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#1 (**permalink**) 01-18-2008, 08:09 AM

I have a hardrive with windows XP. On another Hardrive I hav
Redhat9
While installing redhat9, I had disconnected my third drive to save i
from accidentally getting format ( this makes it pretty clear that I'
a newbie)
Anyways, When I connected this drive, thegrub boot loader just doesn'
show me any options of OSs to choose from?
Could somebody tell me how to I modify my /boot/grub/grub.conf to mak
it all work again.
PS1:The windows HDD is my primary master, the Redhat9 is secondar
slave and the Third one is the primary Slave

PS2: In root(hdd1,4) , does hdd1 mean the 2nd hardisk and 4 mean th
fourth partition in the system

#2 (**permalink**) 01-18-2008, 08:09 AM

Mandrolla wrote:

> PS2: In root(hdd1,4) , does hdd1 mean the 2nd hardisk and 4 mean the
> fourth partition in the system?

This should be hd1.
Also if you have changed the disk arrangement,
you probably should say "grub-install --recheck /dev/hda".

--
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

#3 (**permalink**) 01-18-2008, 08:09 AM

Timothy Murphy wrote:
>
.... snip ...
>
> Also if you have changed the disk arrangement,
> you probably should say "grub-install --recheck /dev/hda".

Is there something similar for LILO reinstallation?

--
"If you want to post a followup via groups.google.com, don't use
the broken "Reply" link at the bottom of the article. Click on
"show options" at the top of the article, then click on the
"Reply" at the bottom of the article headers." - Keith Thompson

#4 (**permalink**) 01-18-2008, 08:10 AM

"CBFalconer" <cbfalconer@yahoo.com> wrote in message
news:42ECBBE0.E3A3BB58@yahoo.com...
> Timothy Murphy wrote:
>>
> ... snip ...
>>
>> Also if you have changed the disk arrangement,
>> you probably should say "grub-install --recheck /dev/hda".
>
> Is there something similar for LILO reinstallation?

Typing "lilo".

#5 (**permalink**) 01-18-2008, 08:10 AM

Nico Kadel-Garcia wrote:
> "CBFalconer" <cbfalconer@yahoo.com> wrote in message
>> Timothy Murphy wrote:
>>>
>> ... snip ...
>>>
>>> Also if you have changed the disk arrangement,
>>> you probably should say "grub-install --recheck /dev/hda".
>>
>> Is there something similar for LILO reinstallation?
>
> Typing "lilo".

That certainly sounds simple enough, but dangerous. I assume it
will then recheck all the physical drives present for boot sectors,
incorporate them in lilo.conf, and write the new MBR out? Can't
get at the documentation just now.

--
Chuck F (cbfalconer@yahoo.com) (cbfalconer@worldnet.att.net)
Available for consulting/temporary embedded and systems.
<http://cbfalconer.home.att.net> USE worldnet address!

#6 (**permalink**) 01-18-2008, 08:10 AM

CBFalconer wrote:

>>> Is there something similar for LILO reinstallation?
>>
>> Typing "lilo".
>
> That certainly sounds simple enough, but dangerous. I assume it
> will then recheck all the physical drives present for boot sectors,
> incorporate them in lilo.conf, and write the new MBR out? Can't
> get at the documentation just now.

You _must_ run "lilo" if change lilo.conf .
Otherwise your changes will not take effect.

--
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

#7 (**permalink**) 01-18-2008, 08:10 AM

"CBFalconer" <cbfalconer@yahoo.com> wrote in message
news:42ED1DB3.1C0F868B@yahoo.com...
> Nico Kadel-Garcia wrote:
>> "CBFalconer" <cbfalconer@yahoo.com> wrote in message
>>> Timothy Murphy wrote:
>>>>
>>> ... snip ...
>>>>
>>>> Also if you have changed the disk arrangement,
>>>> you probably should say "grub-install --recheck /dev/hda".
>>>
>>> Is there something similar for LILO reinstallation?
>>
>> Typing "lilo".
>
> That certainly sounds simple enough, but dangerous. I assume it
> will then recheck all the physical drives present for boot sectors,
> incorporate them in lilo.conf, and write the new MBR out? Can't
> get at the documentation just now.

It doesn't check for anything, it just does rewrites it. The "recheck"
option is necessary, but hardly necessary for most work.

#8 (**permalink**) 01-18-2008, 08:10 AM

Timothy Murphy wrote:
> CBFalconer wrote:
>
> >>> Is there something similar for LILO reinstallation?
> >>
> >> Typing "lilo".
> >
> > That certainly sounds simple enough, but dangerous. I assume it
> > will then recheck all the physical drives present for boot sectors,
> > incorporate them in lilo.conf, and write the new MBR out? Can't
> > get at the documentation just now.
>
> You _must_ run "lilo" if change lilo.conf .
> Otherwise your changes will not take effect.

I realize that. What I am thinking about is the situation where I
suddenly replace one complete hard drive in the system. Now
lilo.conf needs to be modified for whatever is present on that
drive. That can be laborious or easy.

For example, my secondary drive has a bootable W95 system on it.
The Mandrake installer found it and installed an option to boot to
it (which works). When I change out that complete drive I need to
revise lilo.conf accordingly.

--
Chuck F (cbfalconer@yahoo.com) (cbfalconer@worldnet.att.net)
Available for consulting/temporary embedded and systems.
<http://cbfalconer.home.att.net> USE worldnet address!

#9 (**permalink**) 01-18-2008, 08:10 AM

Nico Kadel-Garcia wrote:
> "CBFalconer" <cbfalconer@yahoo.com> wrote in message
>> Nico Kadel-Garcia wrote:
>>> "CBFalconer" <cbfalconer@yahoo.com> wrote in message
>>>> Timothy Murphy wrote:
>>>>>
>>>> ... snip ...
>>>>>
>>>>> Also if you have changed the disk arrangement,
>>>>> you probably should say "grub-install --recheck /dev/hda".
>>>>
>>>> Is there something similar for LILO reinstallation?
>>>
>>> Typing "lilo".
>>
>> That certainly sounds simple enough, but dangerous. I assume it
>> will then recheck all the physical drives present for boot sectors,
>> incorporate them in lilo.conf, and write the new MBR out? Can't
>> get at the documentation just now.
>
> It doesn't check for anything, it just does rewrites it. The
> "recheck" option is necessary, but hardly necessary for most work.

That was the point of my original query. I gather that
"grub-install --recheck <dev>" will gather up and reinstall
whatever bootable systems are present on <dev>. I wanted to know
if a similar function was available for lilo. It should go to the
raw data, i.e. not depend on previously constructed tables.

--
Chuck F (cbfalconer@yahoo.com) (cbfalconer@worldnet.att.net)
Available for consulting/temporary embedded and systems.
<http://cbfalconer.home.att.net> USE worldnet address!

#10 (**permalink**) 01-18-2008, 08:10 AM

"CBFalconer" <cbfalconer@yahoo.com> wrote in message
news:42EDF89B.35D6FD77@yahoo.com...

> That was the point of my original query. I gather that
> "grub-install --recheck <dev>" will gather up and reinstall
> whatever bootable systems are present on <dev>. I wanted to know
> if a similar function was available for lilo. It should go to the
> raw data, i.e. not depend on previously constructed tables.

No such luck. LILO is a *TEENY* little program, designed to run as part of
boot and installation floppies, so it's extremely lightweight and short on
"it should do this cool occasionally useful feature".

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