Robert Williams wrote:
>
> W Bauske wrote:
>
> > I've installed a Promise
> > UATA66 PCI card in it and am looking at installing
> > several large UATA66 drives. I've got 3 40GB Maxtors
> > and a 26GB Quantum for tests. One thing I noticed is
> > the Promise card doesn't work on hose 1. On hose 0,
> > it's recognized and the disks are seen.
>
> What is hose 1 and 0? PCI slots?
> Take a look at /proc/pci, and the IRQs listed there.
> I posted recently about what appeared to be conflicts there.
>
They are PCI bus 0 and 1. UP2K's and most EV6/67 machines
have more than one PCI bus.
> > Another thing that's interesting is that whether I use a
> > disk on the Cypress 82C693 or the Promise card, the
> > performance is not at all good. I get at most 4.3MB/sec
> > using drives I know are capable of 15-28MB/sec on x86
> > boxes.
>
> I'm getting 21 MB/sec (hdparm -T -t) sustained on the
> on-board AL UDMA33 with a 7500 RPM 13 Gig Maxtor,
> and 17 MB/sec with a 5000 RPM 40 Gig Maxtor, but
> again that's with the on-board 33.
>
That gives me a data point for a 40GB Maxtor at UATA33. Thanks.
> > I need to run SMP and the Promise needs to run/recognize
> > the IDE drives correctly. That's my main interest in 2.3.xx.
>
> You might try the latest Unified IDE patches on 2.2.14, but
> again, I had problems with my UP1000, not related much to
> the UP2000.
>
I have the DMA patches installed on 2.2.14 already.
DMA is working, it's just horribly slow, relative to
what I've seen on x86's. I have DS10's using the DMA
patch that perform fairly well, around 15MB/sec.
I'm wondering if the IDE-DMA code sinks to the lowest
common denominator when you have say, an EIDE chipset,
and a UATA66, it sticks to EIDE speeds even though the
other card is faster. Need to do some looking around
in the driver code.
Wes
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