Re: DS10L - "processor correctable error"

Anton Shterenlikht <[email protected]>
Newsgroups gmane.os.freebsd.devel.alpha
Message-ID <[email protected]>
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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