Hi,
I had backup job errors since two days (ERROR: job failed with err -125 - Operation canceled).
Looking with dmesg I can see this:
[413188.587199] ata1.00: exception Emask 0x0 SAct 0x1000 SErr 0x0 action 0x0
[413188.587213] ata1.00: irq_stat 0x40000008
[413188.587217] ata1.00: failed...