Results 1 to 5 of 5

Thread: During an installation typed sudo dmraid -E -r /dev/sda, now windows 8 cannot start

  1. #1
    Join Date
    Mar 2013
    Beans
    2

    During an installation typed sudo dmraid -E -r /dev/sda, now windows 8 cannot start

    During my installation of ubuntu from a usb drive it couldn't detect my hard drive. I researched and learned that it I deleted my raid(or whatever sudo dmraid -E -r /dev/sda does) then ubuntu would detect the hard drive. It worked! However, when I try to start windows 8 I get a message at startup saying that one of my drives (raid0) is disabled and then windows 8 crashes. Windows 8 tried to fix the problem but it couldn't. Is there anything I can do to fix this?

  2. #2
    Join Date
    Mar 2013
    Beans
    2

    During an installation typed sudo dmraid -E -r /dev/sda, now windows 8 cannot start

    During my installation of ubuntu from a usb drive it couldn't detect my hard drive. I researched and learned that it I deleted my raid(or whatever sudo dmraid -E -r /dev/sda does) then ubuntu would detect the hard drive. It worked! However, when I try to start windows 8 I get a message at startup saying that one of my drives (raid0) is disabled and then windows 8 crashes. Windows 8 tried to fix the problem but it couldn't. Is there anything I can do to fix this?

  3. #3
    Join Date
    Jun 2009
    Location
    SW Forida
    Beans
    Hidden!
    Distro
    Ubuntu 16.04 Xenial Xerus

    Re: During an installation typed sudo dmraid -E -r /dev/sda, now windows 8 cannot sta

    Someone posted this on reinabling. Did you turn off the auto hibernating and fast boot in Windows and UEFI?

    Some info on re-instating details in post #9
    http://ubuntuforums.org/showthread.php?t=2038121
    http://ubuntuforums.org/showthread.php?t=2070491


    WARNING for Windows 8 Dual-Booters
    http://ubuntuforums.org/showthread.php?t=1953674
    It defaults shutdown to a hybrid hibernation/off state for fast boot
    http://www.kapilarya.com/how-to-enab...p-in-windows-8
    But then files may be corrupted similar to Windows 7 Hibernation:
    http://ubuntu-with-wubi.blogspot.ca/...rid-sleep.html
    http://superuser.com/questions/14472...te-w-dual-boot
    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. #4
    Join Date
    Jul 2008
    Location
    Maryland
    Beans
    1,537
    Distro
    Ubuntu 12.10 Quantal Quetzal

    Re: During an installation typed sudo dmraid -E -r /dev/sda, now windows 8 cannot sta

    The way a raid0 works is by having a raid bios on the MB use two disks as one by writing alternate sectors on each of the drive. This speeds up data reads and writes but distributed data between the drives such that the integrity of that setup has to be maintained or the data is essentially lost. When you break the raid0 and write to one disk only you overwrite one continuous sector of one disk so that the original data written to the disk under raid0, let alone the partition tables are no longer intact. After breaking the raid and installing Ubuntu to one drive I doubt the original raid set is recoverable!

    Your best options probably are:
    1) To keep the drives separate as a non-raid and completely re-install Win8 and Ubuntu side by side.
    2) Reformat the drives and initiate the raid bios (thus restoring the raid0 metadata). And then completely reinstalling both OS on the raid.

    I doubt that any data recovery is at all promising since we don't know which has been overwritten and is recoverable at all. If you had data in a separate partition from windows it might be recoverable if valuable enough for expending great effort (maybe sector by sector recovery fro sound raid0 sectors). Unfortunately raid systems are very dangerous to any one who doesn't fully understand how they work and how they can be used - I speak with firsthand experience of my own disasters. Good luck to you.
    12.10 Quantal w/grub2/Mint13 installed on raid0, Gigabyte AMD MB, AMD 64x4 CPUs at 3.2GHz, 16 GB ram, HD7770 ATI video, dual boot win7 on 64gb ssd and win8 on 1Tb SATA raid. 13.04 installed on raid0 and ssd

  5. #5
    Join Date
    Jun 2009
    Location
    SW Forida
    Beans
    Hidden!
    Distro
    Ubuntu 16.04 Xenial Xerus

    Re: During an installation typed sudo dmraid -E -r /dev/sda, now windows 8 cannot sta

    Please do not create duplicate threads. We need to know what others have already replied to not duplicate effort.
    We all are volunteers.
    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.

Tags for this Thread

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •