This product allows you to use Eco-mode. While checking the RAID group in use from the server, the spindle rotation of disk drive can be turned ON/OFF on a per RAID group basis and the power of the disk drive can be controlled.
There are "Eco-mode for Device" and "Eco-mode for RAID Group" in Eco-mode. "Eco-mode for Device" can be set to ON/OFF and "Eco-mode for RAID Group" can be set ON/ON(power off)/ OFF respectively.
When Eco-mode for Device is set to ON, Eco-mode for RAID Group can be ON/OFF controlled.
When Eco-mode for RAID group is set to ON and Schedule to External, the spindle rotation of disk drives making up the RAID group can be ON/OFF controlled. Also, when Eco-mode for RAID group is set to ON(power off) and Schedule to External, the power of disk drives making up the RAID group can be ON/OFF controlled. However, Eco-mode operation cannot be done toward the RAID groups listed in "Uncontrollable RAID Groups" of "6.1.6.1 Concerns in Storage System Operation When Using Eco-mode".
For the Eco-mode operation, the target device is selected with Web Console and the operation is executed.
The executable operations are as follows:
Setting the device's Eco-mode to ON
Setting the device's Eco-mode to OFF
Setting the RAID Group's Eco-mode to ON
Setting the RAID Group's Eco-mode to ON(power off)
Setting the RAID Group's Eco-mode to OFF
Starting up the disk drive for which the RAID Group is configured
Stopping the disk drive for which the RAID Group is configured
Note
When the RAID group corresponds to either following conditions, the disk drive cannot be stopped from Web Console. Stop the disk drive by the storageadm spindle stop command:
The volume whose volume type is WSV exists in the target RAID group.
The volumes in the target RAID group are concatenated with other RAID groups by the LUN Concatenation.
There are following concerns when using Eco-mode in storage system operation.
Uncontrollable RAID Groups
The Eco-mode is not available for the following RAID groups.
A RAID group for which the system disk is included
A RAID group for which it is set in the NAS area
A RAID group for which the mainframe volumes, MVV volumes or MVV Concatenation volumes are registered
A RAID group for which no volumes are registered
A RAID group that includes an SSD
A RAID group used by Thin Provisioning function
A RAID group used by Flexible Tier
A RAID group belonging to a REC disk buffer
Temporary RAID group created while executing the Logical Device Expansion
Stopping Disk Drives
The ETERNUS Disk storage system stops a disk drive after confirming that its disk drive is not accessed within a certain period of time (30 minutes). Therefore, time more than its period is needed until the disk drive stops actually even if the "stop request" in this software is executed.
The ETERNUS Disk storage system does not stop a disk drive while the configuration of the RAID group or volume is changed and the Advanced Copy to access to its disk drive is done. Therefore, the disk drives may not be stopped even if the "stop request" in this software is executed. The disk drives stop when the procedure is completed in the ETERNUS Disk storage system.
Starting Disk Drives
When it is accessed to the stopped disk drive, the ETERNUS Disk storage system starts its disk drive rotation. However, a few minutes (about three minutes) is needed until the disk drive becomes the accessible status.
Continuous Disk Drive Rotation
When the number of the starting disk drive rotation exceeds the number of certain times (three times), the ETERNUS Disk storage system judges that its disk drive is used with high frequency and does not stop its disk drive rotation. Therefore, even if the "stop request" in this software is executed, after the disk drive status changes from "Idle" to "Active" and there is no access to its disk drive, its disk drive status may not change to "Idle".
The number of the starting disk drive rotation per one day is cleared to zero when time of ETERNUS Disk storage system becomes 00:00.
