System lock up and reboot when writing to RAID 6 array

  • Hello,


    I would like to find out why the system locks up at random times when I write to a 10 drive RAID 6 array. (Basically shell freezes on screen and system reboots in ~30 sec)


    After creating the RAID array (mdadm), while resyncing the system locked up and rebooted in about every hour. When the resync process finished it was working fine until I started to copy stuff to it (using rsync but it doesn't matter). I set the bwlimit to 4000K about 10 hours before, no issues since.
    If I don't set the limit it takes anywhere from 5 minutes to few hours to lock up and reboot.


    Things I've done/tried so far:

    • created a 2GB test file, copied over, no problem (~330MB/s)
    • turned off the write-cache on all drives (not solved the issue)
    • kernel update (.14 -> .15)
    • can't find anything useful in the logs (except some ACPI errors)
    • memtest

    The system:

    • Mobo: ASUS B85M-G (6 onboard sata connector)
    • 2x PCIE: Delock 70137 SATA RAID (2 sata connector / card)
    • PSU: 650W FSP Raider 2


    The ACPI warnings:


    What else should I check or do?

    • Offizieller Beitrag

    Try a different power supply? Maybe the voltage is dropping too much at higher bandwidth?


    Try different sata cards? Maybe the driver is having issues at higher bandwidth?

    omv 7.0.4-2 sandworm | 64 bit | 6.5 proxmox kernel

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  • Thanks for the reply!


    I don't think that the PSU or the cards can't handle the operation. If I start copying a big file over 300MB/s it works, no instant lock ups or anything.
    But I'll try with a different PSU just in case.

    • Offizieller Beitrag

    the cards can't handle the operation

    Maybe the cards are overheating? Does the main cpu on the card have a heatsink? Is the case ventilated well? What do your cpu temps look like?

    omv 7.0.4-2 sandworm | 64 bit | 6.5 proxmox kernel

    plugins :: omvextrasorg 7.0 | kvm 7.0.10 | compose 7.1.2 | k8s 7.0-6 | cputemp 7.0 | mergerfs 7.0.3


    omv-extras.org plugins source code and issue tracker - github


    Please try ctrl-shift-R and read this before posting a question.

    Please put your OMV system details in your signature.
    Please don't PM for support... Too many PMs!

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