Dual Boot Problem - Mountain Lion / Lion

I recently tried to setup a dual boot between Lion and Mountain Lion. I have them both existing on seperate internal hard drives. I can boot into each other just fine by selecting them from "Startup Disk" under system preferences. However, I cannot boot into them by holding down the option key at startup. When I hold down the option key at startup I just get a grey screen that hangs there. No options appear. It just freezes.
Any ideas on what I can do to make this work? Both operating systems are installed, working, and bootable. I'd just love to be able to have the option to choose which one to boot into at startup.
Thanks!
I should also add that I have tried zapping the PRAM as well.

I have some new information on the problem. Alternative boot options do appear after holding down the option key, but it takes a solid minute and half for them to appear. I guess I was not waiting long enough. Any reason as to why it is hanging for a 1 1/2 minutes before displaying the boot options?

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Hi
I want to create a dual boot drive for Mountain Lion and Snow Leopard as some of my hardware (is not supported in Mountain Lion).
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My plan was to do a clean install of both using two partitions, the larger going to ML and smaller one for SL. I was going to install SL from the DVD and then after updating from 10.6. to 10.6.8 and download ML from the app store and install on the larger partition.
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Thanks mende1
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Thanks again
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Not sure if you ever got help with this but I would first make sure you have at least 4GB of RAM and then perform a clean install of 10.8 or 10.9. I have never been a fan of OS upgrades. Especially from 10.6 to 10.8/10.9 since the OSs are drastically different.

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With Mountain Lion on the External, how does that creat a Dual Boot capability?
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Hi,
Please using the command below to fix system boot loader for test.
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Type bcdboot x:\windows, press Enter.
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TechNet Community Support

Dual Boot Problem in G580

Two days before i have got this model Lenovo G580(20157) with i5 processor and nvidia 610m graphic card...
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2.I restarted my laptop and inserted ubuntu 12.04 64 bit cd
3.Ubuntu installation setup started and in that it was showing that there is no operating system preinstalled on this machine.......it was showing that my complete hard drive is blank......but when i removed my ubuntu cd without installing it and restarted the computer windows 8 was working fine...
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Hello and welcome,
Try Ubuntu 12.10 64 bit or later.
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The large print: please read the Community Participation Rules before posting. Include as much information as possible: model, machine type, operating system, and a descriptive subject line. Do not include personal information: serial number, telephone number, email address, etc. The fine print: I do not work for, nor do I speak for Lenovo. Unsolicited private messages will be ignored. ... GeezBlog
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Ethernet dual-boot problem

My new onboard ethernet - Realtek PHY RTL8201CL on an ASRock K8NF4G-SATA2 board - seems to have a strange problem with dual-booting. After I've booted Windows XP it refuses to work in linux. My system hangs for a time during bootup at "Network" and finally moves on after network has registered as failed.
The only solution seems to be to turn-off the computer and truly power it down (unplug it). Once I've done that everything seems to work again without any trouble. I believe it must be the ethernet since this didn't happen with my old computer using exactly the same ethernet ADSL modem.
Since I don't use windows often it's not a big problem for me, but it is an annoyance. Does anyone know what might be causing this?

weird, not that related but i remember an issue with ati users where starting windows first was necessary to initialize the ati card; thus getting it to launch in linux...
maybe you can alleviate this by having some initialize down/up code in your startup code before 'network'.

Windows 7 and Arch linux dual boot problem

hey guys I had an issue with windows 7 dual booted with arch and i was just wondering my windows 7 crashed. I had Reinstalled windows OS and all my partitions are set up but now when I try to boot up arch I cant at all cause windows Boot took over and i have no way of getting into arch is there anyway i can fix this or maybe reinstall arch without loseing my home folder with all my data, or is there just and easyer way to fix this issue im stuck. thank you all for your support as i am a noob

You need to re-install grub. When you reinstalled Windows it will overwrite grub preventing you booting Arch. You'll need to boot from a liveCD and chroot into your Arch installation. details for recovering grub are in the wiki - https://wiki.archlinux.org/index.php/GR … stallation

Dual Boot Problem

I'm trying to dual boot widows xp and arch. I have everything setup except i cant get grub to start when i turn on the system. All it does is boot into xp. I've read the wiki and everything and it didn't help. Thanks

Belikeabox wrote:I installed grub to the mbr like you guys said and it fucked up. When i select windows xp in grub it just says loading stage 2 adn goes back to grub. I have my menu.lst all setup right also.
as stated please please display the out put of fdisk -l
that is at a command prompt as root type in fdisk -l it will display info like this
Device Boot Start End Blocks Id System
/dev/sda1 63 2008124 1004031 82 Linux swap / Solaris
/dev/sda2 2008125 58428404 28210140 83 Linux
/dev/sda3 58428405 89915804 15743700 83 Linux
/dev/sda4 89915805 145211534 27647865 5 Extended
/dev/sda5 89915868 145211534 27647833+ 83 Linux
Device Boot Start End Blocks Id System
/dev/sdb1 63 3907024064 1953512001 83 Linux
Device Boot Start End Blocks Id System
/dev/sdc1 * 63 35407259 17703598+ 7 HPFS/NTFS
/dev/sdc2 35407260 78172289 21382515 83 Linux
notice I have several drives only two have os's arch32-sata arch64-sata arch32-ide & xp-ide
on my system to boot off the ide drive I have to tell the bios to boot from it
on each drive it has its own grub & on each grub both say to boot arch it looks to /dev/sda2 you see when I tell my bios to boot the ide it then makes it the 1st drive. so in the initrd file I tell it to load modules for pata only this way arch sees it then as sda not sdc as it is label in my fdisk -l posted above
I hope you understood what all I put here. if your like I was when I first migrated to arch I said its english but it sure seemed a foreign language.
when/if you have multiple os's & partitions & drives it can be a pain
you say your following the wiki but are you absolutely positive xp is where you tell grub it is
cause if you tell grub xp is on sda1 & sda1 is a hidden partition that was setup at the factory & xp is actually on sda2 grub is not going to look at sda2 only at sda1 that you told grub xp is there
linux can be frustrating in the begining especially arch. I remember, but it has been a fun learning experience & still is.

[SOLVED]GRUB Dual-boot problem

Hey guys, I need some help since I haven't had any issues with GRUB until now. I've read the GRUB page on the wiki and several other sites, but I'm still not sure which method I should use.
Anyway, everything was fine yesterday, I could boot into both my Windows and Arch. Then for some reason today, I tried booting into Windows, but stated BOOTMGR is missing, press CTRL+ALT+DEL to restart. So I tried booting into Arch, which was fine. So I used the Windows CD and then used Startup Repair to fix Windows, but unfortunately it didn't work. I then typed bootrec /fixmbr (which was typed impulsively, since I use that whenever I uninstall Linux). Anyway, that makes Windows overwrite to the MBR, so after booting my laptop it goes straight to Windows.
So I was wondering whether to use the method where you have to use chroot, the method you can just use grub> find /grub/stage1 and install to MBR, or just run through the Arch install CD and skip everything except installing the bootloader and rebooting.
Replies are appreciated, thanks in advance.
EDIT: Solved it. I booted in the Arch Linux install CD and followed the instructions on the wiki. I switched to the grub shell and used
grub> find /grub/stage1
for use in root. It displayed (hd0,6), so I then used
grub> root (hd0,6)
. Lastly I used
grub> setup (hd0)
to install GRUB to the MBR. It works perfectly again.
Last edited by Reki (2011-11-27 14:31:23)

I know exactly what the problem is.
If you're using rEFIt, sync your partition tables (should be the menu item called 'Partitioning Tool'). The problem is that GRUB has been installed, but doesn't know where to find the Arch partition.
After syncing, you may find that the boot process hangs at the Linux logo on a gray background. No worries — just reboot and the problem should fix itself.
N.B. You will need to do a partition table sync every time you change your hard drive's layout.

[SOLVED]Dual boot problem with an Asus UX31A (EFI)

I never did an EFI install before and I still don't understand how it works however following the Zenbook wiki, I have successfully installed Arch. Now I can't boot Windows 7 anymore. I am using grub2, have installed os-prober. Grub menu has windows 7 entry but when used prompts a wrong EFI file path error.
My partition table is:
[root@zenbook sonay]# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 238.5G 0 disk
├─sda1 8:1 0 200M 0 disk
├─sda2 8:2 0 128M 0 disk
├─sda3 8:3 0 98.6G 0 disk
├─sda4 8:4 0 4G 0 disk
├─sda5 8:5 0 90.7G 0 disk
├─sda6 8:6 0 512M 0 disk /boot/efi
├─sda7 8:7 0 3.9G 0 disk
├─sda8 8:8 0 10G 0 disk
├─sda9 8:9 0 200M 0 disk /boot
└─sda10 8:10 0 30.3G 0 disk /
sdc 8:32 0 931.5G 0 disk
└─sdc1 8:33 0 931.5G 0 disk /run/media/sonay/My Passport
/dev/sda1 used to be Windows 7 EFI partition. Gparted says it is flagged as boot.
What I did to install arch:
Partitioned /dev/sda5 with windows disk manager to create linux partitions and formatted the new partitions with gparted as the noob I am.
created /dev/sda6 for EFI boot
created /dev/sda9 for boot partition
created /dev/sda10 as root.
Did not touch
/dev/sda1 which was the EFI partition named SYSTEM
/dev/sda2 which was windows boot partition
/dev/sda3 which was windows C:,
/dev/sda4 and /dev/sda7 which I don't know what they used to be (possible for Asus fast wake up or swap whatever)
/dev/sda8 which is recovery partition.
I did not touch any grub files, except /etc/default/grub
[sonay@zenbook ~]$ cat /etc/default/grub
GRUB_DEFAULT=0
GRUB_TIMEOUT=1
GRUB_DISTRIBUTOR="Arch"
GRUB_CMDLINE_LINUX_DEFAULT="quiet init=/bin/systemd add_efi_memmap elevator=noop i915.i915_enable_rc6=1 pcie_aspm=force drm.vblankoffdelay=1 i915.semaphores=1 nmi_watchdog=0"
GRUB_CMDLINE_LINUX=""
# Preload both GPT and MBR modules so that they are not missed
GRUB_PRELOAD_MODULES="part_gpt part_msdos"
# Uncomment to enable Hidden Menu, and optionally hide the timeout count
#GRUB_HIDDEN_TIMEOUT=5
#GRUB_HIDDEN_TIMEOUT_QUIET=true
# Uncomment to use basic console
GRUB_TERMINAL_INPUT=console
# Uncomment to disable graphical terminal
#GRUB_TERMINAL_OUTPUT=console
# The resolution used on graphical terminal
# note that you can use only modes which your graphic card supports via VBE
# you can see them in real GRUB with the command `vbeinfo'
GRUB_GFXMODE=auto
# Uncomment to allow the kernel use the same resolution used by grub
GRUB_GFXPAYLOAD_LINUX=keep
# Uncomment if you want GRUB to pass to the Linux kernel the old parameter
# format "root=/dev/xxx" instead of "root=/dev/disk/by-uuid/xxx"
#GRUB_DISABLE_LINUX_UUID=true
# Uncomment to disable generation of recovery mode menu entries
GRUB_DISABLE_RECOVERY=true
# Uncomment and set to the desired menu colors. Used by normal and wallpaper
# modes only. Entries specified as foreground/background.
#GRUB_COLOR_NORMAL="light-blue/black"
#GRUB_COLOR_HIGHLIGHT="light-cyan/blue"
# Uncomment one of them for the gfx desired, a image background or a gfxtheme
#GRUB_BACKGROUND="/path/to/wallpaper"
#GRUB_THEME="/path/to/gfxtheme"
# Uncomment to get a beep at GRUB start
#GRUB_INIT_TUNE="480 440 1"
#GRUB_SAVEDEFAULT="true"
Finally my /boot/grub/grub.cfg is:
[sonay@zenbook ~]$ cat /etc/default/grub
GRUB_DEFAULT=0
GRUB_TIMEOUT=1
GRUB_DISTRIBUTOR="Arch"
GRUB_CMDLINE_LINUX_DEFAULT="quiet init=/bin/systemd add_efi_memmap elevator=noop i915.i915_enable_rc6=1 pcie_aspm=force drm.vblankoffdelay=1 i915.semaphores=1 nmi_watchdog=0"
GRUB_CMDLINE_LINUX=""
# Preload both GPT and MBR modules so that they are not missed
GRUB_PRELOAD_MODULES="part_gpt part_msdos"
# Uncomment to enable Hidden Menu, and optionally hide the timeout count
#GRUB_HIDDEN_TIMEOUT=5
#GRUB_HIDDEN_TIMEOUT_QUIET=true
# Uncomment to use basic console
GRUB_TERMINAL_INPUT=console
# Uncomment to disable graphical terminal
#GRUB_TERMINAL_OUTPUT=console
# The resolution used on graphical terminal
# note that you can use only modes which your graphic card supports via VBE
# you can see them in real GRUB with the command `vbeinfo'
GRUB_GFXMODE=auto
# Uncomment to allow the kernel use the same resolution used by grub
GRUB_GFXPAYLOAD_LINUX=keep
# Uncomment if you want GRUB to pass to the Linux kernel the old parameter
# format "root=/dev/xxx" instead of "root=/dev/disk/by-uuid/xxx"
#GRUB_DISABLE_LINUX_UUID=true
# Uncomment to disable generation of recovery mode menu entries
GRUB_DISABLE_RECOVERY=true
# Uncomment and set to the desired menu colors. Used by normal and wallpaper
# modes only. Entries specified as foreground/background.
#GRUB_COLOR_NORMAL="light-blue/black"
#GRUB_COLOR_HIGHLIGHT="light-cyan/blue"
# Uncomment one of them for the gfx desired, a image background or a gfxtheme
#GRUB_BACKGROUND="/path/to/wallpaper"
#GRUB_THEME="/path/to/gfxtheme"
# Uncomment to get a beep at GRUB start
#GRUB_INIT_TUNE="480 440 1"
#GRUB_SAVEDEFAULT="true"
[sonay@zenbook ~]$ cat /boot/grub/grub.cfg
cat: /boot/grub/grub.cfg: Permission denied
[sonay@zenbook ~]$ su
Password:
[root@zenbook sonay]# cat /boot/grub/grub.cfg
# DO NOT EDIT THIS FILE
# It is automatically generated by grub-mkconfig using templates
# from /etc/grub.d and settings from /etc/default/grub
### BEGIN /etc/grub.d/00_header ###
insmod part_gpt
insmod part_msdos
if [ -s $prefix/grubenv ]; then
load_env
fi
set default="0"
if [ x"${feature_menuentry_id}" = xy ]; then
menuentry_id_option="--id"
else
menuentry_id_option=""
fi
export menuentry_id_option
if [ "${prev_saved_entry}" ]; then
set saved_entry="${prev_saved_entry}"
save_env saved_entry
set prev_saved_entry=
save_env prev_saved_entry
set boot_once=true
fi
function savedefault {
if [ -z "${boot_once}" ]; then
saved_entry="${chosen}"
save_env saved_entry
fi
function load_video {
if [ x$feature_all_video_module = xy ]; then
insmod all_video
else
insmod efi_gop
insmod efi_uga
insmod ieee1275_fb
insmod vbe
insmod vga
insmod video_bochs
insmod video_cirrus
fi
if [ x$feature_default_font_path = xy ] ; then
font=unicode
else
insmod part_gpt
insmod ext2
set root='hd0,gpt10'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt10 --hint-efi=hd0,gpt10 --hint-baremetal=ahci0,gpt10 cf66f05a-418c-4517-a0e0-af01b3be4a67
else
search --no-floppy --fs-uuid --set=root cf66f05a-418c-4517-a0e0-af01b3be4a67
fi
font="/usr/share/grub/unicode.pf2"
fi
if loadfont $font ; then
set gfxmode=auto
load_video
insmod gfxterm
set locale_dir=$prefix/locale
set lang=en_US
insmod gettext
fi
terminal_input console
terminal_output gfxterm
set timeout=1
### END /etc/grub.d/00_header ###
### BEGIN /etc/grub.d/10_linux ###
menuentry 'Arch GNU/Linux, with Linux core repo kernel' --class arch --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-core repo kernel-true-cf66f05a-418c-4517-a0e0-af01b3be4a67' {
load_video
set gfxpayload=keep
insmod gzio
insmod part_gpt
insmod ext2
set root='hd0,gpt9'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt9 --hint-efi=hd0,gpt9 --hint-baremetal=ahci0,gpt9 42d2ba69-758d-4a54-9482-ae5d60866a52
else
search --no-floppy --fs-uuid --set=root 42d2ba69-758d-4a54-9482-ae5d60866a52
fi
echo 'Loading Linux core repo kernel ...'
linux /vmlinuz-linux root=UUID=cf66f05a-418c-4517-a0e0-af01b3be4a67 ro quiet init=/bin/systemd add_efi_memmap elevator=noop i915.i915_enable_rc6=1 pcie_aspm=force drm.vblankoffdelay=1 i915.semaphores=1 nmi_watchdog=0
echo 'Loading initial ramdisk ...'
initrd /initramfs-linux.img
menuentry 'Arch GNU/Linux, with Linux core repo kernel (Fallback initramfs)' --class arch --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-core repo kernel-fallback-cf66f05a-418c-4517-a0e0-af01b3be4a67' {
load_video
set gfxpayload=keep
insmod gzio
insmod part_gpt
insmod ext2
set root='hd0,gpt9'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt9 --hint-efi=hd0,gpt9 --hint-baremetal=ahci0,gpt9 42d2ba69-758d-4a54-9482-ae5d60866a52
else
search --no-floppy --fs-uuid --set=root 42d2ba69-758d-4a54-9482-ae5d60866a52
fi
echo 'Loading Linux core repo kernel ...'
linux /vmlinuz-linux root=UUID=cf66f05a-418c-4517-a0e0-af01b3be4a67 ro quiet init=/bin/systemd add_efi_memmap elevator=noop i915.i915_enable_rc6=1 pcie_aspm=force drm.vblankoffdelay=1 i915.semaphores=1 nmi_watchdog=0
echo 'Loading initial ramdisk ...'
initrd /initramfs-linux-fallback.img
### END /etc/grub.d/10_linux ###
### BEGIN /etc/grub.d/20_linux_xen ###
### END /etc/grub.d/20_linux_xen ###
### BEGIN /etc/grub.d/20_memtest86+ ###
### END /etc/grub.d/20_memtest86+ ###
### BEGIN /etc/grub.d/30_os-prober ###
menuentry 'Windows 7 (loader) (on /dev/sda3)' --class windows --class os $menuentry_id_option 'osprober-chain-5246C0D846C0BE4B' {
insmod part_gpt
insmod ntfs
set root='hd0,gpt3'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt3 --hint-efi=hd0,gpt3 --hint-baremetal=ahci0,gpt3 5246C0D846C0BE4B
else
search --no-floppy --fs-uuid --set=root 5246C0D846C0BE4B
fi
chainloader +1
menuentry 'Windows Recovery Environment (loader) (on /dev/sda8)' --class windows --class os $menuentry_id_option 'osprober-chain-3C98C9B298C96B4A' {
insmod part_gpt
insmod ntfs
set root='hd0,gpt8'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt8 --hint-efi=hd0,gpt8 --hint-baremetal=ahci0,gpt8 3C98C9B298C96B4A
else
search --no-floppy --fs-uuid --set=root 3C98C9B298C96B4A
fi
drivemap -s (hd0) ${root}
chainloader +1
### END /etc/grub.d/30_os-prober ###
### BEGIN /etc/grub.d/40_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.
### END /etc/grub.d/40_custom ###
### BEGIN /etc/grub.d/41_custom ###
if [ -f ${config_directory}/custom.cfg ]; then
source ${config_directory}/custom.cfg
elif [ -z "${config_directory}" -a -f $prefix/custom.cfg ]; then
source $prefix/custom.cfg;
fi
### END /etc/grub.d/41_custom ###
SOLUTION:
first I needed to mount Windows EFI partition which was /dev/sda1, so :
mount /dev/sda1 /mnt
Then issue the following commands and take note of the outputs:
grub-probe --target=fs_uuid /mnt/EFI/Microsoft/Boot/bootmgfw.efi
which outputs: 18DF-E58E and
grub-probe --target=hints_string /mnt/EFI/Microsoft/Boot/bootmgfw.efi
which outputs: --hint-bios=hd0,gpt1 --hint-efi=hd0,gpt1 --hint-baremetal=ahci0,gpt1
Finally edit the os-prober entry to the following in /boot/grub/grub.cfg
menuentry 'Windows 7 (loader) (on /dev/sda3)' --class windows --class os $menuentry_id_option 'osprober-chain-5246C0D846C0BE4B' {
insmod part_gpt
insmod fat
insmod search_fs_uuid
insmod chain
search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt1 --hint-efi=hd0,gpt1 --hint-baremetal=ahci0,gpt1 18DF-E58E
chainloader /EFI/Microsoft/Boot/bootmgfw.efi
Last edited by sonay (2012-10-07 18:20:20)

grub-probe --target=hints_string /boot/efi/EFI/Microsoft/Boot/bootmgfw.efi
--hint-bios=hd0,gpt1 --hint-efi=hd0,gpt1 --hint-baremetal=ahci0,gpt1
Sorry, no need to anymore. Thanks anyways.
Last edited by sonay (2012-10-07 18:08:39)

Dual boot problems 10.3.9 and 10.4.6

I have a power mac G5 with 2 internal hard drives. The primary drive is running 10.3.9. I just installed 10.4.6 on the secondary hard drive. Ever since, the computer boots from the secondary drive and the primary hard drive will not mount. it won't come up as a startup disk in the system preferences, it only appears in the system profiler and disk utility. in system profiler, the partition is greyed out. in the disk utility, disk repair reports an error: invalid b-tree node size, which it is not able to fix. (read on as the drive atually works). when i disconnect the secondary drive, the primary drive running 10.3.9 boots and runs. i swapped the drives, moving the secondary as the primary. no change. i need to keep both systems running until i can update all my software. why is it that whatever both drives are connected only the drive running tiger ounts? any help? thanks!
power mac g5 Mac OS X (10.4.6)

try booting up from your installer dvd, and choose startup disk from off the cd - see if they both show up.

NI PXI 8108 Controller Dual Boot Problem

Hello Friends
Good Evening.I am using NI PXI 8108 Embedded Controller.I need to Install both the OS Windows XP and LabVIEW RT .First I make the two Partition in the PXI Controller.One Partition i installed the Windows XP and Another Partition I make it as free.I dont know how to install the LabVIEW RT OS in the Another Partition.
Can you Please anyone suggest your idea.
Thanks
Jayavel SM

Hello Jayavel,
Try the following link: http://digital.ni.com/public.nsf/allkb/227CF36870DB7BDB86256F790057F20F

How do I dual boot Mountain Lion

I recenetly purchased a new iMac with Mountain Lion installed on it. My previous Mac runs Lion. I still have a few apps which I need to support older devices for and need to run an earlier version of xCode than is allowed on Mountain Lion. My hope was to setup a dual boot system with both Lion and Mountain Lion to do this. So far I have not been able to figure this out. I've tried to follow walkthroughs on the web, but they were all had Lion and were making a Mountain Lion partition. Any input would be much appreciated.
Thanks,
Scott

Yep. Your new machine can only be started with the version of Mountain Lion with which it came.
There isn't much you can do. If you wish to spend money you can purchase Parallels 8 for OS X and try running Lion or Snow Leopard in emulation. See Running Lion as a Guest OS in Parallels Desktop 7 - YouTube.

Dual Boot Problem - Mountain Lion / Lion

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