HDD Active for 5 seconds , then STANDBY ..... always spinning down 5 seconds later after last use

  • Im fighting with my 1tb Hitachi USB 3.0 connected Harddrive to OMV4.0. Im doing a lot of spin up and spin down everytime I access the unit.



    My Setup:
    - RPI 3b+
    - USB3 to Sata
    - Hitachi 1tb Harddrive
    - Latest OMV 4 Stable Version.
    - All updates and upgrades installed.


    I tryed: (I reboot after every change)

    • APM : 1 | AAM: Disabled | Spindown = 5 minutes
      Result: Drive active while using it, then STANDBY 5 seconds later after last use.
    • APM : 64 | AAM: Disabled | Spindown = 5 minutes
      Result: Drive active while using it, then STANDBY 5 seconds later after last use.
    • APM : 127 | AAM: Disabled | Spindown = 5 minutes
      Result: Drive active while using it, then STANDBY 5 seconds later after last use.

    LOG:


    While using disk:
    root@NasPI:~# hdparm -C /dev/sda
    /dev/sda:
    drive state is: active/idle


    After 5 seconds:
    root@NasPI:~# hdparm -C /dev/sda
    /dev/sda:
    drive state is: active/idle



    Far away from 127 , I have not tested. 128 or more = No spindown at all


    What should I do? Im destroying the disk with infinite spin-up / down cycles........


    I only find the opposite version into the forum (people with harddrive not spinning down)....


    Thanks all!!!

  • SOLVED!!!!


    It´s the APM state!!!


    APM = DISABLED | AAM: DISABLED | Spindown = 5 minutes
    WORKS (active 5minutes and then, spins down)


    APM STATES (1 to 127) spin down all my harddrives after 5 seconds (WdBlue 500gb and Hitachi 1TB)
    APM STATES (128 to XXX) not support Spindown at all.


    Hope this could help someone!

  • As you're finding, on this topic, there are opinions on both sides of the fence. Here are a few things to consider.


    When a drive spins up, that's when current inrush is highest and the stresses on it (wear and tear) are the greatest. This applies to any electric motor, of any size. Depending on the number of daily accesses, spinning your drives down on such a short interval (5 minutes) may actually result in greater power consumption than just letting it spin. If you're spinning the drive down to save power, note that your platform is already doing a pretty good job.


    Given my usage, with automated functions running after-hours and client backups, 128 makes the most sense to me.

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