Re: support for marvell sata chips?

=?ISO-8859-1?Q?S=F8ren_Schmidt?= wrote:
> Ruslan Ermilov wrote:
> > On Wed, Oct 18, 2006 at 09:18:58PM +0200, S?ren Schmidt wrote:
> >  =20
> >> Ruslan Ermilov wrote:
> >>    =20
> >>> BTW, we're having data corruption issues when using Marvell 88SX6081:
> >>>
> >>> # dmesg |grep ^ad16
> >>> ad16: 476940MB <HDS725050KLA360 K2AOAB0A> at ata8-master SATA150
> >>> # dmesg | grep ^ata8
> >>> ata8: <ATA channel 6> on atapci0
> >>> # dmesg | grep ^atapci0
> >>> atapci0: <Marvell 88SX6081 SATA300 controller> port 0x9800-0x98ff mem=
> =20
> >>> 0xfc900000-0xfc9fffff irq 20 at device 1.0 on pci2
> >>> # dd if=3D/dev/ad16 bs=3D128k count=3D1024 | md5
> >>> 1024+0 records in
> >>> 1024+0 records out
> >>> 134217728 bytes transferred in 2.091913 secs (64160282 bytes/sec)
> >>> 669aa0b8c706f06d3d41aae95d4a3cf1
> >>> # dd if=3D/dev/ad16 bs=3D128k count=3D1024 | md5
> >>> 1024+0 records in
> >>> 1024+0 records out
> >>> 134217728 bytes transferred in 2.092598 secs (64139273 bytes/sec)
> >>> 5b92918e4beaadf5a7ff74829b9ab9ce
> >>> # dd if=3D/dev/ad16 bs=3D128k count=3D1024 | md5
> >>> 1024+0 records in
> >>> 1024+0 records out
> >>> 134217728 bytes transferred in 2.096472 secs (64020758 bytes/sec)
> >>> d56fbdee36d70c8d6fcae6ea7b7550a7
> >>> #=20
> >>>
> >>> I'm currently looking into adding errata quirks found in the Linux
> >>> driver to see if that helps.  JFYI.
> >>> =20
> >>>      =20
> >> Right, there are a few mentioned in the docs, however I've not been ab=
> le=20
> >> to reproduce any of them, but please let me know what you find out!!
> >>
> >>    =20
> > By removing the riser card I can no longer easily reproduce
> > the corruption but colleagues said it's still reproduceable
> > even without the riser card.  I'm doing more testing now,
> > but so far I couldn't reproduce it.  I tried several riser
> > cards, two different models, the issue is still the same;
> > reading 10 sectors gives one bit error (MSB bit) at one
> > byte.  Do you have experience why using riser cards may be
> > a bad idea?
> >  =20
> Hmm, I've seen bad behavior with PCI-X riser cards, I guess its because=20
> of poor design and the high speeds that the problems occur.
> Not much to do about it other than finding one that works or lowering=20
> the PCI-X bus speed.

Out of interest, are these "active" or "passive" risers?  I have
several systems each with 6 slots on 2 risers.  3 on a passive
backplane and 3 on the active backplane.  I've only ever used the
active backplane and I've never noticed any issues.

Ian

--
Ian Freislich