[gentoo-user] systemrescuecd: using x86 for amd64

[gentoo-user] systemrescuecd: using x86 for amd64

[Allan Gottlieb]

I have several machines with core2-duo chips.  Some run x86, others
amd64.  All are gentoo.

The http://sourceforge.net/projects/systemrescuecd has a version for
x86.  I realize it will boot on all my systems.  I am hoping that

1.  I can use it to install either amd64 or x86 gentoo

2.  I can use it to repair amd64 or x86 gentoo systems.

Is this correct and if not what things will I be unable to do for amd64?

thanks,
allan

Re: [gentoo-user] systemrescuecd: using x86 for amd64

[Allan Gottlieb]

At Tue, 04 Nov 2008 15:35:26 -0500 Allan Gottlieb <gottlieb@nyu.edu> wrote:

> I have several machines with core2-duo chips.  Some run x86, others
> amd64.  All are gentoo.
>
> The http://sourceforge.net/projects/systemrescuecd has a version for
> x86.  I realize it will boot on all my systems.  I am hoping that
>
> 1.  I can use it to install either amd64 or x86 gentoo
>
> 2.  I can use it to repair amd64 or x86 gentoo systems.
>
> Is this correct and if not what things will I be unable to do for amd64?

Oops--I just now booted it on an x86 and it states how to do it for
amd64.

Sorry for the noise,
allan

Re: [gentoo-user] systemrescuecd: using x86 for amd64

[Volker Armin Hemmann]

On Dienstag 04 November 2008, Allan Gottlieb wrote:
> I have several machines with core2-duo chips.  Some run x86, others
> amd64.  All are gentoo.
>
> The http://sourceforge.net/projects/systemrescuecd has a version for
> x86.  I realize it will boot on all my systems.  I am hoping that
>
> 1.  I can use it to install either amd64 or x86 gentoo

yes

>
> 2.  I can use it to repair amd64 or x86 gentoo systems.

yes

Re: [gentoo-user] systemrescuecd: using x86 for amd64

[Dirk Heinrichs]

Am Dienstag, 4. November 2008 22:13:09 schrieb Volker Armin Hemmann:
> On Dienstag 04 November 2008, Allan Gottlieb wrote:
> > I have several machines with core2-duo chips.  Some run x86, others
> > amd64.  All are gentoo.
> >
> > The http://sourceforge.net/projects/systemrescuecd has a version for
> > x86.  I realize it will boot on all my systems.  I am hoping that
> >
> > 1.  I can use it to install either amd64 or x86 gentoo
>
> yes
>
> > 2.  I can use it to repair amd64 or x86 gentoo systems.
>
> yes

I also looked at systemrescuecd some time ago, but finally I'm using GRML now 
for rescue purposes (oh, and to install Gentoo systems :-) ). Damn, those 
folks even made me switch to zsh ;-).

Bye...

	Dirk

Re: [gentoo-user] systemrescuecd: using x86 for amd64

[Momesso Andrea]

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On Tue, Nov 04, 2008 at 10:13:09PM +0100, Volker Armin Hemmann wrote:
> On Dienstag 04 November 2008, Allan Gottlieb wrote:
> > I have several machines with core2-duo chips.  Some run x86, others
> > amd64.  All are gentoo.
> >
> > The http://sourceforge.net/projects/systemrescuecd has a version for
> > x86.  I realize it will boot on all my systems.  I am hoping that
> >
> > 1.  I can use it to install either amd64 or x86 gentoo
> 
> yes
> 
> >
> > 2.  I can use it to repair amd64 or x86 gentoo systems.
> 
> yes
> 
So it is possible to chroot from a 32 to a 64 bit enviroment? And is it
safe?

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Re: [gentoo-user] systemrescuecd: using x86 for amd64

[Daniel Pielmeier]

2008/11/5 Momesso Andrea <momesso.andrea@gmail.com>:
> So it is possible to chroot from a 32 to a 64 bit enviroment? And is it
> safe?
>

AFAIK chroot from 32 to 64 bit is not possible.

-- 
Regards,
Daniel

Re: [gentoo-user] systemrescuecd: using x86 for amd64

[Alan McKinnon]

On Wednesday 05 November 2008 09:44:46 Daniel Pielmeier wrote:
> 2008/11/5 Momesso Andrea <momesso.andrea@gmail.com>:
> > So it is possible to chroot from a 32 to a 64 bit enviroment? And is it
> > safe?
>
> AFAIK chroot from 32 to 64 bit is not possible.

To remove all doubt about this, it is definitely not possible. The 32 bit 
kernel cannot run the 64 bit code that the chroot will provide.

-- 
alan dot mckinnon at gmail dot com

Re: [gentoo-user] systemrescuecd: using x86 for amd64

[Volker Armin Hemmann]

On Mittwoch 05 November 2008, Alan McKinnon wrote:
> On Wednesday 05 November 2008 09:44:46 Daniel Pielmeier wrote:
> > 2008/11/5 Momesso Andrea <momesso.andrea@gmail.com>:
> > > So it is possible to chroot from a 32 to a 64 bit enviroment? And is it
> > > safe?
> >
> > AFAIK chroot from 32 to 64 bit is not possible.
>
> To remove all doubt about this, it is definitely not possible. The 32 bit
> kernel cannot run the 64 bit code that the chroot will provide.

and that is why systemrescuecd has a 64bit kernel for people who want or need 
to chroot.

Re: [gentoo-user] systemrescuecd: using x86 for amd64

[Volker Armin Hemmann]

On Mittwoch 05 November 2008, Daniel Pielmeier wrote:
> 2008/11/5 Momesso Andrea <momesso.andrea@gmail.com>:
> > So it is possible to chroot from a 32 to a 64 bit enviroment? And is it
> > safe?
>
> AFAIK chroot from 32 to 64 bit is not possible.

you are wrong.

You can do it, BUT you need a 64bit kernel.

Re: [gentoo-user] systemrescuecd: using x86 for amd64

[Alan McKinnon]

On Wednesday 05 November 2008 18:22:00 Volker Armin Hemmann wrote:
> On Mittwoch 05 November 2008, Daniel Pielmeier wrote:
> > 2008/11/5 Momesso Andrea <momesso.andrea@gmail.com>:
> > > So it is possible to chroot from a 32 to a 64 bit enviroment? And is it
> > > safe?
> >
> > AFAIK chroot from 32 to 64 bit is not possible.
>
> you are wrong.
>
> You can do it, BUT you need a 64bit kernel.

Ah, but how often have you seen a 32 bit userland running atop a 64 bit 
kernel? I've never seen it (unusual cases like a 32 bit Firefox on a 64 bit 
system excepted)

-- 
alan dot mckinnon at gmail dot com

Re: [gentoo-user] systemrescuecd: using x86 for amd64

[Volker Armin Hemmann]

On Mittwoch 05 November 2008, Alan McKinnon wrote:
> On Wednesday 05 November 2008 18:22:00 Volker Armin Hemmann wrote:
> > On Mittwoch 05 November 2008, Daniel Pielmeier wrote:
> > > 2008/11/5 Momesso Andrea <momesso.andrea@gmail.com>:
> > > > So it is possible to chroot from a 32 to a 64 bit enviroment? And is
> > > > it safe?
> > >
> > > AFAIK chroot from 32 to 64 bit is not possible.
> >
> > you are wrong.
> >
> > You can do it, BUT you need a 64bit kernel.
>
> Ah, but how often have you seen a 32 bit userland running atop a 64 bit
> kernel? I've never seen it (unusual cases like a 32 bit Firefox on a 64 bit
> system excepted)

just boot systemresucuecd with the 64bit kernel. You have a 32bit userland, 
64bit kernel and you can chroot into 64bit systems without any problems at 
all.

Done it several times.