Every time I've tried comparing in that way, I've had the same result you did. The only comparison I use any more comes from mounting both the CD and the ISO, and doing a recursive diff on them as filesystems.
++ kevin On Tue, 15 Oct 2002, Tim Wunder wrote: > OK, I'm puzzled by this. Can anyone explain? > > I installed RH8 from ISOs I downloaded. I verified each ISO file and they were all >good. I then burned CD's 1, 2 and 3 to CDR and attempted to verify them in the >following ways: > 1. Performed 'diff /dev/cdrom /path/to/downloaded.iso' > 2. Performed 'md5sum /dev/cdrom' > 3. Performed 'dd if=/dev/cdrom of=/some/file.iso' and ran md5sum on /some/file.iso > > In each case, for all three downloads, the CDRs were deemed to be different from the >ISO files. As a result, I re-burned CD1 (at a more conservative 4x instead of 8x) and >performed all the same tests. It too, found the burned CDR to be different from the >ISO file. > > I then tested the two files created from both copies of CD1, using dd, and both had >the same md5sum, which was different from the source ISO file. I then made the bold >assumption that two bad burns couldn't have the same md5sum and determined that the >burns *must've* been ok. Which doesn't make sense either. > > So, I decided to try the disks anyway to see what would happen. As it turns out, >RedHat provides a disk check at the beginning of the install process. I put each of >the 3 disks thru redhat's disk check, and each passed the test. I then continued with >the install process and managed to get RH8 installed onto 2 different machines using >these disks (an AMD Athlon 950 and a K6 450). > > Is there any logical explanation why the md5sum of a properly burned CD of an ISO >file would have a *different* md5sum than the ISO file? Until recently, I would've >said no, the CDR and the ISO should have the same md5sum. But my experience with >these RH8 ISOs seems to contradict that. > > Regards, > Tim > > _______________________________________________ > Linux-users mailing list > [EMAIL PROTECTED] > Unsubscribe/Suspend/Etc -> http://www.linux-sxs.org/mailman/listinfo/linux-users > _______________________________________________ Linux-users mailing list [EMAIL PROTECTED] Unsubscribe/Suspend/Etc -> http://www.linux-sxs.org/mailman/listinfo/linux-users
