Talk:Dual Booting - Revision history

Gefshep: /* Grub 2 */

2013-01-16T04:51:10Z

‎Grub 2

Gefshep: /* Grub 2 */

2013-01-16T04:49:54Z

‎Grub 2

Hoopes: /* Grub 2 */ new section

2013-01-02T01:42:08Z

‎Grub 2: new section

Tigersharke: /* boot0cfg */

2012-02-24T21:14:07Z

‎boot0cfg

Tigersharke at 21:13, 24 February 2012

2012-02-24T21:13:54Z

Tigersharke: /* boot0cfg */

2012-02-24T19:48:22Z

‎boot0cfg

Tigersharke at 19:47, 24 February 2012

2012-02-24T19:47:39Z

Tigersharke: boot0cfg

2012-02-24T19:46:44Z

boot0cfg

Karlgrose: mods to boot loader discussion

2011-10-22T09:37:44Z

mods to boot loader discussion

New page

The option to install a boot loader during PC-BSD installation is no longer present in the GUI, hence the mods to the discussion around recovering from "accidental use" of that previously available option.

@@ Line 52: / Line 52: @@
 The entry I eventually found was for me (after piecing things together) was:
-menuentry "PC-BSD 9.1" {
+     menuentry "PC-BSD 9.1" {
-set root='(hd0,2)'
+     set root='(hd0,2)'
-chainloader +1
+     chainloader +1
 "hd0,2"  -

← Older revision		Revision as of 04:49, 16 January 2013
Line 21:		Line 21:
	chainloader +1<br />		chainloader +1<br />
	}</code><br />		}</code><br />
		+
		+
		+	------------------------------------------
		+	I have just gone through the pain of configuring a dual boot using Grub2 for PC-BSD 9.1. FWIW, here is my experience.
		+
		+	'''Computer HDD Setup'''
		+
		+	I have Debian Linux (wheezy) on the first primary partition, with PC-BSD on the second primary partition using the zfs filesystem. When I installed PC-BSD, I installed its bootloader which overwrote Grub2 on the MBR.
		+
		+	'''Recovering Debian Grub2'''
		+
		+	To re-install Grub2 on the MBR in a Debian system, the installation cd/dvd have the tools specifically built in. Google on the Debian Wiki and it directs you to the appropriate section of the Debian installation guide.
		+
		+	Boot using the Debian Install Disk
		+	Advanced Options
		+	Recovery Mode
		+	You will progress through various screens which are the first part of the Debian Installer - don't worry too much because none of the info will be written to the disk. Eventually ....
		+	A screen will present the available partitions - select the one you want to be the root partition.
		+	Select the menu entry to re-install Grub
		+
		+
		+	'''Manual Menu Entries in Debian Grub2'''
		+
		+	Debian automatically builds the Grub2 config file " /boot/grub/grub.cfg" . There is no point editing it (and they warn you about this - it is a text file that you can read) because it is over-written the next time grub.cfg is created. Instead, if you look at the end of the file, you will see that they point you to a customisation file " /etc/grub.d/40_custom " . Open it in an editor (as superuser) and you can add your manual entries to the bottom. Save the file and then once again as superuser:
		+	" update-grub "
		+	This will incorporate your custimisations in a new grub.cfg file.
		+
		+	'''Adding PC-BSD to Grub2'''
		+
		+	The entry I eventually found was for me (after piecing things together) was:
		+
		+	menuentry "PC-BSD 9.1" {
		+	set root='(hd0,2)'
		+	chainloader +1
		+
		+	"hd0,2" -
		+
		+	0 stands for the first hard disk, because you count your disks from zero.
		+	2 stands for the second partition because you count your partitions from one.
		+
		+	chainloader +1 allows grub to go to the bootloader for PC-BSD which I installed initially if you remember and which is loaded at the start of the PC-BSD partition.
		+
		+	Finally, to change the timeout and default menu entries, I've written previously about this here:
		+	http://glassfloor.blogspot.com.au/search/label/Grub

← Older revision		Revision as of 01:42, 2 January 2013
Line 9:		Line 9:
	From commandline:		From commandline:
	boot0cfg -B ada0		boot0cfg -B ada0
		+
		+	== Grub 2 ==
		+
		+	I noticed the section on Grub 2 is a little out of date. The map command is a legacy command. In Grub 2, it was renamed to drivemap. Also, the device names changed slightly in Grub 2: the partitions of the hard drive are counted from '''1''' instead of 0: so, (hd0,msdos1) is the first partition of the first hard drive.
		+
		+	drivemap isn't actually needed to boot PC-BSD if it's on the second disk, at least for me. My menuentry is something like this:
		+
		+	<code>menuentry "PC-BSD 9.1" {<br />
		+	insmod ufs2<br />
		+	set root=(hd1,msdos1)<br />
		+	chainloader +1<br />
		+	}</code><br />

@@ Line 6: / Line 6: @@
 * [http://www.freebsd.org/cgi/man.cgi?query=boot0cfg http://www.freebsd.org/cgi/man.cgi?query=boot0cfg]
 * [http://www.freebsd.org/doc/en/books/handbook/boot.html http://www.freebsd.org/doc/en/books/handbook/boot.html]
-* [http://forums.freebsd.org/showthread.php?t=29099]
+* [http://forums.freebsd.org/showthread.php?t=29099 http://forums.freebsd.org/showthread.php?t=29099]
 From commandline:
   boot0cfg -B ada0

@@ Line 6: / Line 6: @@
 * [http://www.freebsd.org/cgi/man.cgi?query=boot0cfg http://www.freebsd.org/cgi/man.cgi?query=boot0cfg]
 * [http://www.freebsd.org/doc/en/books/handbook/boot.html http://www.freebsd.org/doc/en/books/handbook/boot.html]
 From commandline:
   boot0cfg -B ada0

← Older revision		Revision as of 19:46, 24 February 2012
Line 1:		Line 1:
	The option to install a boot loader during PC-BSD installation is no longer present in the GUI, hence the mods to the discussion around recovering from "accidental use" of that previously available option.		The option to install a boot loader during PC-BSD installation is no longer present in the GUI, hence the mods to the discussion around recovering from "accidental use" of that previously available option.
		+	----
		+	Unsure exactly how/where to fit this in:
		+
		+	boot0cfg
		+	http://www.freebsd.org/cgi/man.cgi?query=boot0cfg
		+	http://www.freebsd.org/doc/en/books/handbook/boot.html
		+	From commandline:
		+	boot0cfg -B ada0