Hi Roland! (2010/08/23 18:11), Roland RoLaNd wrote: > OS: centos 5.2 > I'm using it for local development with a number of Virtual hosts, Whole VM are 5.2? If yes, the problem VM's DIMM are corrupted now. If you have hardware trouble and Nehalem server, you can recognize host hardware error. Your PC can't see these problem, run memtest86! If No, the problem might be fixed by latest kernel(Centos5.5). You can copy vm image, and upgrade into latest revision(#yum update). then you can find the problem would be fixed by latest fix.