Re: sata_promise / libata defaulting to UDMA/33
Date: Thu Aug 03 2006 - 14:10:20 EST
On Thu, 03 Aug 2006 18:14:49 +0100, Alan Cox wrote
> Ar Gwe, 2006-08-04 am 00:31 +0800, ysgrifennodd Marc:
> > Hi.
> > I'm having great difficulty solving a problem I've encountered. I have a
> > Promise Fastrak TX4000 card:
> We knock things down to UDMA33 if they are on an unsuitable cable.
> The rest of the displayed data looks correct.
> > ata2: PATA max UDMA/133 cmd 0xF8ABC280 ctl 0xF8ABC2B8 bmdma 0x0 irq 137
> Controller does 133
> > ata2: dev 0 cfg 49:2f00 82:346b 83:7f01 84:4003 85:3469 86:3c01 87:4003
> > ata2: dev 0 ATA-6, max UDMA/100, 312581808 sectors: LBA48
> Devices does UDMA 100
> > <b>ata2: dev 0 configured for UDMA/33</b>
> So this appears to be a cable confusion. One thing that was fixed in
> recent patches was a bug where if the core code decided something was
> PATA but the drive setup was in fact SATA it incorrectly clipped to
> > I'm currently running kernel 22.214.171.124. In the controller's BIOS I've created 3
> > 'stripe' arrays with 1 disk per array, the BIOS shows the 3 drives as U5 (UDMA
> > mode 5 - which is UDMA/100 right?).
> > I've searched high and low but haven't found an answer to this problem. Help
> > appreciated. Please - I'm getting dismal performance.
> I think the needed patch is in 2.6.18-mm, not sure about 2.6.18-rc base.
> Jeff Garzik would be able to verify what has it merged.
Thank you. I've compiled and installed 2.6.18-rc3 and it now shows:
ata2: dev 0 configured for UDMA/100
Problem is the system locks up after a few minutes - not sure what's causing
that (no flashing keyboard LEDs so it's not a kernel panic). I'll try again
tomorrow - its very late here already!
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