Raw Read Error Rate = 2 in WDRED08 deffinitely points, that disk replacement is neccessary (especialy in mission-critical environments). I would start from this point to solve the issue - replace this disk. It is big probability that the consistency error is caused by this.
Other disks are fine. Do what I mentioned above.
Thanks, I got 9 out of 10 working in RAID5, and 1 as hot spare, so I'll replace the WDRED08 to the hotspare and do a consistency check again.
Also, I'm curious: the 'puncturing bad block' message is 4 times and referring to 4 different disks according to the error message: 0-3:2:2, 0-3:2:4, 0-3:2:0, 0-3:2:1
Do I know which disks are these?
The SMARTs were good except for my 08 disk, where there is 2 raw read error. 2 is 2, not 4 as it is stated in the error messages. All the others were clean according to the SMARTs :-\
Thanks again, I'll write my result of the consistency check after replacement! 