[TriLUG] Bit rot detection without ZFS/btrfs?

[Randy Barlow]

On Mon, 01 Jul 2013 15:40:20 -0400, Steve Holton <sph0lt0n at gmail.com>  
wrote:
> But what happens if there's bit-rot on the destination machine....

In the tentative plans for what I intend to do, there will be at least  
three copies of all my files. One on the source, one on the backup system,  
and one on the offsite backup system.

If all three places checksum the files, then if any one of them reports a  
mismatch, you can use the other two to determine whether it was the  
checksum that rotted (since the checksum itself could be wrong), or the  
file. Then corrective action can be taken.

-- 
R