In the last few days I get lots of error messages about /dev/sda. Today this drive will be replaced by a new one. The software RAID has to be rebuild then. So this will cause some downtime. I can’t say anything specific yet.

The discs have been successfully checked and everything is up again. RAID1 is running again, too. Have fun, feel safe! ;D - at least for now ;D.

I’m currently resyncing the degraded raid arrays. After this i need to restart the server into the rescue system and do a fsck on the device mounted on /. After this our RAID works again - hopefully.