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Hi,
I'm using two hard disks on my pc. FUJITSU Hard Disk(HD 0), 10GB, with
Fedora 1 installed and Seagate(HD 1), 4GB with windows XP. I'm using
GRUB as my boot loader. Now, whenever I want to change OS, I've to
change my first boot option from HD 0 to HD 1 and vice-versa. How can I
configure my GRUB to boot windows from HD 1(hdb)?

regards,
GVK
--
Happy Hacking!!!

GVK wrote:

> Hi,
> I'm using two hard disks on my pc. FUJITSU Hard Disk(HD 0), 10GB, with
> Fedora 1 installed and Seagate(HD 1), 4GB with windows XP. I'm using
> GRUB as my boot loader. Now, whenever I want to change OS, I've to
> change my first boot option from HD 0 to HD 1 and vice-versa. How can I
> configure my GRUB to boot windows from HD 1(hdb)?
>
> regards,
> GVK

Just to be sure, your both hd are master and slave in the same cable, Fedora
in master hd and Win in the slave hd?(It seems so)

Not sure about XP, but Windows 98 need to be (or at least needs to "think" -
this is the tricky part) it is master, and not the slave...

I'm assuming when you installed Fedora 1 you opted by installing grub in the
mbr, and did not add an entry for a "DOS" entry, as requested, correct? Or
if you did, it seems not to work.

Don't know about grub commands specifically, but in lilo I've seen this
sorted out in quite an easy way (not sure how risky it is, but consider
yourself warned!).

With the LILO instructions below (only the part of the lilo configuration
dealing only with Win 98 quoted below), Win98 thought it was "c:"... :

# DOS bootable partition config begins
other = /dev/hdb1
label = Win98SE
map-drive = 0x80
to = 0x81
map-drive = 0x81
to = 0x80
table = /dev/hdb
# DOS bootable partition config ends

Note the map-drive/to/table instructions above. They are the tricky (and
maybe risky) part. I'm sure there should be something similar for grub.

Good luck!

Paulo

GVK wrote:

> I'm using two hard disks on my pc. FUJITSU Hard Disk(HD 0), 10GB, with
> Fedora 1 installed and Seagate(HD 1), 4GB with windows XP. I'm using
> GRUB as my boot loader. Now, whenever I want to change OS, I've to
> change my first boot option from HD 0 to HD 1 and vice-versa. How can I
> configure my GRUB to boot windows from HD 1(hdb)?


title Windows 2000
map (hd0,0) (hd1,0)
map (hd1,0) (hd0,0)
rootnoverify (hd1,0)
chainloader +1

--
Timothy Murphy
e-mail (<80k only): tim /at/ birdsnest.maths.tcd.ie
tel: +353-86-2336090, +353-1-2842366
s-mail: School of Mathematics, Trinity College, Dublin 2, Ireland

Paulo R. Dallan wrote:
> Just to be sure, your both hd are master and slave in the same cable, Fedora
> in master hd and Win in the slave hd?(It seems so)
Yes, both master and slave in the same cable...Fedora on master and XP
on slave.

> Not sure about XP, but Windows 98 need to be (or at least needs to "think" -
> this is the tricky part) it is master, and not the slave...
Typical of Bill Gates

> I'm assuming when you installed Fedora 1 you opted by installing grub in the
> mbr, and did not add an entry for a "DOS" entry, as requested, correct? Or
> if you did, it seems not to work.
I seleted GRUB to be installed in MBR and it works fine. A few months
after I installed Fedora, I got the second hard disk and got XP running.
I don't know what to add in GRUB so that I can boot without changing
bios settings everytime.

> Don't know about grub commands specifically, but in lilo I've seen this
> sorted out in quite an easy way (not sure how risky it is, but consider
> yourself warned!).
>
> With the LILO instructions below (only the part of the lilo configuration
> dealing only with Win 98 quoted below), Win98 thought it was "c:"... :
>
> # DOS bootable partition config begins
> other = /dev/hdb1
> label = Win98SE
> map-drive = 0x80
> to = 0x81
> map-drive = 0x81
> to = 0x80
> table = /dev/hdb
> # DOS bootable partition config ends
>
> Note the map-drive/to/table instructions above. They are the tricky (and
> maybe risky) part. I'm sure there should be something similar for grub.
>
Thanks, will try it out.

GVK

--
Happy Hacking!!!

Timothy Murphy wrote:
>
> title Windows 2000
> map (hd0,0) (hd1,0)
> map (hd1,0) (hd0,0)
> rootnoverify (hd1,0)
> chainloader +1
>
It worked
Thanks a lot. It would be really helpful if you can explain what's going
on here!!!

GVK
--
Happy Hacking!!!

GVK wrote:

> Timothy Murphy wrote:
>>
>> title Windows 2000
>> map (hd0,0) (hd1,0)
>> map (hd1,0) (hd0,0)
>> rootnoverify (hd1,0)
>> chainloader +1
>>
> It worked
> Thanks a lot. It would be really helpful if you can explain what's going
> on here!!!

Basically, it kids Windows into thinking it is on the master disk.
"info grub" gives quite a lot of info on grub, on my system (Fedora-1),
though I don't find it all that easy to follow.

--
Timothy Murphy
e-mail (<80k only): tim /at/ birdsnest.maths.tcd.ie
tel: +353-86-2336090, +353-1-2842366
s-mail: School of Mathematics, Trinity College, Dublin 2, Ireland

Timothy Murphy wrote:

> GVK wrote:
>
>> Timothy Murphy wrote:
>>>
>>> title Windows 2000
>>> map (hd0,0) (hd1,0)
>>> map (hd1,0) (hd0,0)
>>> rootnoverify (hd1,0)
>>> chainloader +1
>>>
>> It worked
>> Thanks a lot. It would be really helpful if you can explain what's going
>> on here!!!
>
> Basically, it kids Windows into thinking it is on the master disk.
> "info grub" gives quite a lot of info on grub, on my system (Fedora-1),
> though I don't find it all that easy to follow.
>

Good!

So these are the grub instructions equivalent to the lilo ones I mentioned
in the other post. Finally saw an example in how to do it! Thank you!

I've tried to learn more about grub, but did not find it very easy, and did
not find so many resourses (at least at this moment, it was easier to go
deeper into lilo). For practical purposes, continued with lilo, to which I
have more familiarity.

Regards!

Paulo