[arch-general] mounting a data dvd fails

[JM]

The kernel installed is standard kernel26 from [core]. The system is i686.

pacman -Qi kernel26
Name          : kernel26
Version         : 2.6.30.6-1

$ uname -a
Linux hp510 2.6.30-ARCH #1 SMP PREEMPT Wed Sep 9 12:37:32 UTC 2009
i686 Intel(R) Pentium(R) M processor 2.26GHz GenuineIntel GNU/Linux

I checked grub's menu.lst file, reinstalled the kernel with pacman -S
kernel26 and rebooted, just to be sure. Still the same error message.

Thanks for suggestions.

JM