On Tue, 2002-10-08 at 10:39, M A Young wrote: > > On 8 Oct 2002, John Weber wrote: > > > On Tue, 2002-10-08 at 06:17, Michael Schwendt wrote: > > > Safer: > > > > > > $ md5sum /dev/cdrom > > > > Is this the supposed to be the same test as the mediacheck routine? I > > tried this on both an umounted and mounted disc #1 and in both cases it > > appears to read the disk for a few minutes and then gives > > > > [jweber@ceora RH8.0]$ md5sum /dev/cdrom > > md5sum: /dev/cdrom: Input/output error > > The md5sum is similar but not the same as the linux mediacheck. The > mediacheck compares a stored checksum with the checksum of almost all of > the rest of the disk. Running md5sum /dev/cdrom will checksum the whole > disk. However, as this often includes extra blank sectors at the end, > you frequently the wrong answer, plus it may try to read beyond the end of > the disk, which is why you got the above error. > If you want to get the advertised iso checksums, work out how long the > disk should be and just checksum that bit, eg. for disk 1 > dd if=/dev/cdrom bs=1024 count=659488 | md5sum > > Michael Young Thanks for the info. I'm new to CD burning. I'm an old unix tape user.:) -- John S. Weber jweber@math.cudenver.edu http://www.users.qwest.net/~weberjohns
