Ubuntu Installation :: Grub Error: Unknown Filesystem And Grub Error: No Such Disc

Nov 23, 2010

I have a dual boot system with ubuntu 9.10 x64 and Windows 7. Everything has been working fine for a a long time but yesterday I tried to delete an unused partition through the Disk Utility in ubuntu (System->Adminstration->Disk Utility) and everything was messed up. I used to get the "Grub error: Unknown filesystem". I managed to create an ubuntu bootable usb and followed some tutorials for fixing grub but all i managed to do is to get another error: "Grub error: No such disc". After some experimentation i got
"Grub stage 1.5" which gave me a grub> command prompt./dev/sda is the drive containing Windows and Ubuntu.

Code:

[ Boot Info Script 0.55 dated February 15th, 2010
============================= Boot Info Summary: ==============================
=> Grub 0.97 is installed in the MBR of /dev/sda and looks on the same drive
in partition #6 for /boot/grub/stage2 and /boot/grub/menu.lst.

[code].....

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I tried upgrading to 11.04 this morning and after rebooting grub left me at the grub rescue> prompt with the message 'error: unknown filesystem'. I've tried purging and reinstalling grub using a live-cd but no joy.

Let me know what additional information to provide. EDIT: Here is the output from the Boot Info Script

[Code]...

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Feb 25, 2010

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Jan 9, 2010

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Code:

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[Code]....

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Yesterday I installed the latest version of ubuntu to my computer that was already running windows 7. I had everything working fine until in windows I deleted a partition that had nothing in it.

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Mar 7, 2011

Yesterday I installed the latest version of ubuntu to my computer that was already running windows 7. I had everything working fine until in windows I deleted a partition that had nothing in it. After this I restarted but I can't get into either OS.

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[Code]...

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error: unknown filesystem grub rescue>

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Code:
Boot Info Script 0.55 dated February 15th, 2010
= Boot Info Summary: =
=> Grub 2 is installed in the MBR of /dev/sda and looks on the same drive in
partition #7 for /boot/grub.
=> Syslinux is installed in the MBR of /dev/sdb .....

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Jul 14, 2010

I have a laptop with windows7 and ubuntu installed. When I installed Ubuntu it created 4 partitions (2 for swap and 2 for ubuntu). Yesterday, a friend of mine deleted one of the partitions (swap+linux) because they weren't being used (weren't even mounted) and he thought I could use the free space. I kept on using the laptop but today I had to reboot it. Instead of getting the usual grub menu I got this:

Code:

error: unknown filesystem.
grub rescue>

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Code:

#show you the available partitions
ls
#look for boot files on the partitions
ls (hd0,1)/boot

[code]....

The problem is that it doesn't recognise the commands 'linux', 'boot' or 'initrd'...

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Code:
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[Code]...

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[code]....

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