[ubuntu-us-mi] ubuntu 12.10 dual boot issue

Discussion:

Brian Brodsky

2012-11-16 01:10:38 UTC

I decided to try the new Ubuntu 12.10 on my laptop. I had an old version
of Ubuntu installed in a separate partition that I had setup as a dual
boot with Windows 7, which worked fine. After I upgraded and was only
able to boot Ubuntu. When I tried to boot to windows I got the following
error: A disk read error occurred Press Ctrl+Alt+Del to restart. I then
fixed the windows boot-up as described on this page
https://help.ubuntu.com/community/RestoreUbuntu/XP/Vista/7Bootloader. I
downloaded the 64 bit windows recovery disk and ran bootrec /fixboot and
bootrec /fixmbr. This fixed my windows but grub no longer booted. I then
ran boot-repair as described on this page
http://askubuntu.com/questions/187862/after-update-get-error-file-not-found-followed-by-grub-rescue.
This got grub and Ubuntu back but my original problem of not being able
to boot to windows was back. After fixing windows I am able to boot to
ubuntu by booting off a super grub cd. I apparantly am not the only one
with this problem:
http://askubuntu.com/questions/203529/windows-7-not-loading-after-installing-ubuntu-12-10
and
http://askubuntu.com/questions/203529/windows-7-not-loading-after-installing-ubuntu-12-10.
Does anybody have any suggestions on what I can do to create a dual boot
system with windows 7 and ubuntu 12.10?

Thank you in advance,

Brian

Jeff Hanson

2012-11-16 01:22:35 UTC

Permalink

If you think that is difficult then don't try a dual-boot on a non-EFI
system with Ubuntu 12.04 (Precise Pangolin) and Win7 both on software
RAID. Win7 requires Dynamic Volumes for software RAID and repartitions the
drive as GPT instead of MS-DOS. I ended up with a MS-DOS partition layout
with Win7 non-RAID and Ubuntu using software RAID. I'm not sure why that
even worked.

On Thu, Nov 15, 2012 at 8:10 PM, Brian Brodsky

Post by Brian Brodsky
I decided to try the new Ubuntu 12.10 on my laptop. I had an old version
of Ubuntu installed in a separate partition that I had setup as a dual boot
with Windows 7, which worked fine. After I upgraded and was only able to
boot Ubuntu. When I tried to boot to windows I got the following error: A
disk read error occurred Press Ctrl+Alt+Del to restart. I then fixed the
windows boot-up as described on this page https://help.ubuntu.com/**
community/RestoreUbuntu/XP/**Vista/7Bootloader<https://help.ubuntu.com/community/RestoreUbuntu/XP/Vista/7Bootloader>.
I downloaded the 64 bit windows recovery disk and ran bootrec /fixboot and
bootrec /fixmbr. This fixed my windows but grub no longer booted. I then
ran boot-repair as described on this page http://askubuntu.com/**
questions/187862/after-update-**get-error-file-not-found-**
followed-by-grub-rescue<http://askubuntu.com/questions/187862/after-update-get-error-file-not-found-followed-by-grub-rescue>.
This got grub and Ubuntu back but my original problem of not being able to
boot to windows was back. After fixing windows I am able to boot to ubuntu
by booting off a super grub cd. I apparantly am not the only one with this
problem: http://askubuntu.com/**questions/203529/windows-7-**
not-loading-after-installing-**ubuntu-12-10<http://askubuntu.com/questions/203529/windows-7-not-loading-after-installing-ubuntu-12-10>and
http://askubuntu.com/**questions/203529/windows-7-**
not-loading-after-installing-**ubuntu-12-10<http://askubuntu.com/questions/203529/windows-7-not-loading-after-installing-ubuntu-12-10>.
Does anybody have any suggestions on what I can do to create a dual boot
system with windows 7 and ubuntu 12.10?
Thank you in advance,
Brian
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Brian Brodsky

2012-11-16 01:33:48 UTC

Permalink

Sorry, the second example link of someone with my problem is
http://askubuntu.com/questions/216800/a-disk-read-error-occured-press-ctrlaltdel-to-restart.

Brian

Brian Brodsky

2012-11-18 22:55:36 UTC

Permalink

My problem is now resolved. It appears that either grub2, or the way
Ubuntu implemented grub2, does not detect Windows partitions properly. I
had a co-worker help me with this. First get grub working. Then I added
the code below in /etc/grub.d/08_custom. Then update-grub. This puts
windows above Ubuntu so it will boot by default. If you wish to boot
Ubuntu by default, modify 40_custom instead. This will create a new enty
for windoes along with the useless entry that was originally found.
Select the custom entry to boot weindows, My new grub.cfg is at
http://paste.ubuntu.com/1368590/. Here is the contents of my 08_custom:

# This file provides an easy way to add custom menu entries. Simply type the
# menu entries you want to add after this comment. Be careful not to change
# the 'exec tail' line above.
menuentry 'Windows 7 (customized entry)' {
insmod part_msdos
insmod ntfs
set root='(hd0,msdos1)'
chainloader +1
}

Post by Brian Brodsky
Sorry, the second example link of someone with my problem is
http://askubuntu.com/questions/216800/a-disk-read-error-occured-press-ctrlaltdel-to-restart.
Brian