I do not know RAID, so those issues Darko or someone that knows RAID will have to help with.
Normally this says e2fsck is needed, not sure if the same with RAID or not.
The partitions outside disk for sr0 are not an issue. I think it just has to do with the oversize CDs.
Boot sector type: -
Boot sector info:
Mounting failed: mount: unknown filesystem type ''
But line 656 looks like md3. And it does not show details to confirm. Devices sda, sdb Partition table itself looks ok.
But you also then seem to have errors in RAID partition table. Which may relate to drives being slightly different in size - see total sectors and then last partition is different:
I thought with RAID they had to be the same, or sda4 needs to be a bit smaller to accommodate the slightly smaller sdb4 because sdb is a few sectors smaller than sda. Or if RAID is using the entire partition it does not match??
/dev/sda4 93,747,200 1,250,263,039 1,156,515,840 fd Linux raid autodetect
/dev/sdb4 93,747,200 1,250,260,991 1,156,513,792 fd Linux raid autodetect