On Wed, Mar 05, 2003 at 11:03:28AM -0800, Craig Dickson wrote: > bob parker wrote: > > > On Thu, 6 Mar 2003 04:22, Ray wrote: > > > how do i verify that the burned cd is correctly burned? > > > > > > i burned a set of Debian 3.0r1 cds and have md5sums of the isos, but they > > > don't match the output of > > > md5sum -b /dev/cdrom > > > > Not really an expert on what happens on cds but I belive it has something to > > do with the some extra nulls packing it out to the end of a 2048 block or > > something like that. > > > > In any case the actual cd generally has a different md5sum than the iso. > > > > One way: > > cat /dev/cdrom > test.iso > > md5sum test.iso > > md5sum original.iso
Yes they are different :-) > Isn't > > md5sum /dev/cdrom > > equivalent to > > cat /dev/cdrom >test.iso > md5sum test.iso > I think so. But there are junk sectors added when creating data on CD. http://www.debian.org/doc/manuals/reference/ch-tune.en.html#s9.3.7 So read exact # of sectors back to harddisk. Run MD5 or cmp :-) -- ~\^o^/~~~ ~\^.^/~~~ ~\^*^/~~~ ~\^_^/~~~ ~\^+^/~~~ ~\^:^/~~~ ~\^v^/~~~ +++++ Osamu Aoki <[EMAIL PROTECTED]> Cupertino CA USA, GPG-key: A8061F32 .''`. Debian Reference: post-installation user's guide for non-developers : :' : http://qref.sf.net and http://people.debian.org/~osamu `. `' "Our Priorities are Our Users and Free Software" --- Social Contract -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
