How to burn Fedora DVDs to avoid readahead bug?

[Andre Robatino]

  When I burned the Fedora ISOs to CDs, I used cdrecord with padding to 
avoid the readahead bug - see

http://www.troubleshooters.com/linux/coasterless.htm

for how.  In short, you use something like

cdrecord -v dev=/dev/cdrom -dao -pad padsize=63s FC-6-i386-disc1.iso

It turns out that the same precaution is necessary with DVDs, and until 
recently I was able to use cdrecord for this, like

cdrecord -v dev=/dev/dvd -dao -pad padsize=63s FC-6-i386-DVD.iso

even though a lot of ugly-looking error messages appeared before the 
burn commenced.  But in the last month or so, instead of burning, 
cdrecord simply gives up.  See

https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=233745

I know about growisofs, but unfortunately it's incapable of putting 
padding on the DVD _after_ the ISO file (I know it has a -pad option, 
but it just passes it through to mkisofs, which provides padding 
_inside_ the ISO, which isn't what is needed, and when burning an ISO 
file it can't be used anyway).  I tried once using dd to manually add 
zero padding after the ISO, but although the resulting DVD passed 
mediacheck, it failed to boot properly.  So it seems that at the moment 
there's no tool that can reliably burn a DVD and pad it properly.  After 
gradually learning over several years how to reliably burn Fedora ISOs, 
I don't want to go back to mediacheck hell.  As I see it, there are 
several options:

1) Fix the readahead bug.  Unfortunately, we all know that will never 
happen.  No one who's qualified cares enough to do it.

2) Fix cdrecord.  The last time I successfully used it was March 29, so 
some update since then broke it.  It's not the kernel, since after 
booting into the same kernel I was using then, it was still broken.

3) Find some other tool besides cdrecord that can do the necessary 
padding for DVDs.  Are there any?

4) Modify mediacheck.  I know that by default mkisofs provides enough 
padding to protect the files inside the ISO from the readahead bug.  But 
mediacheck is apparently checking the entire ISO, including the padded 
part at the end after the actual files in it, where the readahead bug 
occurs.  Can it be tweaked to just check up to the end of the last file 
inside the ISO?  And can something similar be done so no errors occur 
during the actual install either?