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Solved
ReadyNAS Pro 4 Kernel Panic
Hi guys,
I've got a ReadyNAS Pro 4 that seems to be kernel panicking on occasion (usually every few days). The LCD will display "_raw_spin_lock_bh+16" when this occurs and I have to perform a h...
Hi guys,
Sorry it's a few months down the track now but I thought I better do the right thing and come back in case anyone else experiences this. It looks like with the combination of heavy I/O from the maintenance tasks coupled with heavy I/O on the backup LUN stored on it (there are regular backups every 3 hours) was starving the RAID volume of IOPS and effectively crashing the OS because it couldn't write to it's disks quickly enough. The balance appears to have just been the symptom of that problem.
Unfortunately I can't say anything for certain, but I SSH'd into the NAS and watched it under load and the CPU was really struggling and the load averages were really high. I've adjusted my backup schedules to try and avoid heavy writes during the hours the NAS could potentially be doing maintenance and it hasn't crashed since.
Okay so the balance worked fine this time, and a scheduled one has since completed as well. I'll keep an eye on this over the next little while and make sure no more crashes occur.
Hi guys,
Sorry it's a few months down the track now but I thought I better do the right thing and come back in case anyone else experiences this. It looks like with the combination of heavy I/O from the maintenance tasks coupled with heavy I/O on the backup LUN stored on it (there are regular backups every 3 hours) was starving the RAID volume of IOPS and effectively crashing the OS because it couldn't write to it's disks quickly enough. The balance appears to have just been the symptom of that problem.
Unfortunately I can't say anything for certain, but I SSH'd into the NAS and watched it under load and the CPU was really struggling and the load averages were really high. I've adjusted my backup schedules to try and avoid heavy writes during the hours the NAS could potentially be doing maintenance and it hasn't crashed since.
Ok then, dojobel , thanks for letting know. You might want to accept your last post as solution, though. Careful planning always helps a lot.
Kind regards
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