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Old 10-21-2015, 09:50 AM   #1
Kalle.suomi1337
LQ Newbie
 
Registered: Oct 2015
Posts: 2

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Unable to dualboot Debian 8.2 after installation


I'm trying to setup a dual boot with Windows and Debian on the same hard drive but can't figure out how I'm supposed to configure the boot manager(s). As windows boots natively from a virtual hard disk and needs to run hyper-v it's boot loader must be in the master boot record, so far everything seems ok but when I'm about to include Debian into this setup it either overwrite the master boot record (Debian boots but I can't boot windows) or the windows boot loader points out the Debian boat loader, assuming it's installed on the same partition as Debian was installed, (works fine on other distros like Ubuntu based systems). Although in Debian this setup fails to boot and I end up in "grub4dos".

Any ideas how I can make this setup work? I'm using Easybcd 2.2 on the windows side (mbr) which should be able to redirect to grub in order to boot Debian. Anything special I should consider during installation?
 
Old 10-21-2015, 04:46 PM   #2
John VV
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Registered: Aug 2005
Location: A2 area Mi.
Posts: 17,107

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easybcd was never needed 10 years ago and still is not
And will CAUSE problems

microsoft( win7 at least ) REQUIRES !!! that the microsoft bootloader be on the MBR on the FIRST DRIVE
updats will not even bother to check and will not even bother to error if windows can not wriute to the mbr

this is a royal bloody mess that Microsoft created


but as playing tic-tac-toe against the "WOPPER"
the only way to win is to NOT play


install grub on the first LINUX partition
and set the computer to boot from there as DEFAULT


grub and the linux installer will AUTO detect windows and auto add a entry for you ( if you want)
 
Old 10-24-2015, 01:41 AM   #3
Kalle.suomi1337
LQ Newbie
 
Registered: Oct 2015
Posts: 2

Original Poster
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Thanks, but that's pretty much a standard answer putting all focus on rage at windows without suggesting any useful solution for this specific case. Although it does work if I just wanted to boot some regular windows installation in any partition, this is a virtual disk and it needs some special command line arguments upon boot which doesn't seem possible to do in grub, if it did I would happily use grub. Installing anything Ubuntu based in a second partition after windows without overwriting mbr works perfectly the way I described above but in Debian based systems it fails, I really prefer Debian over Ubuntu.

Seeing it from another view, is there any way to virtualize both Windows and Linux machines and boot them all natively from virtual disk files of any format on any type of file system as well as inside each other using a hyper-visor like hyper-v, kvm, xen or similar?

Last edited by Kalle.suomi1337; 10-24-2015 at 01:13 PM. Reason: Extended question and information
 
  


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