter 1 Overview
1.3 Functions
ETERNUS DX60/DX80/DX90 Disk storage system User Guide
48
Copyright 2011 FUJITSU LIMITED
P3AM-3042-08ENZ0
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 stopped
Disks 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
Off
Off
12
On
Activate the whole
system between
0:00 to 5:00
Backup