Fujitsu ETERNUS DX80 S2 User Manual page 52

Chapter 3 Setup
3.6 Eco-mode
• Specify the same Eco-mode schedule for the RAID groups that configure a WSV. If different Eco-mode
schedules are specified, activation of stopped drives when host access is performed occurs and the
response time may increase.
• The operation time of disks varies depending on the Eco-mode schedule and the disk access.
- 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 five 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.
(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
1:00
(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
1:00
• 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.
• Up to eight 2.5" drives or four 3.5" drives can be activated at the same time in a single drive enclosure.
When these maximums are exceeded, the first eight 2.5" drives or four 3.5" drives are activated, followed
by the rest of the drives in matching increments for each size. If the number of drives that are activated in
a single drive enclosure is increased, the time for drive activation takes longer, causing the response times
for the server to increase, which may result in access paths being lost. To prevent this from occurring, the
RAID configuration and drive installation must be taken into consideration.
ETERNUS DX80 S2/DX90 S2 Disk storage system User's Guide -Operation-
9:00
Stopped Scheduled Operation
Disk Motors Running
Disk motors are spun up
ten minutes before the start of
the scheduled operation
9:00
Scheduled Operation
Disk Motors Running
Disk motors are spun up
ten minutes before the start of
the scheduled operation
52
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21:00
Stopped
Disk motors are stopped
ten minutes after the end of
the scheduled operation
Access
21:00 Access finishes
Stopped Operation
Disk Motors Running
Access OK in
one to five minutes
Disk motors are
stopped ten minutes
after the end of
the scheduled operation
0:00
Stopped
P3AM-4842-12ENZ0