[SunHELP] System Halt

Wed Jun 20 14:19:15 CDT 2001

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Don't know if this is what you are really looking for, but it
should stop most the halts.

PC's and Terminal Servers acting as consoles for Solaris systems send out a
break signal when they power on or off. This causes the Solaris system to
drop down to the OK prompt unintentionally. Pulling out a keyboard from a
live system and reconnecting it also causes the system to drop to the OK
prompt.

You can prevent this by setting the following variable in /etc/system:

set abort_enable=0

Now reboot for it to take effect.  This will disable all break signals on
the system.

Solaris 8 introduced a new feature which gives the system the
ability to force a hanging system to halt when required, without
allowing random or spurious Breaks to cause an unintentional stop. The new
sequence to stop the system is:

<RETURN> <TILDE> <CONTROL B>

There must be an interval of more than 0.5 seconds between characters, and
the entire string must be entered in less than 5 seconds.  This is true only
with serial devices acting as consoles and not for systems with keyboards of
their own.

This feature has been backported to Solaris 2.6 and Solaris 7 as well. The
patch 105924-10 for Solaris 2.6 and 107589-02 or higher for Solaris 7 is
required to enable this feature.

Dennis L. Lund

-----Original Message-----
From: James Fogg [mailto:jfogg at vicinity.com]
Sent: Wednesday, June 20, 2001 1:40 PM
To: sunhelp at sunhelp.org
Subject: Re: [SunHELP] System Halt

Sun systems interpret a serial port break (software break or a toggle of the
DTR
pin) as a request to drop to OBP. Most aggrevating.

There are some patches that address this, check with your Sun support
people.

On Wed, 20 Jun 2001, THOU SPAKE:
> Dear Gurus,
> 
> Attached to the serial port of my Sparc Server 1000E I have a console,
every 
> problem in this console, my system halts (monouser mode).
> 
> Does anyone knows how can make my server independent from this console???
> 
> Thanks,
> 
> Sergio
> _________________________________________________________________________
> Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com.
> 
> _______________________________________________
> SunHELP maillist  -  SunHELP at sunhelp.org
> http://www.sunhelp.org/mailman/listinfo/sunhelp
-- 
=======================================================
	 James D. Fogg, Network Engineer
	Vicinity Corporation - Lebanon, NH

     DESK (603) 442-1751 - CELL (603) 252-1864
     PAGER (802) 742-0280 - HOME (603) 526-7729
            EMAIL jfogg at vicinity.com

If you can read this e-mail, Thank a Network Engineer!
=======================================================
_______________________________________________
SunHELP maillist  -  SunHELP at sunhelp.org
http://www.sunhelp.org/mailman/listinfo/sunhelp

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<TITLE>RE: [SunHELP] System Halt</TITLE>
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<P><FONT SIZE=3D2>Don't know if this is what you are really looking for, bu=
t it</FONT>
<BR><FONT SIZE=3D2>should stop most the halts.</FONT>
</P>

PC's and Terminal Servers acting as consoles for Solaris =
systems send out a break signal when they power on or off. This causes the =
Solaris system to drop down to the OK prompt unintentionally. Pulling out a=
 keyboard from a live system and reconnecting it also causes the system to =
drop to the OK prompt.

<P><FONT SIZE=3D2>You can prevent this by setting the following variable in=
 /etc/system:</FONT>
</P>

<P><FONT SIZE=3D2>set abort_enable=3D0</FONT>
</P>

<P><FONT SIZE=3D2>Now reboot for it to take effect.  This will disable=
 all break signals on the system.</FONT>
</P>

Solaris 8 introduced a new feature which gives the system=
 the
 ability to force a hanging system to halt when required,=
 without
 allowing random or spurious Breaks to cause an unintenti=
onal stop. The new sequence to stop the system is:

<P><FONT SIZE=3D2><RETURN> <TILDE> <CONTROL B></FONT>
</P>

<P><FONT SIZE=3D2>There must be an interval of more than 0.5 seconds betwee=
n characters, and the entire string must be entered in less than 5 seconds.=
  This is true only with serial devices acting as consoles and not for=
 systems with keyboards of their own.</FONT></P>

This feature has been backported to Solaris 2.6 and Solar=
is 7 as well. The patch 105924-10 for Solaris 2.6 and 107589-02 or higher f=
or Solaris 7 is required to enable this feature.

<P><FONT SIZE=3D2>Dennis L. Lund</FONT>
</P>

<P><FONT SIZE=3D2>-----Original Message-----</FONT>
<BR><FONT SIZE=3D2>From: James Fogg [<A HREF=3D"mailto:jfogg at vicinity.com">=
mailto:jfogg at vicinity.com</A>]</FONT>
<BR><FONT SIZE=3D2>Sent: Wednesday, June 20, 2001 1:40 PM</FONT>
<BR><FONT SIZE=3D2>To: sunhelp at sunhelp.org</FONT>
<BR><FONT SIZE=3D2>Subject: Re: [SunHELP] System Halt</FONT>
</P>
<BR>

Sun systems interpret a serial port break (software break=
 or a toggle of the DTR
 pin) as a request to drop to OBP. Most aggrevating.</FON=
T>

<P><FONT SIZE=3D2>There are some patches that address this, check with your=
 Sun support people.</FONT>
</P>

On Wed, 20 Jun 2001, THOU SPAKE:
 > Dear Gurus,
 > 
 > Attached to the serial port of my Sparc Server 1000=
E I have a console, every 
 > problem in this console, my system halts (monouser =
mode).
 > 
 > Does anyone knows how can make my server independen=
t from this console???
 > 
 > Thanks,
 > 
 > Sergio
 > ___________________________________________________=
______________________
 > Get Your Private, Free E-mail from MSN Hotmail at <=
A HREF=3D"http://www.hotmail.com" TARGET=3D"_blank">http://www.hotmail.com<=
/A>.
 > 
 > _______________________________________________</FO=
NT>
 > SunHELP maillist  -  SunHELP at sunhelp.org<=
/FONT>
 > <A HREF=3D"http://www.sunhelp.org/mailman/listinfo/=
sunhelp" TARGET=3D"_blank">http://www.sunhelp.org/mailman/listinfo/sunhelp<=
/A>
 -- 
 =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
          James D=
. Fogg, Network Engineer
         Vicinity Corp=
oration - Lebanon, NH

<P><FONT SIZE=3D2>     DESK (603) 442-1751 - CELL (603)=
 252-1864</FONT>
<BR><FONT SIZE=3D2>     PAGER (802) 742-0280 - HOME (60=
3) 526-7729</FONT>
<BR><FONT SIZE=3D2>         &n=
bsp;  EMAIL jfogg at vicinity.com</FONT>
</P>

<P><FONT SIZE=3D2>If you can read this e-mail, Thank a Network Engineer!</F=
ONT>
<BR><FONT SIZE=3D2>=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
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=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D</FONT>
<BR><FONT SIZE=3D2>_______________________________________________</FONT>
<BR><FONT SIZE=3D2>SunHELP maillist  -  SunHELP at sunhelp.org</FONT>
<BR><FONT SIZE=3D2><A HREF=3D"http://www.sunhelp.org/mailman/listinfo/sunhe=
lp" TARGET=3D"_blank">http://www.sunhelp.org/mailman/listinfo/sunhelp</A></=
FONT>
</P>

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