Side topic to: How to burn Fedora DVDs to avoid readahead bug?

[Andre Robatino]

Frode Petersen wrote:
> Andre Robatino skrev:
>>  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
>
> This is a very long shot, and probably misses the barn completely, but 
> since you said that this change occured recently, I wonder if you 
> experience the same thing as I do (also with recent isos).
>
> If you burn the CD image and try to boot it, does the installer find 
> the media after you tell it to install from 'Local CR-ROM'? (I use the 
> x86_64 iso, so there might be a difference).
>
> Frode
>
  The problem I'm referring to is only with DVDs, since cdrecord 
continues to work perfectly well with CDs.  The first Fedora DVD ISO I 
burned was just a few months ago, after FC6 came out.  I did some tests 
burning DVDs in various ways and running the equivalent of mediacheck 
(/usr/lib/anaconda-runtime/checkisomd5 from the anaconda-runtime 
package) but haven't done a DVD install yet.  Of course it's possible to 
go back to burning half a dozen CDs as a last resort.