(In reply to Markus Zimmermann from comment #4) > Interesting enough, the problem occurred last Sunday->Mondeay but not the > Sunday->Monday before. > > This could also be triggered by some mdadm cronjob which would run in the > same timeframe... right? Hi Markus, Do you use multipath ? (I see some multipath related symbols show up). I see there are md raid1 errors, but it seems from underlying I/O errors. So let me confirm them firstly. Thanks. Coly Li