e2fsck on a large volume taking days to run

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http://forums.fedoraforum.org – I have a 6x2TB software RAID array configured as RAID6 (two redundant drives, 8GB of usable space) running in Fedora 17. After the power issues in the NE last week, the system booted up to some problems with the array and maybe some other issues since it forced into maintenance mode. I ran some checks on mdadm and found that i may have lost one drive, but i still had 5 online and the array was usable. I also found that the problem with mounting the array was in the filesystem on top of the array, not the array itself. I tried running e2fsck right away but it couldn't detect the superbloc (HowTos)