Eco-Mode - Fujitsu ETERNUS DX80 S2 User Manual

Chapter 3 Setup

3.6 Eco-mode

3.6 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.
The scheduled operation times can be set for each RAID group, Thin Provisioning Pool (TPP), or Flexible Tier
Pool (FTRP) and for operations such as backing up.
If an access occurs while a motor is stopped, the disk is immediately spun up and access proceeds normally
after approximately one to five 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 operating 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 "ETERNUS CLI User's Guide".
• To set Eco-mode schedule, use ETERNUS Web GUI, ETERNUS CLI, ETERNUS SF Storage Cruiser, or ETERNUS SF
AdvancedCopy Manager (hereinafter, referred to as Storage Foundation Software ETERNUS SF). Note that
schedules that are created by ETERNUS Web GUI or ETERNUS CLI and schedules that are created by Storage
Foundation Software ETERNUS SF cannot be shared. Make sure to use only one type of software to manage
a RAID group.
• Use ETERNUS Web GUI or ETERNUS CLI to set Eco-mode for TPPs and FTRPs. Storage Foundation Software
ETERNUS SF cannot set Eco-mode for TPPs and FTRPs.
• Eco-mode cannot be used for the following drives:
- Global Hot Spares (Eco-mode can be used for Dedicated Hot Spares)
- SSDs
- Unused drives (that are not used by RAID groups)
• For RAID groups, TPPs, or FTRPs disk motors in the following conditions, the Eco-mode schedule cannot be
specified:
- No volumes are registered
- Configured by SSDs
- The RAID group is a RAID group to which the volume with Storage Migration path belongs
- The RAID group is a RAID group that is registered as an REC disk buffer
• For RAID groups in the following conditions, the Eco-mode schedule can be set but the drive motors cannot
be stopped:
- SDPVs are registered
- ODX Buffer volumes are registered
ETERNUS DX80 S2/DX90 S2 Disk storage system User's Guide -Operation-
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