grub

Systems

SuperMicro Server + CentOS 6.6 Kernel / PCIe Power

I recently had a bare metal SuperMicro server which was running an installation of CentOS 6.6. There was an issue with it where the NIC would randomly stop working. There seems to be an issue with PCIe Active State Power Management in some Linux Kernels (see http://bugs.centos.org/view.php?id=6814 as example). The workaround for this is pretty easy.. […]

Systems

XenServer 6.1 Ubuntu Paravirtualized Will Not Boot After Kernel Upgrade

If you are running Ubuntu on XenServer, you are probably aware that you are running this thing with the paravirtualized modified kernel. Yesterday I ran into this issue where the kernel update caused the server not to boot any more. Upon logging into the XenServer, i got this error: Error: Starting VM – Using to […]