Linux, Ramdisk.
Oracle Linux installation DVD [Choose “Troubleshooting”, “Rescue a Oracle Linux system”, “3) Skip to shell”] Activate and mount the root volume sh-4.2# vgchange -a y ol 2 logical volume(s) in volume group "ol" now active sh-4.2# mount /dev/mapper/ol-root /mnt` Create a zram to store our disk backup