I've got no idea why this is happening. The machine in question is at work, and is almost identical to this one. They both have a 3GHz P4 in an Intel D865PERL motherboard, both dual boot XP or FC5, both are running a Seagate SATA HDD. This one has 2G RAM, but the one at work only has 512M. This machine gets updated very regularly, but the one at work only gets updated infrequently, because I have to run XP to do my work. When I updated the work machine last week, I received kernel 2.6.18-1.2257.fc5smp, according to the Grub screen. If I select the 1.2239 kernel it boots ok. If I select the 1.2257 kernel I get Uncompressing Linux... Ok, booting the kernel; Red Hat nash version 5.0.32 starting mount: could not find filesystem '/dev/root' setuproot: moving /dev failed: No such file or directory setuproot: error mounting /proc: No such file or directory setuproot: error mounting /sys: No such file or directory switchroot: mount failed: No such file or directory Kernel panic - not syncing: Attempted to kill init! I found a thread about a similar sounding problem from a couple of months back. It suggested the command mkinitrd --with=raid456 which didn't help me any. I'm not using RAID on either of these machines anyway. I suspect that because the work machine gets updated so infrequently, sometime it has missed something important in an update, that is not now on the mirrors because they have been updated again. Am I correct? Anyway, am I on the right track to fixing this with the mkinitrd command? Thanks in advance to anybody who can please give me the appropriate magical incantation to get the machine to boot the latest kernel. Dave Fletcher -- Registered Linux user number 393408 I use and recommend the email service at 1 & 1 For domain registration, email and web hosting please visit: http://oneandone.co.uk/xml/init?k_id=6389763