How to burn Fedora DVDs to avoid readahead bug? (post-F7 update)
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It appears that the F7 installer has been modified so that padding is
no longer necessary for the discs to pass mediacheck. I tested this
with my old unpadded sets of CDs for Fedora 2 through 5. On a machine
with a DVD drive which is known vulnerable to the readahead bug, running
the F7 installer, every one of these discs passes. Running the FC6
installer, or using the equivalent checkisomd5 from the anaconda-runtime
package while running a fully updated FC6, at least half of the FC2
discs fail (these were the first I checked so I didn't check the others).
The fact that old discs now pass means that the change is probably in
the installer itself. It's unlikely that the readahead bug itself was
fixed, though I can't confirm since the machine with the vulnerable DVD
drive is still running FC6 (I was unable to install F7 on it). I'm
guessing that since mkisofs by default adds enough padding when creating
an ISO to protect the included files, mediacheck was modified so that
instead of checking the entire ISO, it only checks the part which
includes the actual files, not the mkisofs-added padding at the end.
Can anyone confirm this?
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