Pool unmounted after reboot

[tonyhr0x]

Hi guys
A couple of days ago, after a reboot I got this message

unmounted pool

When I click on “pool”, Device stats unsupported - try ‘btrfs dev stats /mnt2/NAS08’.

Please help me

[Hooverdan (Dan W.)]

@tonyhr0x, did you try at the command line and check the device statistics (if using the system shell in the Rockstor WebUI, you’ll need to precede it with sudo for this and your root user password):

btrfs dev stats /mnt2/NAS08

Ideally, it gives you an output for each of your devices like this (and hopefully also with zero errors):

[/dev/sdc].write_io_errs    0
[/dev/sdc].read_io_errs     0
[/dev/sdc].flush_io_errs    0
[/dev/sdc].corruption_errs  0
[/dev/sdc].generation_errs  0

Also, when you check out the Disk page, since you’ve run into a problem on that system last time

Failed to mount share due to a low level error

Hi @phillxnet tnx for your time I think I fixed it. In the disk list, where the Smart function was missing, I clicked on RESCAN, and it rebuilt the whole disk index. Now I have everything online again. [image] Thank you very much for the time you dedicated to me, and sorry for the mistakes I made

I assume, this is showing all the disks present?

You can also as @Flox pointed out in another thread, take a look at a couple of specific logs to see whether you’re getting more information on why the mounting operations presumably failed:

Error mounting BTRFS on reinstall after crash

Hi @jopaulsen, and welcome! Sorry you’re having issues… I’m not an expert in this kind of recovery, but before someone knowledgeable will answer, have you tried looking into the dmesg logs? You could try using the dmesg | tail command as suggested in the error message, for instance. Alternatively, you can use Rockstor’s webUI to check this log and others, using the Logs manager found under Services > Logs Manager. [image] There, I suggest to look into dmesg and the rockstor logs as well. Y…