dscheck(#ar/2): negative b_blkno error on FreeBSD-4.10-STABLE - SOLVED

[Vladimir Zhurov]

Thank you for suggestions.

Finally, I have solved the problem.

It was in fact hardware failure. One of the drives in array failed 
(despite the "no error found" verdict of WD DLG utility). I discovered 
it by deleting array and initializing drives individually.

But it raises another question. Obviously fsck was right reporting 
errors, atacontrol and WD DLG were wrong reporting that everything was 
fine (I am not sure that atacontrol is designed to detect such errors 
anyway), but how would one figure out which drive failed in such a case 
without actually going into complete re-formating of array?

Vlad.