[ale] Booting a Win XP drive with grub without reinstalling?

[Jonathan Glass]

Forgot to add:
partition. Thus, if you have installed DOS (or Windows) on the first
and the second partition of the first hard disk, and you want to boot
the copy on the first partition, do the following:

     grub> unhide (hd0,0)
     grub> hide (hd0,1)
     grub> rootnoverify (hd0,0)
     grub> chainloader +1
     grub> makeactive
     grub> boot



>> Guys,
>>
>> I have two machines...one with Windows XP and one with Red Hat 8.  I'd
>> like to take the harddrive out of the XP machine and drop it in the RH8
>> box as an IDE slave, and then use grub to dual boot.
>>
>> The grub tutorials I've seen so far assume you've either got XP
>> installed
>> and are doing a new Linux install or doing a new install of both.
>>
>> Is it possible to do it as I've described?  Anyone else done this?
>>
>> Thanks as always for the help.
>>
>> John
>
> Check out 'info grub';
> File: grub.info,  Node: General boot methods,  Next: OS-specific notes,
> Up: Bo\
> oting
>
> How to boot operating systems
> =============================
>
>    GRUB has two distinct boot methods. One of the two is to load an
> operating system directly, and the other is to chain-load another boot
> loader which then will load an operating system actually. Generally
> speaking, the former is desirable, because you don't need to install or
> maintain other boot loaders and GRUB is flexible enough to load an
> operating system from an arbitrary disk/partition. However, the latter
> is sometimes required, since GRUB doesn't support all the existing
> operating systems natively.
>
> * Menu:
>
> * Loading an operating system directly::
> * Chain-loading::
>
> DOS/Windows
> -----------
>
>    GRUB cannot boot DOS or Windows directly, so you must chain-load them
> (*note Chain-loading::). However, their boot loaders have some critical
> deficiencies, so it may not work to just chain-load them. To overcome
> the problems, GRUB provides you with two helper functions.
>
>    If you have installed DOS (or Windows) on a non-first hard disk, you
> have to use the disk swapping technique, because that OS cannot boot
> from any disks but the first one. The workaround used in GRUB is the
> command `map' (*note map::), like this:
>
>      grub> map (hd0) (hd1)
>      grub> map (hd1) (hd0)
>
>    This performs a "virtual" swap between your first and second hard
> drive.
>
> HTH
>
> Jonathan Glass
>
> --
> Jonathan Glass
> Systems Support Specialist II
> IBB/GTEC
> Office: 404-385-0127
> Cell: 404-444-4086
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>


-- 
Jonathan Glass
Systems Support Specialist II
IBB/GTEC
Office: 404-385-0127
Cell: 404-444-4086