xbox-linux-hacking Mailing List for Linux on the Microsoft Xbox

On Mon, Apr 19, 2004 at 09:55:47PM -0400, Jerry McBride wrote:
> Steve Yalovitser wrote:
> 
> > Folks,
> > 
> > This may not be the right area to ask the question, but as its hardware
> > oriented, here goes...
> > 
> > I've been running Ps2 w/Linux for many days (40)straight and after a while
> > I've started manifesting problems w/DVD as well as the HD due to
> > overheating/fan issues.
> > 
> > Has anyone run the XBOX as a "server" 24/7 for a long period of time, and
> > experienced any heat related issues? Or other failure issues you wouldnt
> > find in a typical intel server?
> > 
> 
> My first xbox has been running 24/7 for about two weeks now, the second one
> for just a few days. Although they seem to run warm, perhaps a bit more
> than your average pc, they seem to handle it quite well.
> 
> My intention is to build a small cluster attached to my home lan for heavy
> compile sessions via distcc and ccache on gentoo. So far, with the addition
> of the second xbox, things are really going faster...

root@xbox:~# uptime
 15:09:37 up 29 days, 20:53,  1 user,  load average: 0.99, 0.97, 0.97

So far so good, and I use it mainly as a frontend for MythTV and as a
distributed.net node.
-- 
  Matthew Daubenspeck
  http://www.oddprocess.org

15:12:12 up 5 days, 20:05, 1 user, load average: 0.02, 0.09, 0.05

Steve Yalovitser wrote:

> Folks,
> 
> This may not be the right area to ask the question, but as its hardware
> oriented, here goes...
> 
> I've been running Ps2 w/Linux for many days (40)straight and after a while
> I've started manifesting problems w/DVD as well as the HD due to
> overheating/fan issues.
> 
> Has anyone run the XBOX as a "server" 24/7 for a long period of time, and
> experienced any heat related issues? Or other failure issues you wouldnt
> find in a typical intel server?
> 

My first xbox has been running 24/7 for about two weeks now, the second one
for just a few days. Although they seem to run warm, perhaps a bit more
than your average pc, they seem to handle it quite well.

My intention is to build a small cluster attached to my home lan for heavy
compile sessions via distcc and ccache on gentoo. So far, with the addition
of the second xbox, things are really going faster...

I just wish there was an easy way to upgrade the memory and processor
without breaking out the solder iron...


-- 

******************************************************************************
                     Registered Linux User Number 185956
          http://groups.google.com/groups?hl=en&safe=off&group=linux
             Join me in chat at #linux-users on irc.freenode.net
Buy an Xbox for $149.00, run linux on it and Microsoft loses $150.00! 
9:18pm  up 39 min,  5 users,  load average: 0.12, 0.13, 0.09

At 23:15 9/30/2003, Shawn Percifield wrote:
>confirm 726694

your confirmation went to the whole list instead of the listbot at 
xbo...@li...

you'll have to resend to the correct place.

hth,
marc 

confirm 726694




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Hi,
where can we find a manual to fit the larger ram ?
thank you !

BR/MfG
Markus <freakware GmbH>
www.freakware.de

-----Urspr=FCngliche Nachricht-----
Von: xbo...@li...
[mailto:xbo...@li...] Im Auftrag von
xbo...@li...
Gesendet: Samstag, 12. Juli 2003 05:35
An: xbo...@li...
Betreff: Xbox-linux-hacking digest, Vol 1 #7 - 3 msgs

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Today's Topics:

   1. Re: Upgrading Xbox RAM (Oliver Schwartz)
   2. MTBF of an XBOX (Steve Yalovitser)
   3. Re: MTBF of an XBOX (costal martignier)

--__--__--

Message: 1
From: Oliver Schwartz <Oli...@gm...>
To: xbo...@li...
Subject: Re: [Xbox-linux-hacking] Upgrading Xbox RAM
Date: Fri, 11 Jul 2003 19:12:59 +0200

=3D2D----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Hi,

> I'm looking at using xboxes as compute servers, are there anyway I
> can go from 64MB to say 256MB ? In my experience 64MB isnt
> typically enough for compute intensive applications. Please respond
> to my e-mail if you've had experience with swapping out the RAM
> chips.

It's possible to add another 64 MB in the four spare sockets on the=3D20
motherboard. I don't think it's possible to replace the existing =
RAM,=3D20
but I haven't tried.

As far as Linux is concerned support for more than 64 MB is =
untested=3D20
yet. That's likely to change, however. Today I got my additional 64=3D20
MB from Wolfsoft (http://www.wolfsoft.de). As soon as I find the =
time=3D20
to solder the chips I'll get the Linux on the box to support them.=3D20
I'll keep the list informed of any progress.

=3D2D -Oliver

PS: These kind of questions are better asked on xbox-linux-devel
=3D2D----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.0.6 (GNU/Linux)
Comment: For info see http://www.gnupg.org

iD8DBQE/DvAb/V6sbrmfIuMRAirFAJ4jLRdffXDTTz8ml6kYFFIZPrUrHwCeO9ux
vWusVcFiypA3rehdjShqrz4=3D3D
=3D3DcQ9L
=3D2D----END PGP SIGNATURE-----



--__--__--

Message: 2
From: "Steve Yalovitser" <ya...@in...>
To: <xbo...@li...>
Date: Fri, 11 Jul 2003 18:35:03 -0400
Subject: [Xbox-linux-hacking] MTBF of an XBOX

Folks,

This may not be the right area to ask the question, but as its hardware
oriented, here goes...

I've been running Ps2 w/Linux for many days (40)straight and after a =
while
I've started manifesting problems w/DVD as well as the HD due to
overheating/fan issues.

Has anyone run the XBOX as a "server" 24/7 for a long period of time, =
and
experienced any heat related issues? Or other failure issues you wouldnt
find in a typical intel server?

Cheers,

Steve V. Yalovitser, CTO
Integrasoft LLC
80 Broad Street
NY, NY 10004
Office: 1-212-837-7797
Cell: 1-646-295-6136



--__--__--

Message: 3
To: xbo...@li...
Subject: Re: [Xbox-linux-hacking] MTBF of an XBOX
From: costal martignier <lin...@bl...>
Organization: -none-
Date: Sat, 12 Jul 2003 01:17:00 +0200

hello steve,


     01:12:41 up 47 days, 23 min,  1 user,  load average: 0.00, 0.00, =
0.00

i have a 120 gig harddrive and additionaly i have a webcam attached.
i never had any problems.
the uptime could be mutch more the 180 days, because my xbox
run allready 180 days as a linuxserver.
(fileserver mailserver webserver mp3jukebox videoplayer)

greetz

costal martignier




--__--__--

_______________________________________________
Xbox-linux-hacking mailing list
Xbo...@li...
https://lists.sourceforge.net/lists/listinfo/xbox-linux-hacking


End of Xbox-linux-hacking Digest

hello steve,


     01:12:41 up 47 days, 23 min,  1 user,  load average: 0.00, 0.00, 0.00

i have a 120 gig harddrive and additionaly i have a webcam attached.
i never had any problems.
the uptime could be mutch more the 180 days, because my xbox
run allready 180 days as a linuxserver.
(fileserver mailserver webserver mp3jukebox videoplayer)

greetz

costal martignier

Folks,

This may not be the right area to ask the question, but as its hardware
oriented, here goes...

I've been running Ps2 w/Linux for many days (40)straight and after a while
I've started manifesting problems w/DVD as well as the HD due to
overheating/fan issues.

Has anyone run the XBOX as a "server" 24/7 for a long period of time, and
experienced any heat related issues? Or other failure issues you wouldnt
find in a typical intel server?

Cheers,

Steve V. Yalovitser, CTO
Integrasoft LLC
80 Broad Street
NY, NY 10004
Office: 1-212-837-7797
Cell: 1-646-295-6136

=2D----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Hi,

> I'm looking at using xboxes as compute servers, are there anyway I
> can go from 64MB to say 256MB ? In my experience 64MB isnt
> typically enough for compute intensive applications. Please respond
> to my e-mail if you've had experience with swapping out the RAM
> chips.

It's possible to add another 64 MB in the four spare sockets on the=20
motherboard. I don't think it's possible to replace the existing RAM,=20
but I haven't tried.

As far as Linux is concerned support for more than 64 MB is untested=20
yet. That's likely to change, however. Today I got my additional 64=20
MB from Wolfsoft (http://www.wolfsoft.de). As soon as I find the time=20
to solder the chips I'll get the Linux on the box to support them.=20
I'll keep the list informed of any progress.

=2D -Oliver

PS: These kind of questions are better asked on xbox-linux-devel
=2D----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.0.6 (GNU/Linux)
Comment: For info see http://www.gnupg.org

iD8DBQE/DvAb/V6sbrmfIuMRAirFAJ4jLRdffXDTTz8ml6kYFFIZPrUrHwCeO9ux
vWusVcFiypA3rehdjShqrz4=3D
=3DcQ9L
=2D----END PGP SIGNATURE-----

Hello,

I'm looking at using xboxes as compute servers, are there anyway I can go
from 64MB to say 256MB ? In my experience 64MB isnt typically enough for
compute intensive applications. Please respond to my e-mail if you've had
experience with swapping out the RAM chips.

Cheers,

Steve

I'm a software developer that's interested in this whole "project B" 
things as a challenge, and also as I'd like to be able to develop my 
own software for my X-Box (i.e. I'd like to be able to run stuff I'd 
developed using OpenXDK or something similar) without mod'ing my 'box. 
I think I may have some ideas about how to create a .xbe that the Xbox 
kernel will be fooled into loading, but I don't know enough about the 
Xbox kernel's verification/signing process yet to know if my ideas are 
stupid or not :-).  As I hinted above, I'm fairly unkeen on mod'ing my 
XBox, but really all I need is a few more details to expand on the 
excellent "XBox Security Concept" doc' by Franz Lehner.  I think I've 
got a good grasp on the most of it, but I could really use a little 
clarificaton of more details as to what is meant by the following  -

"When the Xbox loads an XBE file, it first checks whether the header 
is "valid".
This is done by comparing the calculated SHA-1 hash against the 
decrypted RSA signature.
The RSA signature is "padded" in the format 01FFFFFFFFFFFFFF.......FF00
(HASH 20bytes)"

1. I assume the SHA1 hash referred to is calculated on the whole xbe 
header, including the RSA Signature, TLS and library version structures 
etc. ?

2. The "decrypted RSA signature" - is this the 256 bytes from the Image 
header modified by the public key (i.e use the public key to "encrypt 
it"), or is the hash value calculated from the header padded to 256 
bytes (as described), encrypted using the public key, and then compared 
to the 256 bytes in the image header ? I guess my question could be 
answered by 'is the 256 byte RSA signature therefore "cipher text" ?' 
or 'when you say "decrypt Signature" don't you mean "encrypt 
signature" ?' as the RSA algorithm decrypts with the private key, which 
isn't on the XBox anywhere (as I understand it).

As it stands, I struggle to see how, even with the private key, the RSA 
signature can be created at all, as the value of the signature seems to 
depend on the SHA1 hash on data which includes it's own value, creating 
the proverbial chicken and egg scenario - as it is described anyway 
(i.e it seems to suggest you need the hash to calculate the signature, 
but you can't calculate the hash until you have the signature).

If I had some way of reading a signed .xbe on my PC, I could probably 
answer these questions myself through experimentation, but, as I am 
very reluctant to open the case on my XBox, I don't have any way of 
examining any such files in a binary manner (i.e other than by playing 
them on my XBox :-) )  Is there any known (legal) source of .xbe's 
distributed on media other than the proprietry DVD format ? Is there 
any way to read XBox media on a PC ?

cheers,

mj.


----------------
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The xbox-linux doco gives the xbox public key as

2074011932725872376027602350906301713845599360627488352673195511324110900735 
4362374128996096291046353572306742110305456946824862203867115042369878729703 
4757651122801674981890464377946029661688124194233651969796694319295889511268 
0464874302938783366603176573433716594963473137559247167029424618087781510481 
2674626967450097045005117546657068700545263064105024888769118032059917845867 
6530404194040036845598825091953986309228240504053796205135896999939802056942 
6697323609577215347638826741847653366351274624331031785386194643005307289050 
2949319703765023792161144942611323629444409600173894963797156859916567288947 
565058003

However an RSA public key is supposed to have a 'd' value which is the 
exponent used for decryption (the 'e' value is the private key which can 
be worked out if you can factor the number above, a process which will 
probably take until all the black holes evaporate).

If the 'd' (exponent) value known, and if so, what is it?

Tim Josling

confirm 800102


Uric Henderson & Pierre Ames 
President/Vice President (Lead Programmer/Developers) 
HA Programming Development LLC 
9205 Traders Crossing #E 
Laurel, MD 20723 
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301.725.1578


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Are any people ready to start talking about project B?  I don't want to
start posting for real until people have subscribed.

BTW:  I've been busy for a while, but I've been playing with XBL for a few
days now.  

Ryan Shoff