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    SubjectRe: sata_nv issues with MCP51 SATA controller
    Jon Ivar Rykkelid wrote:
    >
    > Hi, I'm resending (didn't see my first attempt appear on the maillist):
    >
    >
    >
    > I'm having serious disk-issues when using the on-board nvidia controller
    > for my HDDs (My motherboard is a Gigabyte GA-N650SLI-DS4 with nvidia
    > chipset, cpu is intel Core2Quad)
    >
    > excerpt from "lspci":
    > 00:0d.0 IDE interface: nVidia Corporation MCP51 IDE (rev a1)
    > 00:0e.0 IDE interface: nVidia Corporation MCP51 Serial ATA Controller
    > (rev a1)
    > 00:0f.0 IDE interface: nVidia Corporation MCP51 Serial ATA Controller
    > (rev a1)
    >
    > I have a normal IDE/P-ATA-disk attached to the "IDE"-controller and that
    > works fine (/dev/hda)
    >
    > However, any number of disks (I have tried 2 and 4) connected to the
    > SATA-controller(s), will eventually fail. - See attached log (excerpt /
    > anything relevant from /var/log/messages)
    >
    > At first, disks were REALLY unstable, but then I disabled S.M.A.R.T.
    > (both in BIOS and Linux), and I updated from the CentOS5 (equivalent of
    > RHEL5) kernel (2.6.18) to the latest (at that time) official kernel from
    > kernel.org:
    >
    > > uname -a
    > Linux mirakel 2.6.22.5-custom_jir #2 SMP Thu Aug 30 22:06:21 CEST 2007
    > i686 i686 i386 GNU/Linux
    >
    > Now it will normally take a day or two before SATA crashes, so things
    > are better, but still rather useless.
    >
    > First error when sata_nv get into problems is always:
    > "exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x2 frozen"
    > (as shown in the attached log-file.) - when this happens to one device,
    > it'll almost instantly happen to the other disk attached to that
    > controller as well. A couple of minutes (or so) later, the disk(s)
    > connected to the other controller will start acting up as well (in the
    > same manner). - I/O freezes, and nothing helps except a reboot...
    >
    > As I run a rather large (software / md) RAID-5 disk array on this server
    > (I'm doing a bit of video editing), every crash means a time-consuming
    > rebuild of the disk-array...
    >
    > I have given up on the sata_nv / nvidia-controllers for the time being.
    > I now resort to some old PCI-connected sata-controllers which work fine
    > (but slow, as they are outdated and "overloaded").
    >
    > So, if anyone has a good solution / suggestion / improved driver (over
    > the one supplied with the official 2.6.22.5-kernel) I am eager to give
    > it a go and see if the situation can be resolved.

    does adma=0 module option do anything?

    Jeff



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