On 30/04/04 08:09, James Ralston wrote:
FC2-test2-i386-DVD.iso was 4306010112 bytes, which is a multiple of
32KiB (specifically, 4306010112 bytes = 131409 32KiB-sized blocks).
However, FC2-test3-i386-DVD.iso is 4379752448 bytes, which is *not* a
multiple of 32KiB:
$ factor 4379752448
4379752448: 2 2 2 2 2 2 2 2 2 2 2 2138551
Therefore, growisofs pads it by 18432 bytes up to 4379770880 bytes
(133660 32KiB-sized blocks) when burning it. This makes it a pain to
verify the MD5 checksums; instead of being able to just run md5sum on
the device (e.g., "md5sum /dev/hdc"), you have to use dd to read only
the size of the ISO (without the pad).
Was FC2-test3-i386-DVD.iso not being a multiple of 32KiB blocks in
size intentional, or just an oversight? And will the DVD ISO for FC2
final be a multiple of 32KiB blocks in length?
Could this have contributed to my problem burning it?
I blanked the DVD+RW with
# growisofs -Z /dev/dvd=/dev/zero
(or something like that) just fine.
But when I'd burnt the DVD+RW with
# growisofs -dvd-compat -Z /dev/dvd=FC2-test3-i386-DVD.iso
it stayed at the stage of writing the lead-out for over an hour.