> > Just last night i got them working fine with (2.2.12 through to
> > 2.2.15)
> > + ide patch on my dual celeron bp6 using 5 drives, 1 from and intel
> > channel, 2 from the onboard hpt366 and 2 from the pci hpt366.
> [Adrian Head] Would you be kind enough to tell be which
> versions of patches for which kernel.
I got it working with the official kernel, and the latest ide patch for
each kernel.
> >
> > If you are getting DMA timeouts, you make sure you HAVE NOT select the
> > HPT366 Fast Interrupts option, this will actually make casue DMA
> > timeouts.
> [Adrian Head] I cannot remember seeing this option but I will
> go back and have another look
>
Cables can be a cause of problems, personally i think udma66 causes too
many problems to worry about, im using UDMA33 mode only, i flashed my
drives to udma33 mode and changed the cables to regular cables.
I have one udma66 cable that causes garbage to be displayed when the
hpt366 detect the drives.... the controller must be getting corrupt
data.
I suspect this is what caused me to loose one of my LVM partitions.
> > Check you havent selected the evil the evil fast interrupt option,
> > check
> > you have selected shared interrupts (if its there?), try and get it
> > working correctly without raid, load your drives up individually by
> > using cat.
> [Adrian Head] Individually the drives are fine - I can abuse
> them as much as I like. I get transfer rates of about 20-25Mb/s - slow
> but acceptable.
>
There has been some recent discussion on the linux kernel mailing list
about io performance, disk io has been slowing down for the last few
kernels.
Make sure you load your drives up all at once, so they are all reading
(or writting if you have the space) concurrently.
A while back i was getting much better speed writting to an individual
disk than reading from that same disk. Its strange some of the things
that happen.
> > Once you have the underlying structure working adding raid should
> > cause
> > no problems. (i hope)
> [Adrian Head] It is once I add the raid stuff that the problem
> occurs :-(
>
Duoh, that means i have more headaches to come.. ill try and do some
tests today.
Glenn
