[CentOS] RAM errors after kernel-update

[Ceg Ryan]

Run a memtest instead. If it fails, simply replace it.

On Tue, Oct 6, 2009 at 9:28 PM, Michael Schumacher <
michael.schumacher at pamas.de> wrote:

> Hi,
>
> I updated a server yesterday from
>
> "kernel 2.6.18-128.7.1.el5xen"  to "kernel 2.6.18-164.el5xen"
>
> After rebooting, my message log is flooded every second or so with this
> error messages:
>
> Oct  6 14:52:20 xenserver1 kernel: EDAC MC0: UE row 0, channel-a= 0
> channel-b= 1 labels "-": NON-FATAL recoverable (Branch=0 DRAM-Bank=0 Buffer
> ID = 0 RDWR=Read RAS=0 CAS=0 NON-FATAL recovera
> ble Err=0x2000 (FB-DIMM Configuration Write error on first attempt))
>
> and
>
> Oct  6 15:17:23 xenserver1 kernel: EDAC MC0: CE row 0, channel 0, label "":
> Corrected error (Branch=0 DRAM-Bank=0 RDWR=Read RAS=0 CAS=0, CE Err=0x10000
> (Correctable Non-Mirrored Demand Data E
> CC))
>
> The machine is a new Tyan S5397 mobo with 16GB Kingston RAM
> KVR667D2D4F5K2/8G
>
> Removing and replacing memory to different locations doesn't make any
> difference.
>
> After some digging, I noticed that the new kernel has added support
> for the i5400 chipset. I found some reference that the new kernel has
> this error reporting capability the old one hadn't.
>
> Question1: how many recoverable RAM errors are acceptable?
> Question2: The error appears always with the same id in the error
> message. Mobo problem?
> Question3: Are there any recommended BIOS settings to operate the RAM
> slower to see if the problem disappears?
> Question4: Any other proposals.
>
> Being located in Germany makes the "just return it to the dealer"
> proposal quite unattractive.
>
>
> best regards
> ---
> Michael Schumacher
> PAMAS Partikelmess- und Analysesysteme GmbH
> Dieselstr.10, D-71277 Rutesheim
> Tel +49-7152-99630
> Fax +49-7152-996333
> Geschäftsführer: Gerhard Schreck
> Handelsregister B Stuttgart HRB 252024
>
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