Fujitsu ETERNUS DX S5 Series Design Manual page 95

2. Basic Functions
Environmental Burden Reduction
AdvancedCopy Manager 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. ETERNUS SF Storage Cruiser or ETERNUS
SF AdvancedCopy Manager cannot be used to set the Eco-mode for TPPs and FTRPs.
• Specify the same Eco-mode schedule for the RAID groups that configure a WSV. If different Eco-mode
schedules are specified, activation of stopped disks when host access is performed occurs and the
response time may increase.
• Eco-mode schedules are executed according to the date and time that are set in the ETERNUS DX. To
turn the disk motor on and off according to the specified schedule, set the Network Time Protocol (NTP)
server in the date and time setting in ETERNUS Web GUI to automatically adjust the date and time.
• If the number of disks that are activated in a single drive enclosure is increased, the time for disk
activation may take longer (about 1 to 5 minutes). This is because all of the disks cannot be activated at
the same time.
• Even if the disk motor is stopped and spun up repeatedly according to the Eco-mode schedule, the
failure rate is not affected compared to when the motor is always on.
• Even if Eco-mode is enabled, the disk motor may not stop or the disk may not turn off in an
environment where the server OS or software regularly accesses the ETERNUS DX.
Note
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
Stop
(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
Scheduled operation
Operation
The motor starts rotating
10 minutes before the scheduled operation
95
21:00
Stop
The disk stops 10 minutes
after the scheduled operation
0:00
Design Guide