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    SubjectRe: PDC20267 bug and corruption (was: Re: [BK PATCHES] ide-2.6 update)
    On Sat, 30 Oct 2004 13:47:45 +1000, CaT <cat@zip.com.au> wrote:
    > On Wed, Oct 27, 2004 at 03:51:14PM +0200, Bartlomiej Zolnierkiewicz wrote:
    > > http://bugme.osdl.org/show_bug.cgi?id=2494
    >
    > Tried it via bk7, wasn't it.
    >
    > Looks like I have found a bug relating to the pdc driver though.
    >
    > The situation is such: I have 2 HDs connected to a PDC20267 PCI card,
    > one on each channel, with a master on the primary channel and a slave on
    > the secondry channel. Accessing each drive individually causes no
    > problems at all but accessing them simultaneously (like copying data off
    > one drive onto the other) causes the IDE layer to go to hell in a hand
    > basket. I can duplicate this each and every time by doing the following:
    >
    > 1. copying a few gig from hde to hdh
    > 2. dd if=/dev/hde of=/dev/null
    > dd if=/dev/zero of=/dev/hdh
    >
    > With method #1 I get the following:
    >
    > Oct 27 00:37:39 nessie kernel: attempt to access beyond end of device
    > Oct 27 00:37:39 nessie kernel: hdh1: rw=1, want=3034756264, limit=390716802
    > Oct 27 00:37:40 nessie kernel: Aborting journal on device hdh1.
    > Oct 27 00:37:40 nessie kernel: ext3_abort called.
    > Oct 27 00:37:40 nessie kernel: EXT3-fs error (device hdh1): ext3_journal_start: Detected aborted journal
    > Oct 27 00:37:40 nessie kernel: Remounting filesystem read-only
    > Oct 27 00:37:40 nessie kernel: EXT3-fs error (device hdh1) in start_transaction: Journal has aborted

    This comes from the block layer, generic_make_request(),
    request is screwed up before it hits IDE layer.

    > With method #2, a whole lot more fun occurs. The logfile I have is big
    > (almost 400k) so I've compressed it and included it as an attachment.
    > This is with kernel 2.6.10-rc1-bk7 (no logs survived from me testing
    > this with rc1-mm2).

    Indeed, this is a lot more fun. ;)

    Is this bug new/old?

    Is it pdc202xx_old specific? Does the same havoc happen
    if you connect drives to the on-board Intel IDE controller?

    Please post /proc identify data for both drives and PCI config
    space dump for PDC20267 so someone can verify them.
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