Ecco quello a cui mi riferivo io:
http://www.redhat.com/support/resources/gotchas/7.2/
(guarda la FAQ "CD-ROM fails to mount after install/upgrade to 7.2 ")
Non so se risolve il problema però è da tenere di conto....
Visto che è corta te la riporto direttamente:
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CD-ROM fails to mount after install/upgrade to 7.2
We have found an installer related bug in some hardware set-ups. After an installation of 7.2 or upgrade of an existing system, these units report "/dev/cdrom not a valid block device" causing the mount to fail and a possible system crash. Running the command as root "depmod -ae" should solve this issue. Additionally, upgrading to the latest kernel errata will solve this issue.
To view the bug report: Bugzilla 55071
For the kernel errata please visit:
http://www.redhat.com/support/errata/RHSA-2001-142.html
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