Unknown file system : grub Rescue

Posted by Rahul Rodrigues on Ask Ubuntu See other posts from Ask Ubuntu or by Rahul Rodrigues
Published on 2012-03-30T03:29:26Z Indexed on 2012/03/30 5:42 UTC
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boot

I have Lenovo Y560 Laptop on which installed Windows 7 and Ubuntu 11.10 as dual boot.Due to some reason i had to recover boot loader using bootrec.exe /fixmbr and bootrec.exe /fix boot,It created one partition of size 198MB named "tet" and my both os were working fine.

Ysterday while making some changes in partition table i deleted that "tets" partition and after reboot im getting following error

Error:unknow filesystem grub rescue>

i tried to boot from windows installer cd and but it stucks at "starting windows" so not able to run commands which i have mentioned earliar and tried to boot from Ubuntu 11.10,it stucks after showing following error

memory full can't kill anymore process.

Please help me out

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