Installed Ubuntu 12.04 alongside the Windows 7 two weeks ago. Initially haven't any issues with that. day ago installed updates on Ubuntu and after restarting the system found the absence of Win7 in Grub list. Before the HDD has been partitioned on two volumes Disk C and Work Disk(don't remember the name). When doing the fdisk -l:

Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes Disk identifier: 0xa93031e0

Device Boot Start End Blocks Id System /dev/sda1 * 2048 408833842 204415897+ 7 HPFS/NTFS/exFAT /dev/sda2 488386560 976773119 244193280 7 HPFS/NTFS/exFAT /dev/sda3 408834046 488386559 39776257 5 Extended Partition 3 does not start on physical sector boundary. /dev/sda5 408834048 484421631 37793792 83 Linux /dev/sda6 484423680 488386559 1981440 82 Linux swap / Solaris

Partition table entries are not in disk order

Disk /dev/mmcblk0: 3965 MB, 3965190144 bytes 49 heads, 48 sectors/track, 3292 cylinders, total 7744512 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: 0x00000000

    Device Boot      Start         End      Blocks   Id  System

/dev/mmcblk0p1 8192 7744511 3868160 b W95 FAT32

When sudo mount /dev/sda ~/1 -o offset [488386560*512] - opens and mounts WORK disk.

Need help: how to See and mount disk C. how to see and adjust the Grub to appear both systems in Grub menu when loading?