Fujitsu Eternus DX80 S2 - Environmental Burden Reduction; Eco-Mode; Figure 5.16 Eco-Mode Mechanism

Chapter 5 Basic Functions
5.4 Environmental Burden Reduction
ETERNUS DX80 S2/DX90 S2 Disk storage system Overview
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5.4 Environmental Burden Reduction
The ETERNUS DX Disk storage system has energy and power savings that reduce CO2 emissions and lessen the
burden on the environment.
5.4.1 Eco-mode
Using Eco-mode allows the rotation of disks that have limited access time to be stopped for specified periods
to reduce power consumption.
Disk spin-up and spin-down schedules can be set for each RAID group, Thin Provisioning Pool (TPP) (*1), or
Flexible Tier Pool (FTRP) (*2). These schedules can also be set to allow backup operations.
*1: A Thin Provisioning Pool is a virtual area that is created when the Thin Provisioning function is used. For details on
the Thin Provisioning function, refer to "6.1.1 Thin Provisioning" (page 77)
.
*2: An FTRP is a layered area that is created when the Flexible Tier function is used. The pool can have up to three layers.
For details on the Flexible Tier function, refer to "6.1.2 Flexible Tier (Automatic Storage Layering)" (page 78)
.
The Eco-mode concept is shown below:
Figure 5.16 Eco-mode mechanism
Online disks
Nearline disks
Online disks
Nearline disks
Online disks
Nearline disks
Disks spinning Disks stoppedDisks stopped
Control linked to usage
Working Phase Working Phase
Disk spin-up Disk spin-down
Backup Phase
Backup
AM
(0:00 to 5:00)
5
PM
(12:00 to 24:00)
12
Off
12
OffOff
12
On
AM
(5:00 to 12:00)