Excessive disk write activity

    • OMV 2.x

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    • Excessive disk write activity

      I've been running OMV (now on 2.1.11) for a while with no problems. I put in a new data drive (WD Red 3TB) last week and i'm noticing some strange disk write activity.

      First I noticed that the disk activity light was constantly flashing (about twice per second) on the new drive, it's off on the old data drive.

      Investigating, I ran sudo iotop -o and noticed that the total disk write is ~2000K/s even when there are no processes listed making any disk writes. I've run the same command on 3 other computers runnung Arch Linux and can't replicate that behaviour, they all show 0 total disk write when there are no processes listed.

      I'm not aware of any way isolating iotop to a single drive but iostat can.
      Running iostat /dev/sda -d 2 I get that 4-6MB is written every 2 seconds to the drive in question. In comparison, the old data drive was always 0 writes and the os drive wrote 20-60K every 5-6 seconds which i guess is the logging.

      I can't understand why there would be 2MB written to the drive every second yet no processes are listed in iotop.

      Could it be a faulty drive or something wrong with the setup? Any ideas?

      I'm worried that the excessive writing might affect performance or even shorten the life of the HDD.

      Here is my /etc/fstab if that is any use, the drive in question is UUID: 83e1b9ac-...

      Source Code

      1. # /etc/fstab: static file system information.
      2. #
      3. # Use 'blkid' to print the universally unique identifier for a
      4. # device; this may be used with UUID= as a more robust way to name devices
      5. # that works even if disks are added and removed. See fstab(5).
      6. #
      7. # <file system> <mount point> <type> <options> <dump> <pass>
      8. # / was on /dev/sda1 during installation
      9. UUID=8400ac34-11be-4fdc-924c-7b1f92eae8ef / ext4 errors=remount-ro 0 1
      10. # swap was on /dev/sda5 during installation
      11. UUID=ec9860bd-9b81-442c-a185-b5c029ad4930 none swap sw 0 0
      12. /dev/sdb1 /media/usb0 auto rw,user,noauto 0 0
      13. tmpfs /tmp tmpfs defaults 0 0
      14. # >>> [openmediavault]
      15. UUID=f844f9ca-82fb-4c8e-af5b-78cafe4c0a2a /media/f844f9ca-82fb-4c8e-af5b-78cafe4c0a2a ext4 defaults,noatime,nofail,acl,user_xattr,noexec,usrjquota=aquota.user,grpjquota=aquota.group,jqfmt=vfsv0 0 2
      16. UUID=83e1b9ac-f47d-48a9-a63a-c1a1ddedd9fd /media/83e1b9ac-f47d-48a9-a63a-c1a1ddedd9fd ext4 defaults,noatime,nofail,user_xattr,noexec,usrjquota=aquota.user,grpjquota=aquota.group,jqfmt=vfsv0,acl 0 2
      17. # <<< [openmediavault]
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