Missing Linux partition after Windows upgrade

[aruninterval]

Hi,

My computer had dual boot option. Windows 10 and Ubunto 16.04.

But after some upgrade,it wont dual boot. I used livecd and opened gparted. Now the ubuntu partiton is shown as unallocated.

This is the gparted output:

274218

Also, the fdisk output is shown below:

Device Boot Start End Sectors Size Id Type
/dev/sda1 * 2048 487422149 487420102 232.4G 7 HPFS/NTFS/exFAT
/dev/sda2 487424000 488345599 921600 450M 27 Hidden NTFS WinRE
/dev/sda3 488347646 976771071 488423426 232.9G f W95 Ext'd (LBA)
/dev/sda5 968583168 976771071 8187904 3.9G 82 Linux swap / Solaris

Partition 3 does not start on physical sector boundary.




Disk /dev/sdb: 14.6 GiB, 15631122432 bytes, 30529536 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
Disklabel type: dos
Disk identifier: 0x0002252c

Device Boot Start End Sectors Size Id Type
/dev/sdb1 * 2048 30529535 30527488 14.6G c W95 FAT32 (LBA)

I would appreciate any help in this case.

Regards
Arun

[oldfred]

Moved to your own thread as your issue is different than original solved thread. Issue is that Windows update forgets to write the Linux partition back into partition table. Some are able to just recover partition and system works, most do have to use Boot-Repair or manually reinstall grub to MBR.

http://askubuntu.com/questions/654386/windows-10-upgrade-lead-into-grub-rescue/655080#655080
Windows 7 to Windows 10 MBR partition missing
http://ubuntuforums.org/showthread.php?t=2288988
http://ubuntuforums.org/showthread.php?t=2290190
http://ubuntuforums.org/showthread.php?t=2292545
Use parted rescue to restore missing partition details in post #22
http://ubuntuforums.org/showthread.php?t=1775331
http://www.gnu.org/software/parted/manual/html_node/rescue.html
http://gparted.sourceforge.net/faq.php/#faq-22
Parted rescue seems easier than testdisk
http://askubuntu.com/questions/665445/upgraded-to-windows-10-on-dual-boot-and-cant-boot-to-ubuntu-partition/665462