On Fri, 11 Jan 2013, Nicholas Ipsen wrote:

Hello again. I manage to recover most of the data using ddrescue and
various option, but I'm still left with 24576B missing. Of course,
it's probably nothing major in terms of lost files, but I can't help
but worry that it will cause issues when I add the replacement disk to
the array. Do you have any advice regarding this problem?

Force an filesystem check. I don't see any problem with md-raid because of 
these zero:ed 24576 bytes, the only thing that will care is the 
filesystem.

If you want to be 100% sure, run a "check" action on the md raid and make 
sure you have no mismatches on the md layer.

-- 
Mikael Abrahamsson    email: swmike@swm.pp.se