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Re: How to check if a DVD is damaged?

On 4 Jul., 15:10, Rodolfo Medina <rodolfo.med...@gmail.com> wrote:
> A few days ago I by chance realized that the DVD-RW I had used for months to do
> may backup was probably damaged: apparently it was not, because I could burn my
> data onto it without problems; but when I tried to copy its content into a hard
> disk I got I/O errors and some directories could not be copied.
> The problem disappeared when I changed the DVD with a brand new one, but now I
> feel not sure: how can I know when my actual backup DVD should in case be
> damaged as well?  Is there any tool for that?
> Thanks for any reply,
> Rodolfo

I dont know the way that you use for your backup. If you create an iso
file before burning it you could use checksums to compare the data on
your disk and the data on your DVD.
Simply mount that iso, create a file with md5sum which contains a sum
for every file inside the iso. Than burn your backup and compare the
disk's content with your checksum file.

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