Re: Booting more than 4 OSes from a hard disk?

2006-08-08 Thread backyard
Windows 2000+ can boot on an extended partition as can
linux, the BSDs, I think OS/2 warp+ can as well. So
you can still only have 4 primary partitions, but you
probably only need one that has a bootloader like GRUB
on it marked active and the OSs installed all on
extended partitions. I've even supprisingly confirmed
if GRUB is installed windows won't install it's own
bootloader. At least with Win2000sp4 this was the case
the one time I tried...

I would use GRUB cause its simple, fits on a floppy
and is easy to install from that booting floppy. It
shouldn't require any special booting options other
then boot from harddrive. 

I would guess BSD doesn't care where it boots from in
terms of sectors on the HD, but making a bootloader do
this is something I wouldn't be able to answer.
Although I know Grub allows you to chainload an
arbritary number of sectors from the bootsector so I
would look into that for exotic boots as you allude
too.

-brian

--- Girish Venkatachalam [EMAIL PROTECTED] wrote:

 Dear all,
 
 I was wondering if the 4 primary parition booting
 limit still exists. Is it possible to have 
 
 Windoze
 Linux
 FreeBSD
 OpenBSD
 NetBSD
 
 on the same box in such a way that we can boot into
 any of them?
 
 I am particularly interested in the x86 arch with
 IDE
 disks. I think this is possible on other archs with
 SCSI.
 
 What boot manager am I supposed to use? Does it
 require setting something on the BIOS? Does FreeBSD
 support booting from a point way off the first
 sector?
 
 Thanks.
 
 regards,
 Girish
 
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Re: Booting more than 4 OSes from a hard disk?

2006-08-08 Thread Derek Ragona
Master boot records are limited to four which is where the limit comes 
from.  It is theoretically possible to have the MBR point to a new disk 
location where you could have a boot manager that supports unlimited boot 
partitions.  But that requires all the booting is in software and outside 
the BIOS.


A simple solution is to use 2 disks.  Each with four partitions.  The 
FreeBSD bootmanager will offer to boot from disk2.  On disk 2 you can have 
your remaining OS's.


-Derek


At 10:40 AM 8/8/2006, Girish Venkatachalam wrote:

Dear all,

I was wondering if the 4 primary parition booting
limit still exists. Is it possible to have

Windoze
Linux
FreeBSD
OpenBSD
NetBSD

on the same box in such a way that we can boot into
any of them?

I am particularly interested in the x86 arch with IDE
disks. I think this is possible on other archs with
SCSI.

What boot manager am I supposed to use? Does it
require setting something on the BIOS? Does FreeBSD
support booting from a point way off the first sector?

Thanks.

regards,
Girish

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Re: Booting more than 4 OSes from a hard disk?

2006-08-08 Thread Mark Cullen

Girish Venkatachalam wrote:

Dear all,

I was wondering if the 4 primary parition booting
limit still exists. Is it possible to have 


Windoze
Linux
FreeBSD
OpenBSD
NetBSD

on the same box in such a way that we can boot into
any of them?

I am particularly interested in the x86 arch with IDE
disks. I think this is possible on other archs with
SCSI.

What boot manager am I supposed to use? Does it
require setting something on the BIOS? Does FreeBSD
support booting from a point way off the first sector?

Thanks.

regards,
Girish

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I *think* GAG can do this, though I have never actually personally tried 
it. If I ever use a boot loader though, GAG is my first choice. It's 
incredibly simple to install and configure.


http://gag.sourceforge.net/

--
Mark Cullen [EMAIL PROTECTED]
BSc (Hons), Computer Science
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