[Discuss] Help with I/O errors on RAID array?

[dsr at randomstring.org (Dan Ritter)]

Rich Pieri wrote: 
> On Mon, 13 Oct 2025 00:08:30 +0000 "dbarrett at blazemonger.com" wrote:
> 
> > Hi folks. A few files on my
> > Ubuntu RAID-1 partition (two M.2 SSDs) are producing input/output
> > errors when read, like this:
> > 
> > $ cat myfile
> > cat: myfile: Input/output error
> 
> Sounds like one of the drives is failing.

Yeah, that's likely

syslog showing errors?

I would shut it down, unplug one of them, see if the errors are
more consistent with the remaining one. If they are, boom,
replace it.

If you get no errors, replace the other one.

If they both produce errors...

1. Got backups?

2. Replace them with two drives from different manufacturers.

3. now is an excellent time to consider ZFS

-dsr-