I am setting up my second OMV server.
This time I am trying to set a spin-down time for all the data disks.
My configuration is:
- No RAID
- One SSD drive for the operating system + 5 individual SATA drives.
- Drives are 3x8TB WD RED (5400 rpm) + 1x2.0TB Seagate + 1x1.5TB Seagate
- SMART is enabled on all the disks with the following parameters: Power Mode = STANDBY and Check Interval = 1800
- No scheduled jobs
So, for every disk, I have set in Storage -> Physical Disks -> Physical disk Properties:
APM = 1 - Minimum power usage with standby (spindown)
AAM = Disabled
Spindown time = 60 minutes
But the disks never spin down. They always stay on.
I tried hddparm -C /dev/sdX and can confirm that the disks are ACTIVE/IDLE
I even tried to manually spin down the disks but after few seconds they have turned on (an exception has been logged in the system log).
I don't know if it related, but using iotop, I also noticed that every 10 seconds there are 2 tasks that come up:
- rrdcached -l unix:/var/run/rrdcached.sock -j ~/ -B -w 900 -f 3600 -p /var/run/rrdcached.pid
Also in the system log there are some CRON jobs running. I haven't set any myself. Probably they are system CRON jobs.