Table 42 Eco-Mode Specifications - Fujitsu ETERNUS DX S5 Series Design Manual

2. Basic Functions
Environmental Burden Reduction
For RAID groups with the following conditions, the Eco-mode schedule can be set but the disks motor cannot be
stopped or the power supply cannot be turned off:
SDPVs are registered
•
• ODX Buffer volumes are registered
If disk access occurs while the disk motor is stopped, the disk is immediately spun up and can be accessed within
one to five minutes.
The Eco-mode function can be used with the following methods:
• Schedule control
Controls the disk motors by configuring the Eco-mode schedule on ETERNUS Web GUI or ETERNUS CLI. The
operation time schedule settings/management is performed for each RAID group and TPP.
• External application control (software interaction control)
Disk motor is controlled for each RAID group on ETERNUS SF Software.
The disk motors are controlled by interacting with applications installed on the server side and responding to
instructions from the applications. Applications which can be interacted with are as follows:
- 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 products, an Eco-mode disk operating schedule does not need to
be set. A drive in a stopped condition starts running when it is accessed.
• IBM Tivoli Storage Manager for Space Management
• IBM Tivoli Storage Manager HSM for Windows
Symantec Veritas Storage Foundation Dynamic Storage Tiering (DST) function
•
The following table shows the specifications of Eco-mode.
Table 42 Eco-mode Specifications
Item
Number of registrable schedules
Host I/O monitoring interval (*1)
Disk motor spin-down limit count (per
day)
Target drive
*1: The monitoring time period to check if there is no access to a disk for a given length of time and stop the drive.
*2: Self Encrypting Drives (SEDs) are also included.
Caution
• To set Eco-mode schedules, use ETERNUS Web GUI, ETERNUS CLI, ETERNUS SF Storage Cruiser, or
ETERNUS SF AdvancedCopy Manager. Note that schedules that are created by ETERNUS Web GUI or
ETERNUS CLI and schedules that are created by ETERNUS SF Storage Cruiser or ETERNUS SF
Description
64
30 minutes (default)
25 (default)
SAS disks (*2)
Nearline SAS disks
94
Remarks
Up to 8 events (during disk operation) can be set for each
schedule.
Monitoring time can be set from 10 to 60 minutes.
This setting can only be changed by users with the
Maintenance Operation policy.
The number of times the disk is stopped can be set from 1 to
25.
When it exceeds the upper limit, Eco-mode becomes
unavailable, and the disks keep running.
This setting can only be changed by users with the
Maintenance Operation policy.
SSD is not supported.
Design Guide