DS10L - "processor correctable error"
Bernd Walter
ticso at cicely12.cicely.de
Thu Feb 7 08:21:32 PST 2008
On Thu, Feb 07, 2008 at 03:40:24PM +0000, Anton Shterenlikht wrote:
> 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?
Unfortunately not.
IIRC Tru64 and VMS have support for this, but we never had enough
information to handle this and this is board specific as well.
> 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.
Don't be worried too much about this.
Alphas are using the memory in pairs and can correct multiple faulty
bits in a single dataword.
However - you could try to remove and reconnect the Modules, since it
can happen that a contact isn't good after that many years.
--
B.Walter http://www.bwct.de http://www.fizon.de
bernd at bwct.de info at bwct.de support at fizon.de
More information about the freebsd-alpha
mailing list