Dear SL developers, About 1 in 10 times booting a KVM Virtual machine of Centos 5 with SL6 fails, the VM does not detect the virtual hard drive. I did some googling around for the cause and it seems the BIOS provided with SL6/RHEL6 KVM has an issue (race condition) with the kernel in Centos 5/RHEL 5. At the moment I am not deploying this on many machines so I simply installed the SL6 kernel on Centos 5 and the issue is resolved for my hudson build / test system. I must make it clear that I have not verified this with SL5 yet. If this is a high enough priority issue for others too I could look into it more, but for my current use the workaround I mentioned with SL6 kernels is enough for my use. Regards Owen