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I have an HCL ME laptop which has a built in windows 7 os. 3 days before I have installed windows 8 along with windows7. Yesterday I have downloaded ubuntu 14.04 iso and installed it using portable usb which created a new harddisk drive, but today when I opened it, it shows unknown file system grub rescue error.

Anon
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Ravindra Reddy
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  • Boot with ubuntu live and Follow here:- http://askubuntu.com/questions/142300/fixing-grub-error-error-unknown-filesystem – Ashu_FalcoN Aug 17 '14 at 08:21

2 Answers2

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After installing Windows 8 windows Removes Other bootloader (Ubuntu's) You can Reinstall Grub by following Documentation from ubuntu:- here

Ashu_FalcoN
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  • THANKS FOR THE RESPONSE. BUT I AM UNABLE TO MOVE TO BOOT MENU ALSO.THE MOMENT I LOGON TO THE SYSTEM IT SHOWS GRUB ERROR AND UNABLE TO MOVE TO BOOT MENU – Ravindra Reddy Aug 18 '14 at 08:20
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unknown filesystem
grub rescue>

This error is due to deletion of the Ubuntu drive where your Ubuntu OS was installed, so set the Windows boot loader by typing the following commands at the grub rescue prompt:

set boot=(hd0,msdos6)
set prefix=(hd0,msdos6)/boot/grub
insmod normal
normal

The drive msdos 7/6/5/4 depends upon the system user.

karel
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Ravindra Reddy
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