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SubjectRe: Single P4, many IDE PCI cards == trouble??
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I am successful in using the Tyan 2460/2466 motherboard with a 3ware 8-channel 
IDE controller and 8 WD1200 drivers, and a single WD800 IDE system drive, and
4 bt878 frame grabbers.

However, on a Gigabyte GA7VXP via 400 with Athlon 2400 MP with onboard Promise
20276 controller with 2 WD1200's and a WD800 for the system drive and 4
framegrabbers, I get IDE DMA timeouts which are a symptom for future file
system corruption. I am using the /dev/ataraid device, and have not tried
this configuration using Promise's driver which creates a /dev/sda1 SCSI
device out of it. I have tried 3ware's 7000 controller with the
kernel-included (GPL) /dev/sda driver, and it results in lower probability of
file system corruption.

On Sunday 31 August 2003 08:43 am, Hans-Peter Jansen wrote:
> Hi Nick,
>
> On Friday 29 August 2003 16:00, Nick Urbanik wrote:
> > Performance is a relatively minor issue compared with stability and
> > low cost.
> >
> > Is there _anyone_ who is using a number of ATA133 IDE disks (>=6),
> > each on its own IDE channel, on a number of PCI IDE cards, and
> > doing so successfully and reliably? I begin to suspect not! If
> > so, please tell us what motherboard, IDE cards you are using. I
> > used to imagine that a terabyte of RAID storage on one P4 machine
> > with ordinary cheap IDE cards with software RAID would be feasible.
> > I believe it is not (although I cannot afford to play musical
> > motherboards).
>
> It is. I'm running several pretty stable systems with IDE SW RAID 5
> on top of Promise TX2/100 (~30 Eur) controllers. There was a long
> standing limit of two cards from this type, which seems to be removed
> lately (as Alan stated). At least, the test system hasn't fallen on
> it's face, when adding a third controller, and attached devices acted
> as expected without freezing, throwing DMA errors, and the like.
>
> Of course, the usual "don't buy the latest and greatest hardware,
> if the manufacturer isn't fully commited to linux support" applies.
> Promise isn't!
>
> Pete
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