cswiger at mac.com
Thu Aug 18 15:15:25 GMT 2005
Claudio Discepola wrote:
> I have a quick question about blanking a DVD+RW. It seems that even
> after I run the "growisofs -Z /dev/cd0=/dev/zero" command the "Disc
> status" is still seen as "complete" instead of "blank".
Simply using dvd+rw-format doesn't erase all of the previous contents of the
DVD, whereas overwriting with zeros as you've done will obscure the old data
There is a difference between a disk which has never been written to, and a
disk which has been written full of zeros. Note that someone with the right
forensics technology probably could read a zeroed DVD, the same way you can
read most of the data from a hard drive even after a single erasure pass.
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