[SunHELP] Warning: [AFT1] EDP event on CPU11

[DAUBIGNE Sebastien - BOR SDaubigne@bordeaux-bersol.sema.slb.com]

This feature is available in Solaris 2.6 since the 105181-23 kernel patch.
The kernel will also try to reboot cleanly instead of panicing.

(from 105181-23)

4269582 Kernel (and OBP) handling of Ecache data and Tag parity errors
should be enhanced
4320394 scrubbing the cache may improve the reliability of some systems

It seems SUN has released a newer version of the Ultra II with ECC cache,
which
avoids EDP events. They offered us to replace the 18 Ultra II CPUs in our
E6500 with
this new model, after we meet 6 EDP events in only one year.

Maybe Michael could ask SUN technical support to do the same, as this is
clearly
a design flaw.

---
Sebastien DAUBIGNE
sebastien.daubigne at sema.fr <mailto:sebastien.daubigne at sema.fr>  - (+33)
(0)5.57.26.56.36
Sema Global Services - AFM/DW/Pessac

	-----Message d'origine-----
	De:	Fletcher, Joe [SMTP:joe.fletcher at Metapack.com]
	Date:	vendredi 28 dicembre 2001 10:38
	@:	'sunhelp at sunhelp.org'
	Objet:	RE: [SunHELP] Warning: [AFT1] EDP event on CPU11

	There's a minor design flaw in the UltraII CPU. They used parity
instead of
	ECC memory in the cache. While this detects errors it can't fix them
so the
	system panics. The workaround is a cache scrubber routine which in
effect
	flushes the cache on a regular basis and causes it to be refreshed.
This
	reduces the frequency of errors and therefore crashes.


	-----Original Message-----
	From: Michael Karl [mailto:mk at lexcom-net.de]
	Sent: 28 December 2001 09:00
	To: sunhelp at sunhelp.org
	Subject: Re: [SunHELP] Warning: [AFT1] EDP event on CPU11


	Please tell me, what is the 'scrubber patch'.

	Michael

	> Von: "thrag" <thragem at earthlink.net>
	> Antworten an: sunhelp at sunhelp.org
	> Datum: Thu, 27 Dec 2001 17:23:06 -0500
	> An: <sunhelp at sunhelp.org>
	> Betreff: RE: [SunHELP] Warning: [AFT1] EDP event on CPU11
	>
	> This is a standard ecache data parity error (EDP).  Typically
happens
	during
	> low activity when the CPU cache is not refreshed.  Can be
alleviated with
	a
	> 'scrubber patch' or a cpu replacement (with what may be called a
hardened
	> CPU).
	>
	> -----Original Message-----
	> From: sunhelp-admin at sunhelp.org
[mailto:sunhelp-admin at sunhelp.org]On
	> Behalf Of Radhika Sambamurti
	> Sent: Thursday, December 27, 2001 9:19 AM
	> To: sunhelp at sunhelp.org
	> Subject: [SunHELP] Warning: [AFT1] EDP event on CPU11
	>
	>
	> unix: WARNING [AFT1] EDP event on CPU11 Instruction access
	> at TL=0 errorID 0x0005ee0b.1850fc38
	>
	> Hello,
	> I recieved this message in the var/adm/messages file and it
	> seems like the machine rebooted?
	> Any idea what, why this happened?
	>
	> Thanks,
	> radhika
	>
	> =====
	> It's all a matter of perspective. You can choose your view by
choosing
	where
	> to stand.
	> --Larry Wall
	>
	> __________________________________________________
	> Do You Yahoo!?
	> Send your FREE holiday greetings online!
	> http://greetings.yahoo.com
	> _______________________________________________
	> SunHELP maillist  -  SunHELP at sunhelp.org
	> http://www.sunhelp.org/mailman/listinfo/sunhelp
	> _______________________________________________
	> SunHELP maillist  -  SunHELP at sunhelp.org
	> http://www.sunhelp.org/mailman/listinfo/sunhelp
	_______________________________________________
	SunHELP maillist  -  SunHELP at sunhelp.org
	http://www.sunhelp.org/mailman/listinfo/sunhelp


	MetaPack
	The Lightwell
	12/16 Laystall Street
	Clerkenwell
	London EC1R 4PF
	Tel: +44 (0) 20 7843 6720
	Fax: +44 (0) 20 7843 6721

--------------------------------------------------------------------------
	This email is confidential and proprietary;
	all information contained in it must be used only by the addressee
in
	accordance with MetaPack's terms of business and non-disclosure
agreement.
	Disclosure, copying, and distribution to, or use by, anyone other
than the
	intended recipient is strictly prohibited and may be unlawful.
	_______________________________________________
	SunHELP maillist  -  SunHELP at sunhelp.org
	http://www.sunhelp.org/mailman/listinfo/sunhelp