Re: support for marvell sata chips?

On Wed, Oct 18, 2006 at 09:18:58PM +0200, S?ren Schmidt wrote:
> Ruslan Ermilov wrote:
> >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 
> >0xfc900000-0xfc9fffff irq 20 at device 1.0 on pci2
> ># dd if=/dev/ad16 bs=128k count=1024 | md5
> >1024+0 records in
> >1024+0 records out
> >134217728 bytes transferred in 2.091913 secs (64160282 bytes/sec)
> >669aa0b8c706f06d3d41aae95d4a3cf1
> ># dd if=/dev/ad16 bs=128k count=1024 | md5
> >1024+0 records in
> >1024+0 records out
> >134217728 bytes transferred in 2.092598 secs (64139273 bytes/sec)
> >5b92918e4beaadf5a7ff74829b9ab9ce
> ># dd if=/dev/ad16 bs=128k count=1024 | md5
> >1024+0 records in
> >1024+0 records out
> >134217728 bytes transferred in 2.096472 secs (64020758 bytes/sec)
> >d56fbdee36d70c8d6fcae6ea7b7550a7
> ># 
> >
> >I'm currently looking into adding errata quirks found in the Linux
> >driver to see if that helps.  JFYI.
> >  
> Right, there are a few mentioned in the docs, however I've not been able 
> to reproduce any of them, but please let me know what you find out!!
> 
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?


Cheers,
-- 
Ruslan Ermilov
ru_at_FreeBSD.org
FreeBSD committer