• 6.12.4 - data loss and unraid crash while moving data on zfs drive within same dataset/folder

    Minion

    By Minion

      • Closed

    I 1st observed this while moving some data around on one of my disks.
    - 4 disk array (1x parity, 3x data).

    image.thumb.png.218d22619bbfd7d2e009d243c8a408bb.png
    I observe this behaviour on the drive with zfs file system.

    Running the following command I moved multiple copies of a Windows10.iso file one folder up.

    image.png.b060f1099aebdf57488682a7fc9d9969.png

    I can see that RAM is filling up:

    image.png.4f23c86dd80092f72df6e7761b70cf4b.png

    Unraid GUI only shows read activity on the disk3 and NO writes.


    Unitl I get this:
    image.png.255a43992abca59fea4c11dc0ac89b57.png

    The moved files are lost!
    3 out of 5 files were moved and nothing can be found in the target folder.
    image.png.58841236ee3d6e588d4ab7097f909e05.png

    image.png.27ce0ea11ce236aaa31f68a44022cb75.png
    And Unraid UI is crashing due to lack of free RAM.

    Any ideas?
    I know that zfs is using RAM to buffer file transfer, but this does not make any sense.

    I lost an unknown number of files due to this issue...
    Luckily, I just moved between servers and the old one still holds a copy ....

    Go to reports Stable Releases

    User Feedback

    Recommended Comments

    itimpi

    The command that was used moved the files to / which is the root of the file system and which is in RAM.    That would fill up the RAM and eventually crash the server, and on reboot the files would be gone.

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