Annihilating Grub Error 'Unknown Filesystem'

asked 2012-12-28 13:05:56 -0500

ioncube gravatar image

hey there... I had installed Fedora17 32bit on my external drive 160GB & I was loving it for about 2 weeks...However something bad happened & now whenever I boot via external drive 'Grub Error, unknown filesystem emerges & I can't proceed. I had been using following partitioing layout: (all as ext4)

/boot 300mb / 30gb /opt 9gb swap 2gb ...rest as NTFS (to be used universally)

The following application (under win7) has the feature of even identifying Linux based file-systems but as you can see everything is corrupted.

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Now I can absolutely recall that I did two things that I believe may be the source of corruption & I urgently need help in troubleshooting it.

1] First thing I did was to apply this tutorial: http://www.omgubuntu.co.uk/2011/12/how-to-easily-mount-the-galaxy-nexus-on-ubuntu-11-10-via-unity I know this may appear stupid to apply Ubuntu way over Fedora but I was close to solving it...After applying this tutorial I did log-off several times perfectly but didn't reboot!

2] This may well be the probable reason of corruption. As I said I had one NTFS drive so that I can use it even under my Win7...so I logged on to my win7 as always. I had to do some data transfer from my windows to that NTFS partition but I saw some folder(s) namely ./install or something like that those may have been created by Fedora but I (being silly) just deleted them I don't know whether they were important or not but after this I shutdown my win7 then booted externally & first time my Fedora took me to Grub selection menu but failed to start I can't recall comprehensively but it asked me to press Ctrl+D or enter root psw for recovery I suppose. I panicked (because I have installed many educational application in my Fedora) & just restarted via pressing Ctrl+Alt+Del the final unbreakable error 'Grub error Unknown filesystem'

Fedora & my win7 operate interdependently win7 in internal drive second in an external because I feared & can't risk Win7 boot corruption. Plz help guys..plz

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Comments

I have a Galaxy Nexus and Fedora 17. I accessed storage on the phone by plugging it into the computer with a USB cable and clicking on the notification that popped up to open the file manager. Please be careful applying instructions you don't understand, readers!

randomuser gravatar imagerandomuser ( 2012-12-30 11:57:33 -0500 )edit

Try booting a fedora live image and accessing these filesystems. It would be useful to know if they still function. If so, attempt to reinstall grub from rescue mode.

randomuser gravatar imagerandomuser ( 2012-12-30 12:00:32 -0500 )edit

You can try checking and correcting the partition type with fdisk or parted then running an fsck. I would be wary of your Windows-based ext drivers, but that may just be superstition...

randomuser gravatar imagerandomuser ( 2012-12-31 08:45:39 -0500 )edit

Your output from blkid is gone and you haven't posted fdisk -l . You need to provide more information for us to help you.

randomuser gravatar imagerandomuser ( 2013-01-01 17:11:44 -0500 )edit