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Thread: error: unknown filesystem= unbootable computer

  1. #11
    Join Date
    Jan 2011
    Oceanside, CA
    Ubuntu 14.04 Trusty Tahr

    Re: error: unknown filesystem= unbootable computer

    Thank you so much OldFred,
    After completing the LILO commands here my windows 7 OS fired right up. I have spent the last couple of hours making multiple backups and organizing the D drive to make room for a backup of the OS as well as backing it up before moving on to trying to get Ubuntu running alongside windows 7.

    How should I proceed from here to clean up the corrupt Ubuntu partition?

  2. #12
    Join Date
    Jun 2009
    SW Forida
    Ubuntu 16.04 Xenial Xerus

    Re: error: unknown filesystem= unbootable computer

    If you use manual instal you can just overwrite it. If resizing, use Windows to shrink the NTFS partition, reboot Windows so it can run its chkdsk and make whatever repairs it likes to do on a new size. Do not create partitions with Windows.
    Then use gparted to either create the partitions you want or delete the old partition and install into the unallocated space. I always prefer the Something Else or manual install, but if you have unallocated you should not have issues. Some in reinstalling or using LVM overwrite the entire drive, so that is why backups are so important. (not just copies to another partition on the same drive).

    For the Total space you want for Ubuntu:
    Ubuntu's standard install is just / (root) & swap, but it is better to add another partition for /home if allocating over 30GB.:
    for gpt(GUID) or MBR(msdos) partitioning
    Ubuntu partitions - smaller root only where hard drive space is limited.
    If total space less than about 30GB just use / not separate /home or standard install.
    1. 10-25 GB Mountpoint / primary or logical beginning ext4(or ext3)
    2. all but 2 GB Mountpoint /home logical beginning ext4(or ext3)
    3. 2 GB Mountpoint swap logical

    Depending on how much memory you have you may not absolutely need swap but having some is still recommended. I do not hibernate (boots fast enough for me) but if hibernating then you need swap equal to RAM in GiB not GB. And if dual booting with windows a shared NTFS partition is also recommended. But you usually cannot create that as part of the install, just leave some space. Or partition in advance (recommended).
    One advantage of partitioning in advance is that the installer will use the swap space to speed up the install. Thanks Herman for the tip.
    suggested partitions for just Ubuntu on 3TB drive.
    Another advanced suggestion from TheFu with Multiple / (root) - Post #5 similar to what I actually do
    For more info on UEFI boot install & repair - Regularly Updated :
    Please use Thread Tools above first post to change to [Solved] when/if answered completely.

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