ZFS server has gone crazy slow

[Chris Ross]

> On Apr 11, 2020, at 14:10, Ireneusz Pluta/wp.pl <ipluta at wp.pl> wrote:
> W dniu 2020-04-11 o 20:02, Chris Ross pisze:
>> And, I’m not sure how to check SMART values.  This is a Dell server, and I’m 95% sure I have it’s RAID controller (Dell PERC 6, mfi0) just set to provide JBOD for the two disks.  Will the smartmontools package be useful with disks on an mfi controller?
> Does the controller expose these jbods as /dev/da? devices to the system ?

mfid devices.  And, googling showed that I might want to use mfip to allow me to access the drives for smartctl, and I’ll work on that more in a bit..

But, Eugene was kind enough to point out something that should’ve been obvious, that I’d filled my ZFS volumes.  I had a snapshot of everything from a while ago, and one of the filesystems contains large data files.  Deleting the snapshot on that volume freed things back to functional.

Thanks all.

      - Chris