On 11:25 12 Aug 2004, Bill Gradwohl <bill@xxxxxxx> wrote: | jludwig wrote: | >You could though do a compare (cmp) | >mounting the ISO on a loop and do a directory cmp. | | I'm not trying to check an iso. I'm using a DVD as a backup device. | | I'm rsyncing whatever I want to backup to a special location | (/snapshot/boxname/Thu.040812) on a separate physical volume and from | there I cdrecord that location to the DVD. [...] | | I used diff -r to compare the hard drive location with the DVD, but diff | complains when it hits a socket file [...] | | The thought of abandoning diff -r and replacing it with a find/cmp | combination was distasteful, so I thought about it and figured I was | wasting my time doing the compares if cdrecord or the O/S did it as a | read after write process. Trouble is I couldn't find an authoritative | source telling me that a read after write is being done and I've got to | have some assurance that the DVD is an exact copy of the staging area. The OS certainly doesn't. And by default cdrecord doesn't. Why not just "rsync -n" back from the DVD to your data and see if anything's been missed? Cheers, -- Cameron Simpson <cs@xxxxxxxxxx> DoD#743 http://www.cskk.ezoshosting.com/cs/ I have a flawless philosophical and scientific model of reality. Unfortunately, it's actual size. We must never be dogmatic. Anyone who says otherwise is wrong. Will betray country for food. Annoy the censors -- mention Paul Bernardo and Karla Homolka in your .signature. - studly@xxxxxxxxxxxxxxx (Kevin W. McAuley)
