Filesystem corruption

[Volker Wysk]

Am Mittwoch, den 31.07.2019, 05:10 -0700 schrieb Bekkenes:
> Most computer systems have built in utilities for running diagnostics
> on
> boot.
> You said they checked everything, but you mentioned PSU and mobo
> specifically.
> Most issues with corrupt filesystems are either due to unexpected
> power loss
> and older filesystems, but since you here on a Ubuntu mailing list
> this
> shouldn't really be an issue.
> 
> Have you run diagnostics on your harddrives?

Yes, the SMART diagnostics have been checked, with help from this list.
They haven't revealed any problems. 

The machine seems to run fine again, although it's unknown what the
reason of that "data corruption" was. The BIOS has been updated, the
SATA cables replaced, a new CMOS battery, a new OS installed (Ubuntu
18.04 LTS), no more SSD-as-a-cache...

You say "built in utilities for running diagnostics on boot" - do you
mean some tool built into the BIOS? I haven't encountered something
like that.

There is memtest86+, to be started from the GRUB boot menu. I've tried
that, but no errors have been found.

Bye,
Volker