[cdhostage]

Is there a way to either:
1) while my Mac is copying something from my internal HD to a FW HD, make it read the new file on the FW and compare it to make sure it's exactly the same?
or
2) after it's been copied, run a comparision check which will tell me what's different and needs to be recopied?

Some of you may remember my MP3 degradation thread. Let's just assume I'm a fanatic about consistency and not talk about the merits of the digital encoding.

I imagine that this is already done in the background, but please, reassure me.

[Maneki Neko]

You could compare afterwords with a diff. In the terminal type diff -r dir1 dir2 and it'll report the different files in the directory.

[Ludovic Hirlimann]

Originally posted by cdhostage:

2) after it's been copied, run a comparision check which will tell me what's different and needs to be recopied?

Yes it's called sum or cksum on the command line. You need to run something like that :

Code:
#!/bin/ksh

ORIG_DIR='/home/path/path2'
CPID_DIR='/files/copied'

for i in $ORIG_DIR/*
do
cd $ORIG_DIR
j=`basename $i`
orig_file=`cksum $j`
cd $CPID_DIR
cpid_file=`cksum $j`
if [[ $orig_file -ne $cpid_file ]]
then
  echo "file $j is not correctly copied"
fi
done

hope this helps.