admins worst nightmare...

[adler-wRvlPVLobi1/31tCrMuHxg at public.gmane.org (Stephen Adler)]

Guys,

I discovered that my 6 terabyte file does not seem to be working 
properly... I did a copy of a gigabyte sized file to find that the 
original and copied md5sum's to differ.... uggg.... I'm doing a 
filesystem check right now, but I'm wondering if you guys have any 
thoughts on what may be going on with the file system. It's an ext3 file 
system mapped over a software raid 5 raid array. When I created the file 
system, I used all the default mkfs parameters for a journaled file 
system. (i.e. mkfs -J /dev/md127; where md127 is my raid device.)

When I checked a small file, several megabytes in size, the copy and 
original had the same md5sum.

Is there a tool which will give you a summary of how different binary 
files are? will diff work on a gigabyte sized file?

Cheers. Steve.