Enabling server mode
sadfsdf
yellowdog-general@lists.terrasoftsolutions.com
Fri, 06 Aug 2004 15:51:31 -0500
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what should I use to create the hex values?(I am on a minimized console
only linux box)
Bill Fink wrote:
>Hi,
>
>On Fri, 06 Aug 2004, sadfsdf wrote:
>
>
>
>>I've got an old performa 6400, and when it has mac os on it I enabled
>>"server mode" where if it lost power it would power back up again. How
>>do I set this mode again from linux, as I no longer have mac OS installed?
>>
>>
>
>Here's an old message where I explained how to do this on an OldWorld
>PowerMac. One new point is to make sure you are using an ext3 filesystem
>which should be more robust in the event of an unexpected power outage.
>
> -Bill
>
>
>
>Date: Wed, 31 May 2000 05:58:48 -0400
>From: Bill Fink <billfink@capu.net>
>To: linuxppc-user@lists.linuxppc.org
>Subject: Re: Autostart after powerfailure
>
>
>
>>I want my two Linux-boxes running on G4's to start automaticly after a
>>powerfailure.
>>
>>Do I have to do anything in UNIX or is it enough to tell them in Mac OS-mode
>>that "Autostart after a powerfailure" - I think you do that in the
>>powersaving-control.
>>
>>Thanks!
>>
>>/Micke Moggia
>>
>>
>
>Here's what I do on my home router:
>
> 1. I created the 3-byte file /etc/powerup-boot containing exactly
> the following hex sequence (no terminating null or newline):
>
> 0x011301
>
> The first 0x01 indicates this is a CUDA_PACKET (see <asm/adb.h>)
> since the CUDA chip is responsible for power management among
> other things. The 0x13 indicates the specific CUDA parameter
> being accessed or modified, and isn't even documented in
> <asm/cuda.h>, but by digging around in MOL, I figured out that
> it was the CUDA_FILE_SERVER_FLAG parameter. The second 0x01
> indicates that this system is a file server (really any machine
> that has to stay up all the time), and so if there is a power
> failure, when the power is restored, the CUDA chip allows the
> power to be passed through to the main processor initiating
> the boot sequence.
>
> I also created the 3-byte file /etc/powerup-off containing the
> hex sequence:
>
> 0x011300
>
> This file can be used to restore the system to the default powerup
> behavior following a power failure, namely to not automatically
> boot up, requiring the user to turn on the power to the main
> processor to initiate the boot process (this is the way I leave
> my primary home system set up since I'd rather not have it possibly
> damaged by multiple power fluctuations that might occur during a
> severe lightning storm for example - better to just leave it off).
>
> 2. At the end of my /etc/rc.d/rc.local file, I added the following
> line:
>
> cat /etc/powerup-boot >> /dev/adb
>
> The ADB device is used to access and control the CUDA chip.
> This command may actually only have to be done once rather than
> during every boot, but I haven't tested that, and it seemed safer
> to just redo it every boot. I believe the power management
> settings are kept in the PRAM so they should in theory be saved
> across reboots.
>
> 3. I set the Open Firmware variable boot-command to:
>
> begin ['] boot catch 1000 ms cr again
>
> This allows the disk time to spin up, and retries the boot command
> after a second (I got this tidbit from one of the installation
> manuals).
>
>I figured out a lot of this by looking at Takashi Oe's pmacpow-tool
>source, which allows you to set the powerup time on a PowerMac (I was
>too lazy to modify his source to add an option to set/clear the
>CUDA_FILE_SERVER_FLAG parameter, but it should be relatively easy
>to do).
>
>To test this you have to be relatively brave and simulate a power
>failure by for example pulling the power cord (after doing a few sync
>commands of course to flush the disk cache in memory out to the actual
>disk). After doing a graceful shutdown, the user still has to explicitly
>reapply power to the main processor by pressing the power key. I am using
>this on my home router (a 7500) and have also tested it on my primary
>home system (a 6500) and it works fine on both these systems.
>
>Some of this may be processor or model dependent, so YMMV. And of
>course I assume absolutely no responsibility whatsoever for any negative
>impact on your system, so use this advice with appropriate caution (for
>example make sure to have a recent, validated system backup if concerned
>about data integrity before performing the power failure test).
>
> -HTH
>
> -Bill Fink
>
>P.S. The Power Saving Control Panel should also work fine I think since
> it should effectively be doing the same thing by setting the
> CUDA_FILE_SERVER_FLAG parameter in the PRAM.
>_______________________________________________
>yellowdog-general mailing list
>yellowdog-general@lists.terrasoftsolutions.com
>http://lists.terrasoftsolutions.com/mailman/listinfo/yellowdog-general
>HINT: to Google archives, try '<keywords> site:terrasoftsolutions.com'
>
>
>
>
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what should I use to create the hex values?(I am on a minimized console
only linux box)<br>
Bill Fink wrote:<br>
<blockquote cite="mid20040806120753.1b034b34.billfink@mindspring.com"
type="cite">
<pre wrap="">Hi,
On Fri, 06 Aug 2004, sadfsdf wrote:
</pre>
<blockquote type="cite">
<pre wrap="">I've got an old performa 6400, and when it has mac os on it I enabled
"server mode" where if it lost power it would power back up again. How
do I set this mode again from linux, as I no longer have mac OS installed?
</pre>
</blockquote>
<pre wrap=""><!---->
Here's an old message where I explained how to do this on an OldWorld
PowerMac. One new point is to make sure you are using an ext3 filesystem
which should be more robust in the event of an unexpected power outage.
-Bill
Date: Wed, 31 May 2000 05:58:48 -0400
From: Bill Fink <<a class="moz-txt-link-abbreviated" href="mailto:billfink@capu.net">billfink@capu.net</a>>
To: <a class="moz-txt-link-abbreviated" href="mailto:linuxppc-user@lists.linuxppc.org">linuxppc-user@lists.linuxppc.org</a>
Subject: Re: Autostart after powerfailure
</pre>
<blockquote type="cite">
<pre wrap="">I want my two Linux-boxes running on G4's to start automaticly after a
powerfailure.
Do I have to do anything in UNIX or is it enough to tell them in Mac OS-mode
that "Autostart after a powerfailure" - I think you do that in the
powersaving-control.
Thanks!
/Micke Moggia
</pre>
</blockquote>
<pre wrap=""><!---->
Here's what I do on my home router:
1. I created the 3-byte file /etc/powerup-boot containing exactly
the following hex sequence (no terminating null or newline):
0x011301
The first 0x01 indicates this is a CUDA_PACKET (see <asm/adb.h>)
since the CUDA chip is responsible for power management among
other things. The 0x13 indicates the specific CUDA parameter
being accessed or modified, and isn't even documented in
<asm/cuda.h>, but by digging around in MOL, I figured out that
it was the CUDA_FILE_SERVER_FLAG parameter. The second 0x01
indicates that this system is a file server (really any machine
that has to stay up all the time), and so if there is a power
failure, when the power is restored, the CUDA chip allows the
power to be passed through to the main processor initiating
the boot sequence.
I also created the 3-byte file /etc/powerup-off containing the
hex sequence:
0x011300
This file can be used to restore the system to the default powerup
behavior following a power failure, namely to not automatically
boot up, requiring the user to turn on the power to the main
processor to initiate the boot process (this is the way I leave
my primary home system set up since I'd rather not have it possibly
damaged by multiple power fluctuations that might occur during a
severe lightning storm for example - better to just leave it off).
2. At the end of my /etc/rc.d/rc.local file, I added the following
line:
cat /etc/powerup-boot >> /dev/adb
The ADB device is used to access and control the CUDA chip.
This command may actually only have to be done once rather than
during every boot, but I haven't tested that, and it seemed safer
to just redo it every boot. I believe the power management
settings are kept in the PRAM so they should in theory be saved
across reboots.
3. I set the Open Firmware variable boot-command to:
begin ['] boot catch 1000 ms cr again
This allows the disk time to spin up, and retries the boot command
after a second (I got this tidbit from one of the installation
manuals).
I figured out a lot of this by looking at Takashi Oe's pmacpow-tool
source, which allows you to set the powerup time on a PowerMac (I was
too lazy to modify his source to add an option to set/clear the
CUDA_FILE_SERVER_FLAG parameter, but it should be relatively easy
to do).
To test this you have to be relatively brave and simulate a power
failure by for example pulling the power cord (after doing a few sync
commands of course to flush the disk cache in memory out to the actual
disk). After doing a graceful shutdown, the user still has to explicitly
reapply power to the main processor by pressing the power key. I am using
this on my home router (a 7500) and have also tested it on my primary
home system (a 6500) and it works fine on both these systems.
Some of this may be processor or model dependent, so YMMV. And of
course I assume absolutely no responsibility whatsoever for any negative
impact on your system, so use this advice with appropriate caution (for
example make sure to have a recent, validated system backup if concerned
about data integrity before performing the power failure test).
-HTH
-Bill Fink
P.S. The Power Saving Control Panel should also work fine I think since
it should effectively be doing the same thing by setting the
CUDA_FILE_SERVER_FLAG parameter in the PRAM.
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HINT: to Google archives, try '<keywords> site:terrasoftsolutions.com'
</pre>
</blockquote>
<br>
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