Disc errors, how do I know if a disc is bad?

Hi all,

I am having problems with my NV+ v2, I cannot write large files to it, and by large I mean >1Gig. When I try doing this the action times out. While looking into this a little more I have noticed that when I power cycle the unit and it performs a volume scan errors are found and supposedly correct. In the email that the unit sent me has the following read out:

fsck from util-linux-ng 2.17.2
e2fsck 1.41.14 (22-Dec-2010)
/dev/mapper/c-c: recovering journal
Pass 1: Checking inodes, blocks, and sizes
Inode 28125427, i_blocks is 599952, should be 599960. Fix? yes
.....
Inode 45056006, i_size is 589810297856, should be 605472948224. Fix? yes
Pass 2: Checking directory structure
Pass 3: Checking directory connectivity
Pass 4: Checking reference counts
Pass 5: Checking group summary information
/dev/mapper/c-c: ***** FILE SYSTEM WAS MODIFIED *****

I am not a IT expert but I do know that this is not good and is more than likely the root cause of my copying issue. My question to the experts on this forum is how do I fix this? How do I run a volume scan without power cycling the whole unit? If there is only one drive that the errors are on I would easily replace the drive but how do I know what one? I have look at the Smart Status and every device is showing 0 errors.

I am running a NV+2 with RAIDiator 5.3.7 and 4x WD harddrives (Red).

Have anyone else had this issue? What did you do to over come this?

Thanks,
AbbottWins