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Thread: system crash, trying to locate new superblock

  1. #11
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    Ubuntu 12.04 Precise Pangolin

    Re: system crash, trying to locate new superblock

    Quote Originally Posted by dinkidonk View Post
    Did you try the guide from #6 while booted into the live USB?
    yes, that is what i did in #9

    But since i use en encrypted disk i used parts from two guides

    https://linuxexpresso.wordpress.com/...ock-in-ubuntu/
    https://alvinabad.wordpress.com/2012...ncrypted-disk/

    And read comments from
    https://serverfault.com/questions/37...encrypted-disk
    .
    Last edited by Drenriza; January 26th, 2021 at 03:29 PM.

  2. #12
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    Re: system crash, trying to locate new superblock

    So it seems that all my stored superblocks are not functional, and i have found a program called testdisk that might be able to do something.
    But i cannot find the package on ubuntu live usb 20.10

    apt-get update
    apt-get install testdisk

    anyone knows why?

  3. #13
    Join Date
    May 2008
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    1,240
    Distro
    Ubuntu 20.04 Focal Fossa

    Re: system crash, trying to locate new superblock

    Quote Originally Posted by Drenriza View Post
    So it seems that all my stored superblocks are not functional, and i have found a program called testdisk that might be able to do something.
    But i cannot find the package on ubuntu live usb 20.10

    apt-get update
    apt-get install testdisk

    anyone knows why?
    You may have to enable other repositories in a live session:-
    Code:
    sudo add-apt-repository universe
    Code:
    sudo add-apt-repository multiiverse
    Code:
    sudo apt update

  4. #14
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    Re: system crash, trying to locate new superblock

    Thanks for the reply tea for one!

    Does anyone know of a way i can mount my drive, with no superblocks working so i can extract data i would like to recover?
    I have tried to mount the drive with

    sudo mount /dev/system/root /media/mounttmp

    but mount comes and say that no working superblocks can be found after working for quite a while and errors out.
    Can it be mounted in a special way where superblocks arent a issue?

  5. #15
    Join Date
    Jun 2018
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    144

    Re: system crash, trying to locate new superblock

    Superblocks contain vital information about the file system and without any valid superblocks the file system is de facto broken and thus cannot be mounted. TestDisk works on unmounted volumes, you should run TestDisk on the unlocked volume / mapper (eg. /dev/dm-X). TestDisk may be able to fix the file system and if not, PhotoRec (part of testdisk) may be able to recover some of the files - but read the docs carefully before starting!
    Last edited by dinkidonk; January 26th, 2021 at 07:51 PM.

  6. #16
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    Re: system crash, trying to locate new superblock

    Thanks for the help all.
    testdisk was not able to fix any of the superblocks or partition tables, so i used testdisk to extract the files i wanted to recover and will reinstall my OS on a new SSD.
    Are there any types of SSD's you can recommend that better can handle untimely shutdowns or system crash so i can avoid such a problem in the future?

  7. #17
    Join Date
    Jun 2018
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    Re: system crash, trying to locate new superblock

    Great that you got your files recovered. No SSD can securely handle a power loss but stay away from the cheapest ones, personally I have good experiences with Crucial's MX series.

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