Eco-Mode - Fujitsu ETERNUS DX60 S2 User Manual

Chapter 3 Setup

3.2 Eco-mode

3.2 Eco-mode
Eco-mode is a function that is specifically designed to reduce the power consumption that is
characteristic of Massive Arrays of Idle Disks (MAID). Eco-mode saves power by managing the
scheduled operation times of specified disks and stopping the motors of disks during periods
when they are not required.
Disk spin-up and spin-down schedules can be set for each RAID group, and can also be set to
allow backup operations.
If an access occurs while a motor is stopped, the disk is immediately spun up and access pro-
ceeds normally after approximately one to three minutes.
The disk motors can be turned on and off as required by linking the following Storage Foundation
Software ETERNUS SF to Eco-mode.
• ETERNUS SF Storage Cruiser
• ETERNUS SF AdvancedCopy Manager
The following hierarchical storage management software can be also linked with Eco-mode.
When using the Eco-mode function with these software, an Eco-mode disk operation schedule
does not need to be set, since these software turns on the disk motors when stopped disks are
accessed.
• IBM Tivoli Storage Manager for Space Management
• IBM Tivoli Storage Manager HSM for Windows
• Dynamic Storage Tiering (DST) function in Symantec Veritas Storage Foundation
The restrictions and notes on using Eco-mode are described below.
For details on the Eco-mode procedure, refer to "ETERNUS Web GUI User's Guide" or "ETER-
NUS CLI User's Guide".
• To set Eco-mode, use ETERNUS Web GUI, ETERNUS SF Storage Cruiser, or ETERNUS SF
AdvancedCopy Manager (hereinafter, referred to as Storage Foundation Software ETERNUS
SF).
• Eco-mode cannot be used for the following disks:
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-
• Disk motors in the following RAID groups are not stopped by the Eco-mode schedule:
-
-
-
• The operation time of disks varies depending on the Eco-mode schedule and the disk access.
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FUJITSU Storage ETERNUS DX60 S2 Disk storage system User's Guide -Operation-
System disks
Hot spares
RAID groups that contain a system disk
RAID groups in which no volumes are registered
RAID groups in which SDPVs are registered
Access to a stopped disk outside of the scheduled operation time period causes the motor
of the stopped disk to be spun up, allowing normal access in about one to three minutes.
When a set time elapses since the last access to a disk, the motor of the disk is stopped.
If a disk is activated from the stopped state more than a set amount of times in a day, the
Eco-mode schedule is not applied and disk motors are not stopped by the Eco-mode.
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