Fujitsu Eternus DX80 S2 User Manual page 43

Chapter 3 Setup
3.3 Eco-mode
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• Eco-mode schedules are executed according to the date and time that are set in the ETERUS
DX Disk storage system. To turn on and turn off the disk motors according to the schedule
that is set, use the Network Time Protocol (NTP) server in the date and time setting in
ETERNUS Web GUI or ETERNUS CLI to set automatic adjustment of the date and time.
ETERNUS DX80 S2/DX90 S2 Disk storage system User's Guide -Operation-
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 minute. When a
set time elapses since the last access to a disk, the motor of the disk is stopped. The time
to stop the motor of the disk is the time that is set in the "Host I/O Monitoring Interval" of
the Eco-mode general setting function of ETERNUS Web GUI or ETERNUS CLI. The
default setting is 30 minutes.
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. The
number of disk activations from a stopped state can be set in the "Disk Motor Spin-down
Limit Count" of the Eco-mode general setting of ETERNUS Web GUI or ETERNUS CLI.
The default setting is 25 times.
(Example 1) Setting the Eco-mode schedule via ETERNUS Web GUI
Operation schedule is set as 9:00 to 21:00 and there are no accesses outside of the
scheduled period
9:00
1:00
Stopped
Disk motors are spun up
ten minutes before the start of
the scheduled operation
(Example 2) Setting the Eco-mode schedule via ETERNUS Web GUI
Operation schedule is set as 9:00 to 21:00 and there are accesses outside of the
scheduled period
9:00
1:00
Disk motors are spun up
ten minutes before the start of
the scheduled operation
*1: The time that is set in the motor-off interval setting of
the "Host I/O Monitoring Interval" of the Eco-mode general setting function
Copyright 2011 FUJITSU LIMITED
21:00
Scheduled Operation
Disk Motors Running
21:00
Scheduled Operation
Disk Motors Running
Disk motors are
stopped ten minutes
after the end of
the scheduled operation
43
Stopped
Disk motors are stopped
ten minutes after the end of
the scheduled operation
Access
Access finishes
Stopped Operation
Disk Motors Running
Access OK in
one minute
Disk motors are
stopped 30 minutes (*1)
after the access finishes
P3AM-4842-01ENZ0
0:00
Stopped