Scenario: I have a hard disk with a bootable sda1 partition and an Linux LVM. I seem to have corrupted the MBR? or Grub? not sure. I know it no longer boots and even with boot-repair and a Ubuntu live usb I was able to restore it. Following a "fix" with boot-repair I get "missing operating system" Can't i just reinstall grub or a new menu.lst? Disk /dev/sda: 320.1 GB, 320072933376 bytes 255 heads, 63 sectors/track, 38913 cylinders, total 625142448 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x0007b68f Device Boot Start End Blocks Id System /dev/sda1 * 2048 499711 248832 83 Linux /dev/sda2 501758 625141759 312320001 5 Extended /dev/sda5 501760 625141759 312320000 8e Linux LVM