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    SubjectRe: sata_mv important note
    On 1/17/06, Sebastian Kuzminsky <seb@highlab.com> wrote:
    > Arkadiusz Miskiewicz <arekm@pld-linux.org> wrote:
    > > On Tuesday 17 January 2006 17:24, Sebastian Kuzminsky wrote:
    > > > Jeff Garzik <jgarzik@pobox.com> wrote:
    > > > > For sata_mv users, you should be aware of three things:
    > > > >
    > > > > 1) The Marvell driver is experimental, and not yet considered ready for
    > > > > production use. As Kconfig notes: HIGHLY EXPERIMENTAL.
    > > >
    > > > Right, understood.
    > >
    > > I'm using:
    > >
    > > 03:03.0 SCSI storage controller: Marvell Technology Group Ltd. MV88SX6041=20
    > > 4-port SATA II PCI-X Controller (rev 07)
    > >
    > > but with http://www.keffective.com/mvsata/FC3/mvSata-3.4.2a-patched.tbz driver
    > > and it works nicely (+ 2.8GHz Xeon HT, smp kernel). I was quite suprised to
    > > see that there are no problems with it in typical usage (while I'm sure that
    > > this driver is far away from kernel standards).
    >
    > I'm using:
    >
    > 0000:02:01.0 IDE interface: Marvell Technology Group Ltd. MV88SX6081 8-port SATA II PCI-X Controller (rev 09)
    >
    > I'm running the stock 2.6.15 kernel & the in-kernel driver. I have four
    > disks on this controller. The controller and disks seem perfectly stable,
    > I've been running four parallel "badblocks -n" processes (one on each
    > disk) for almost 5 days now. Using the disks as PVs in LVM works fine,
    > and building a RAID-6 out of them also works fine.
    >
    > But when I build a RAID-6 out of them, and use the array as a PV
    > for LVM, the system locks up within seconds (no errors, no sysrq,
    > no CapsLock-blinky, no network-pingy). This behavior is perfectly
    > repeatable.

    Have you tried using "nmi_watchdog=1" kernel parameter?

    > The problem goes away and everything works if I turn on all the debugging
    > options in the kernel config (but I dont get any debug output from
    > the kernel).

    Could you find the specific option which makes the hang go away?

    Bartlomiej
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