$ sudo fdisk -l Disk /dev/sda: 500.1 GB, 500107862016 bytes 255 heads, 63 sectors/track, 60801 cylinders, total 976773168 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes Disk identifier: 0x00076ab2 Device Boot Start End Blocks Id System /dev/sda1 * 2048 13672447 6835200 83 Linux /dev/sda2 * 13672448 14258175 292864 83 Linux /dev/sda3 14258176 24023039 4882432 82 Linux swap / Solaris /dev/sda4 24023040 976773167 476375064 83 Linux Disk /dev/mapper/sda4_crypt: 487.8 GB, 487805968384 bytes 255 heads, 63 sectors/track, 59305 cylinders, total 952746032 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes Disk identifier: 0x00000000 Disk /dev/mapper/sda4_crypt doesn't contain a valid partition table Disk /dev/mapper/sda3_crypt: 4997 MB, 4997513216 bytes 255 heads, 63 sectors/track, 607 cylinders, total 9760768 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes Disk identifier: 0xedb08726 Disk /dev/mapper/sda3_crypt doesn't contain a valid partition table $ $ $ sudo update-grub Generating grub.cfg ... Found linux image: /boot/vmlinuz-3.4.7-030407-generic Found initrd image: /boot/initrd.img-3.4.7-030407-generic Found linux image: /boot/vmlinuz-3.2.0-29-generic Found initrd image: /boot/initrd.img-3.2.0-29-generic Found linux image: /boot/vmlinuz-3.2.0-27-generic Found initrd image: /boot/initrd.img-3.2.0-27-generic Found linux image: /boot/vmlinuz-3.2.0-26-generic Found initrd image: /boot/initrd.img-3.2.0-26-generic Found linux image: /boot/vmlinuz-3.2.0-25-generic Found initrd image: /boot/initrd.img-3.2.0-25-generic Found linux image: /boot/vmlinuz-3.2.0-24-generic Found initrd image: /boot/initrd.img-3.2.0-24-generic Found linux image: /boot/vmlinuz-3.2.0-23-generic Found initrd image: /boot/initrd.img-3.2.0-23-generic Found memtest86+ image: /memtest86+.bin done $