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

[Fletcher, Joe]

Sorry. "Design flaw" is probably a bit harsh. Call it a feature instead.


-----Original Message-----
From: Fletcher, Joe [mailto:joe.fletcher at Metapack.com]
Sent: 28 December 2001 09:38
To: 'sunhelp at sunhelp.org'
Subject: 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
> 
> =====
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Clerkenwell 
London EC1R 4PF 
Tel: +44 (0) 20 7843 6720 
Fax: +44 (0) 20 7843 6721
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