From dmesg:
[ 1524.519065] ata3.00: status: { DRDY }
[ 1524.519070] ata3.00: failed command: WRITE FPDMA QUEUED
[ 1524.519073] ata3.00: cmd 61/20:e0:20:fc:55/00:00:03:00:00/40 tag 28 ncq dma
16384 out
res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x4
(timeout)
[
Thank you for taking the time to report this bug and helping to make
Ubuntu better. Reviewing your dmesg attachment in this bug report it
seems that there is a problem with your hardware. I recommend
performing a back up and then investigating the situation. Measures you
might take include
