Mark Ryden wrote:
Hello,
I wonder if there is a way to check the
sha1sum of Fedora Installation DVD without booting and using
the mediacheck of the FC6 installer program?
I know that the iso I downloaded had correct sha1sum.
But I want to verify that the media I burned also
has a correct sha1sum without rebooting and starting the medaicheck of
the installer.
/dev/hdd in my device (the DVD).
So I tried "sha1sum /dev/hdd" (I tried twice: when /dev/hdd was not
mounted and when it was mounted) but the result I got was different from
what is in the official FC6 sh1sum page.
Also I tried dumping the iso to disk from the CD drive
thus:
dd if=/dev/hdd of=/work/FC6dvd.iso
and than ran "sha1sum /work/FC6dvd.iso" but again I got the same result
as in "sha1sum /dev/hdd" before , which is ***NOT*** what is on the web
page.
I assume that the iso on the media was burned correctly because
others installed from it.
However, is it possible somehow to perform sh1sum correctly on a media
DVD?
What is the length of the /work/FC6dvd.iso file? Is it the i386, x86_64,
or ppc version?
Your file may have extra bytes appended to the end of it because the
kernel does not detect the end of the written data (this is what causes
mediacheck errors in the first place). This extra data causes the
checksum to be calculated incorrectly, but you can truncate the file to
the same as the original size and then the checksum should be OK.
Paul.
