Re: test3 DVD ISO not a multiple of 32KiB blocks

[Craig Emery <fedora-test cemery org uk>]

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.