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Thread: [Boot-Repair] Graphical tool to repair the PC boot in one click

  1. #1471
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    Re: [Boot-Repair] Graphical tool to repair the PC boot in 1 click!

    Two possibilities.
    One is that some BIOS will not boot without a partition with a boot flag. Now with your 3TB drive you have to use gpt and boot flags with gpt are only supposed to be on efi partitions for UEFI booting. So BIOS is violating standards if it requires boot flag. The most strange part is that most with issue are Intel motherboards and Intel is one the major developers of UEFI that uses gpt. With UEFI the efi partition is supposed to be first, but since you are booting with BIOS I might experiment with just creating a small partition somewhere and add a boot flag.
    Second is that some systems have either BIOS or grub issues with very large / (root) partitions. Grub supposedly fixed a bug with the very large partitions, but I normally suggest a 25GB / (root) and use rest of drive as /home or what I actually use /mnt/data partition.

    My standard partitioning but it totally depends on what you may want to use system for. One large /home or data partition may make sense if a media server, but if for data, one large partition can be more difficult to backup, run fsck on when corruption may occur or other issues.

    My current system is BIOS only, but all new drives including my SSD have both bios_grub for current boot and an efi for new a system. Then I can move drive to new system and have efi partition available without totally reformatting.

    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.:
    Only if gpt - all partitions in gpt are primary:
    gpt: 250 MB efi FAT32 w/boot flag (for UEFI boot or future use for UEFI, you only can have one per drive, so if already existing do not attempt another)
    gpt: 1 MB No Format w/bios_grub flag (for BIOS boot not required for UEFI)
    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.
    https://help.ubuntu.com/community/DiskSpace
    suggested partitions for just Ubuntu on 3TB drive.
    http://askubuntu.com/questions/33643...rtition-scheme
    Another advanced suggestion from TheFu - Post #6 similar to what I actually do
    http://ubuntuforums.org/showthread.php?t=2170308
    http://ubuntuforums.org/showthread.php?t=2021534
    For more info on UEFI boot install & repair - Regularly Updated :
    http://ubuntuforums.org/showthread.php?t=2147295
    Please use Thread Tools above first post to change to [Solved] when/if answered completely.

  2. #1472
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    Re: [Boot-Repair] Graphical tool to repair the PC boot in 1 click!

    Hello Everyone,

    Let me begin by providing a little information about my problem.

    I have windows 7 and ubuntu 13.04 installed on my 500 gb hard disk. Everything was working fine till the time I switched on my laptop to see a screen that said:

    error: unknown file system
    grub rescue>

    After a bit of research, i made a bootable disk of boot - repair and performed recommended repair.

    After that when i rebooted the machine, it directly booted into windows, i.e., there was no grub menu to choose an OS.

    Here is the link that was generated:

    http://paste.ubuntu.com/6216425/

    Please tell me what to do..I need to access my ubuntu desperately.

    My only request to all of you is .. kindly help me recover the data of my home folder through any means so that i cn take a backup..after which i shall fresh install everything.

    Looking forward to some help at the earliest.

    Thanks

  3. #1473
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    Re: [Boot-Repair] Graphical tool to repair the PC boot in 1 click!

    @Sumit1991
    Were you using grub2dos and EasyBCD to boot or grub?
    It looks like you may have some corruption in your sda5 Linux partition. So Boot-Repair was not able to see Linux install to know to reinstall grub to MBR.

    You may just need to run fsck from live Ubuntu.
    #From liveCD so everything is unmounted,swap off if necessary, change example shown with partition sda5 to your partition(s)
    #e2fsck is used to check the ext2/ext3/ext4 family of file systems. -p trys fixes where response not required
    sudo e2fsck -C0 -p -f -v /dev/sda5
    #if errors: -y auto answers yes for fixes needing response see man e2fsck
    sudo e2fsck -f -y -v /dev/sda5
    For more info on UEFI boot install & repair - Regularly Updated :
    http://ubuntuforums.org/showthread.php?t=2147295
    Please use Thread Tools above first post to change to [Solved] when/if answered completely.

  4. #1474
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    Re: [Boot-Repair] Graphical tool to repair the PC boot in 1 click!

    Thanks for ur response oldfred..!
    I was using GRUB earlier to boot..

    And i will just try and run these commands and let u know about the outcome of the same..!

  5. #1475
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    Re: [Boot-Repair] Graphical tool to repair the PC boot in 1 click!

    Screenshot.png
    @Oldfred






    This is the output I got when I run these commands.. Please help!

  6. #1476
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    Re: [Boot-Repair] Graphical tool to repair the PC boot in one click

    @Sumit1991
    Please post text output not screenshot. If long include in code tags. # on Advanced editor.

    If you cannot read backup super block that is not good. Was partition ext4? If some other Linux format then different tools would be required. Or was it encrypted?

    I have this in my notes.
    Last ditch redo superblocks:
    http://ubuntuforums.org/showthread.php?t=1681972&page=5
    Worked for this user:
    http://ubuntuforums.org/showthread.php?t=2033778
    http://ubuntuforums.org/showthread.php?t=1684746
    Some additional advanced ways:
    http://animeshdas.wordpress.com/2009...ad-superblock/
    http://www.hanksaves.com/hddrecovery..._Recovery_Wiki
    For more info on UEFI boot install & repair - Regularly Updated :
    http://ubuntuforums.org/showthread.php?t=2147295
    Please use Thread Tools above first post to change to [Solved] when/if answered completely.

  7. #1477
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    Re: [Boot-Repair] Graphical tool to repair the PC boot in one click

    @Oldfred: I will make sure to post text output from the next time. Yes the partition was ext4! And nopes, it wasnt encrypted! Any help just to recover my data in /home would be highly appreciated! Thanks

  8. #1478
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    Re: [Boot-Repair] Graphical tool to repair the PC boot in one click

    I might look at it with testdisk to see if it can see any data with deeper search.
    You may want to make an image copy so you can run photorec if necessary and the last ditch repairs linked to above further damage it.

    Full image backup
    GNU ddrescue (packaged as gddrescue, though once installed the command is "ddrescue")
    https://help.ubuntu.com/community/DataRecovery
    For more info on UEFI boot install & repair - Regularly Updated :
    http://ubuntuforums.org/showthread.php?t=2147295
    Please use Thread Tools above first post to change to [Solved] when/if answered completely.

  9. #1479
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    Re: [Boot-Repair] Graphical tool to repair the PC boot in one click

    Hi Guys,

    Another beggar looking for help. The pastebin is: http://paste.ubuntu.com/622031

    I have ubuntu 12.04. Wanted to install Windows 7 on another drive. After install Windows booted up fine. Used boot-repair and ran the recommended fix. After that I can boot into ubuntu. When I try to boot into windows it says : 'not such device. File not found'.

    If I again use boot-repair and revert to backup then I can boot in windows but not into linux. I'm using a Gigabyte X79-UD3 motherboard which uses UEFI but not secure boot ( AFAIK ). BIOS version F9.

    I will appreciate any help you can provide.

    Thanks

  10. #1480
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    Re: [Boot-Repair] Graphical tool to repair the PC boot in one click

    @saraswat40
    Posted pastebin does not work, missing one digit? We need to see that to know what is where.
    Are both Ubuntu & Windows in UEFI mode? Windows 7 has to be copied to a flash drive and reconfigured to work as UEFI installer otherwise it is just BIOS.
    You really need both systems in same boot mode. But you may be able to boot Windows from UEFI/BIOS by turning off UEFI and boot Ubuntu from UEFI/BIOS by turning on UEFI?
    BootInfo report will confirm.
    For more info on UEFI boot install & repair - Regularly Updated :
    http://ubuntuforums.org/showthread.php?t=2147295
    Please use Thread Tools above first post to change to [Solved] when/if answered completely.

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