for (nearly) identical hardware i use the following commands (from a live 
distro like knoppix)

// create compressed and splitted image
dd if=/dev/sd? | gzip -c | split -b 699m - /space/for/imagefiles/image.gz.  
<---- don't forget that last dot            
// verify
cat /space/for/imagefiles/image.gz.* | gzip -d | cmp - /dev/sd?             
// restore
cat /space/for/imagefiles/image.gz.* | gzip -d | dd of=/dev/sd?

this is of course os/fs independent.

best regards. robert
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