Dnia 2010-01-28, czw o godzinie 09:58 -0500, Carlos Williams pisze:

Now my /dev/md0 RAID5 array is mounted to my / partition. I still need
to expand the file system to make use of the extra space, right? I
simply added the drive and empty partition table into the RAID...I
still don't have a file system on it yet, do I? 

Yes, that's what resize2fs will do for You (as long as it's ext[2-4]
we're talking about).

You need to 'fsck -f' first to verify that the filesystem is fine.

-- 
Cheers
Michał (Saviq) Sawicz