• [6.9.1] R/W counters don't increment despite disk activity

    CS01-HS

    By CS01-HS

      • Closed Minor

    My guess is this is related to the spindown fix in 6.9.1.

     

    I'm rsync-ing from the 3rd partition (Data) of a disk mounted through UD. You can see reads at 14.7MB/s:

    357704955_ScreenShot2021-03-18at12_35_01PM.thumb.png.1cea0d6029dd443dc91149d2faadfd1c.png

     

    If I switch the view to counters though it shows 0 reads:

    161878193_ScreenShot2021-03-18at12_34_45PM.thumb.png.0dec32f0eab835ea770dbe390713690c.png

     

    I suspected the R/W rate looks at disk-level stats but the counters look at partition-level stats and only the 1st partition (so my sync from partition 3 doesn't register.)

     

    I confirmed this by running an rsync from the 1st partition: 

    rsync --dry-run -avc --progress /mnt/disks/APconfig /tmp/

     

    And as expected the counters increment and the disk is reported active:

    1217217382_ScreenShot2021-03-18at12_51_15PM.thumb.png.9f87a18b93bb0f5bc07a8b56ac691673.png

     

    I think the fix is to track the sum of disk stats over all partitions but I can imagine why you didn't.

    nas-diagnostics-20210318-1256.zip

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    CS01-HS

    Is there a risk of data corruption if unraid spins down the disk while another partition is being written to? That'd be my only concern.

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    limetech
    1 hour ago, CS01-HS said:

    Is there a risk of data corruption if unraid spins down the disk while another partition is being written to? That'd be my only concern.

    Shouldn't be.  What will happen is disk will spin right back up.  Use of multiple partitions is not supported at this time.

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