Date: Thu, 7 Feb 2008 15:40:24 +0000 From: Anton Shterenlikht <mexas@bristol.ac.uk> To: ticso@cicely.de Cc: freebsd-alpha@freebsd.org Subject: Re: DS10L - "processor correctable error" Message-ID: <20080207154024.GA9605@mech-aslap33.men.bris.ac.uk> In-Reply-To: <20080207145311.GF24583@cicely12.cicely.de> References: <20080206121738.GA91825@mech-aslap33.men.bris.ac.uk> <20080207145311.GF24583@cicely12.cicely.de>
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On Thu, Feb 07, 2008 at 03:53:12PM +0100, Bernd Walter wrote: > On Wed, Feb 06, 2008 at 12:17:38PM +0000, Anton Shterenlikht wrote: > > > > "Warning: received processor correctable error." > > > > What is the meaning of this warning? Something wrong with hardware? > > This is an ECC memory correction. > It is OK to see it once in a while, since even 100% working DRAM has > failures from time to time (called softerror rate) - therefor the need > to have ECC in important systems > If however you see a lot of them it is time to replace the faulty > memory. Bernd, thank you. Can I know which DIMM (DS10L has 2 DIMMs) is faulty? If I run SRM memexer I get: >>>show_status ID Program Device Pass Hard/Soft Bytes Written Bytes Read -------- ------------ ------------ ------ --------- ------------- ------------- 00000001 idle system 0 0 0 0 0 000003ab memtest memory 6 0 0 5586812928 5586812928 >>> Processor correctable error through vector 630. Machine Check Logout Frame @ 0x6000 Code = 0x86 Alpha 21264 IPRs (CPU 0): I_STAT: 0000000000000000 DC_STAT: 000000000000000C C_ADDR: 00000000296287C0 DC1_SYNDROME: 0000000000000000 DC0_SYNDROME: 000000000000008F C_STAT: 0000000000000003 C_STS: 000000000000000A MM_STAT: 0000000000000000 >>> The message appears approx. once every other pass. The address is always the same. thanks anton -- Anton Shterenlikht Room 2.6, Queen's Building Mech Eng Dept Bristol University University Walk, Bristol BS8 1TR, UK Tel: +44 (0)117 928 8233 Fax: +44 (0)117 929 4423
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