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Fedora partitions are not recognized after a Windows update

asked 2017-12-10 13:58:37 -0500

MaxMatic gravatar image


Yesterday, I did a Windows update, and I don't know how, it ruined my fedora partitions.
I have a SSD, with some partitions for Windows, and two partitions for Fedora:
- /boot/EFI (500 Mo)
- / (88 Go) in ext4 format.

Now, when I look on Gparted for example, my two fedora partitions are marked as "unknown", with a /!\ before, as you can see in this picture.

Before the Windows update, it was working great. When I was switching the PC on, it was bringing me on the Grub.
Now it starts on Windows directly, and my fedora partitions seem to be corrupted...

Thanks for your help !

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Follow this how to restore grub instruction, if this doesn't fix it, try running testdisk or this ubuntu instructions just change the commands to fedora commands.

Phuti gravatar imagePhuti ( 2017-12-10 16:54:30 -0500 )edit

How did you run gparted? Where you able to boot Fedora? Or is there a Windows version of gparted out there?

wallyk gravatar imagewallyk ( 2017-12-11 00:20:59 -0500 )edit

1 Answer

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answered 2017-12-18 02:02:36 -0500

lispy gravatar image
Boot your system using a "live DVD" or (preferably) a “Live Demo” image on a USB drive

Open a shell window and become root: sudo su

Create a directory: mkdir /x

You need to know which drive partition holds the target system, i.e. the Linux system you want to boot. For clarity, let’s discuss things using the shell variables $partition and $drive. An example might be: partition=/dev/sda6 ; drive=/dev/sda

If you happen to know, based on experience, where the target system lives, define $partition and $drive accordingly, and skip to step 8. If you need to figure it out, proceed as follows:

    Get a list of disk drives: cd /dev/disk/by-label; ls -al

    With any luck, you will see something like this:

    drwxr-xr-x 2 root root 200 Mar 26 07:59 .
    drwxr-xr-x 6 root root 120 Mar 26 08:00 ..
    lrwxrwxrwx 1 root root  10 Mar 26 08:00 emu -> ../../sda9
    lrwxrwxrwx 1 root root  10 Mar 26 08:00 linux-root -> ../../sda5
    lrwxrwxrwx 1 root root  11 Mar 26 08:00 lnx -> ../../sda11
    lrwxrwxrwx 1 root root  11 Mar 26 08:00 more -> ../../sda10
    lrwxrwxrwx 1 root root  10 Mar 26 08:00 SERVICEV003 -> ../../sda1
    lrwxrwxrwx 1 root root  10 Mar 26 08:00 SW_Preload -> ../../sda2
    lrwxrwxrwx 1 root root  10 Mar 26 08:00 usrsrc -> ../../sda7

    If necessary, you can get additional information from cfdisk /dev/sda. This has the advantage of showing the partition size, along with the partition-type for each partition.
    Identify which partition(s) might plausibly hold the target system’s root directory. In the example above, linux-root is almost certainly the right answer, but lnx is a semi-plausible alternative.
    To make sure, mount each plausible partition and take a look at it.

       mount /dev/sda11 /x
       ls -al /x/boot/vm*
       ls: cannot access /x/boot/vm*: No such file or directory

    That tells us that sda11 is definitely not the right answer. So let’s try again:

       umount /x            # unmount previous hypothesis

       mount /dev/sda5 /x
       ls -al /x/boot/vm*
      -rw-r--r-- 1 root root 4275712 May 30  2013 /boot/vmlinuz-
      -rw-r--r-- 1 root root 4678720 Aug 25  2013 /boot/vmlinuz-3.10.9
      -rw-r--r-- 1 root root 4599824 Mar 23 18:45 /boot/vmlinuz-3.11.3+
      -rw-r--r-- 1 root root 4599824 Mar 23 18:43 /boot/vmlinuz-3.11.3+.old

When you find the desired partition, leave it mounted on the mountpoint /x.

Define $partition and $drive accordingly. Example: partition=/dev/sda5 drive=/dev/sda.

If not already mounted: mount $partition /x

Reinstall grub: grub-install --root-directory=/x $drive

Beware: You want to install grub on the drive (e.g. /dev/sda). If you install it on the partition (e.g. /dev/sda6), the grub-install program won’t complain, but the results won’t be what you wanted.
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Asked: 2017-12-10 13:58:37 -0500

Seen: 109 times

Last updated: Dec 10 '17