[Cialug] rip an ISO

[Renegade Muskrat]

 >> Does that just skip over the header stuff burned on the disk and
 >md5sum
 >> the data portion?
 >
 >Yes and no.  All it does is the same original dd command setting the
 >block
 >size to 2k and doesn't assume EOF=end of data.
 >
 >I'm certain that the same md5sum would be generated with:
 >  dd if=/dev/cdromof=debian.iso bs=2k
 >
 >It's always better to ask (the iso image) than assume things (like
 >block
 >size and number of blocks).

This morning i ripped a DVD twice with dd, once with just "if" and "of" 
specified, and once with Paul Gray's extra switches. The image ripped 
just with "if" and "of" was 2048 bytes larger than the image ripped 
with extra switches. Using cmp i determined the extra bytes are at the 
end of the file; so it would appear that regular dd is grabbing one 
block of extra data.
                                                -- Dan
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       Daniel Ramaley                  3118 Cottage Grove Ave Apt 8
       dramaley at spatulacity dot cx        Des Moines, Iowa 50311
       http://www.spatulacity.cx/                    (515) 271-5233
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