Date: Mon, 14 Apr 2003 16:30:25 +0200 (CEST) From: Riccardo.Veraldi@fi.infn.it To: freebsd-alpha@freebsd.org Subject: Re: problem with UDMA mode on XP1000 Message-ID: <Pine.NEB.4.44.0304141629130.11804-100000@dijkstra.fi.infn.it> In-Reply-To: <Pine.NEB.4.44.0304141543040.11749-100000@dijkstra.fi.infn.it>
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and is XP1000 IDE controller worse than PIO mode 4?? seems like I Cannot make udma work with this promise. I cahnged 4 cables, no luck. I Also changed PCI Slot, the resul is KErnel crashing. IT works only if I put promise on the second PCI 64 bit slot. On the lower bottom 32 bit PCI Slot it crashes. Rick On Mon, 14 Apr 2003 Riccardo.Veraldi@fi.infn.it wrote: > > > yeah..... > thanks for sending me this reply, it's really my problem, > I tyed 3 different ATA cables, and different disks the problem always > stays. > With a SAMSUNG ata100 disk I Even had a kernel crash. > I'll try some different cable... > > for curiosity how muc hperform embedded IDE controller on XP1000, is it > worse than UDMA 33?? > > thanks > > Rick > > > > On Mon, 14 Apr 2003, Andrew Gallatin wrote: > > > > > Riccardo.Veraldi@fi.infn.it writes: > > > > > anyone has hints how I could fix this problem? > > > > I'm re-sending something I sent a few months back when somebody else > > complained of the same problem in a miata. Miata's and xp1000 have > > the same form factor, all the the below applies: > > > > > > Why? Well, alphas are electrinically noisy, and physically cramped. > > The 500au in particular was designed by some sort of sadist who > > wanted things to look pretty and didn't give a damn how things > > worked on the inside. If I had a $1.00 for every drop of blood I > > ever lost by skinning my knuckles inserting or removing drives or > > pci cards from miatas, I'd be rich. > > > > Rant aside, ATA cables are VERY sensative to EMI noise. What's > > happening to you is that the cable is either badly twisted, running > > too close to an EMI source, or both. This is causing the transfers > > across the cable between the controller and the disk to be corrupted > > (that's the ICRC error you're seeing). This is NOT the fault of the > > software, rather its a real hardware problemn with your setup. The > > software is saving you from serious disk corruption. > > > > I suggest moving things around inside and making sure that the > > cables are kink-free and don't run close to a source of EMI noise > > (cpu, powersupply, other pci cards). This is much easier said than > > done on a miata like yours. You might also consider purchasing the > > highest quality cables you can find (I have no suggestions as to > > brand..). Maybe serial ata has better sheilding and would do > > better. I dunno. I do know that it took me 3 sets of cables and > > considerable fiddling to get ata33 to work on a UP1000. > > > > Alternatively, you could use atacontrol to force a slower mode like > > udma66 or udma33 which the cable might be more capable of handling. > > I have an old promise card in my miata which seems to handle udma33 > > OK. > > > > Good luck. You'll need it. > > > > Drew > > > > > > _______________________________________________ > freebsd-alpha@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-alpha > To unsubscribe, send any mail to "freebsd-alpha-unsubscribe@freebsd.org" >
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