Re: MCP55 SATA data corruption in FreeBSD 7

[Søren Schmidt]

Hi




Please try the attached patch, or even better try a -current kernel.

-Søren

OK, the only "modern" nVidia board I have is MCP51 based, however it uses the same codepath as the MCP55. Anyhow, there has been fixes fro these in -current, thats not in any of the releng's yet.

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Description: Binary data

On 1Jul, 2008, at 11:01 , Daniel Eriksson wrote:

I am having problems with silent data corruption on (some) drives
connected to an MCP55 SATA controller.


chipset, the other has 570 SLI. Both chipsets have the MCP55 SATA
controller.

The server with 570 Ultra chipset has a bunch of older 250GB SATA-150
drives hooked up to the MCP55 controller and it is working just fine.
The server with 570 SLI chipset has a bunch of new SATA-300 drives
hooked up to the MCP55 controller and it is giving me silent data

new checksum errors show up). I know the drives are good because when
they are hooked up to another controller they work just fine.

Unfortunately the drives does not have a jumper for setting SATA-150

SATA-150 speed with the "patch" provided by the manufacturer does not

get my hands on another older SATA-150 drive (or a new that can be

the interface speed.


NOT working (570 SLI)
---------------------
[EMAIL PROTECTED]:0:5:0:     class=0x010185 card=0x72501462 chip=0x037f10de
rev=0xa2 hdr=0x00
   vendor     = 'Nvidia Corp'
   device     = 'MCP55 SATA Controller'
   class      = mass storage
   subclass   = ATA

Working (570 Ultra)
-------------------
[EMAIL PROTECTED]:0:5:0:     class=0x010185 card=0xcb8410de chip=0x037f10de
rev=0xa3 hdr=0x00
   vendor     = 'Nvidia Corp'
   device     = 'MCP55 SATA Controller'
   class      = mass storage
   subclass   = ATA

This is most likely related to kern/120296

I have two servers, both running RELENG_7_0/amd64. One has the 570 Ultra corruption (easily detectable by running ZFS scrub, every time I run it speed (they are Samsung 1 TB drives), and trying to force the drives to seem to work (the drives still negotiate SATA-300 speed). I will try to jumpered) to verify if the culprit is the MCP55 revision (see below) or (http://www.freebsd.org/cgi/query-pr.cgi?pr=kern/120296) and kern/ 121396

(http://www.freebsd.org/cgi/query-pr.cgi?pr=kern/121396).



to SATA-150 makes a difference. It will most likely take me a while
before I can verify this.

---
Daniel Eriksson (http://www.toomuchdata.com/)

If someone else is having data corruption problems with drives connected to an MCP55 controller it might be worth testing if limiting the drives

-Søren







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