Re: 2.1.111: IDE DMA disabled?

Alan Cox (
Mon, 27 Jul 1998 00:42:52 +0100 (BST)

> Some early 1.7GB drives had UDMA trouble if driven by a 83mhz bus but
> considering that is REALLY overclocking the drive (and chipset), it's not
> really much on an issue.

If you are driving your PCI bus at 83Mhz/3 not 33Mhz then you are doing as
bad if not worse than a cpu overclock and deserve what you get

> FWIW, I'm running a 6.4G and a 1.7G IBM drive at 83mhz currently with no
> trouble.. ;-)

If your board is doing 83Mhz/33Mhz thats fine anyway

> VXPro, and TXPro seem to have trouble but these are bottom of the
> barrel-piece-of-shit chipsets that should have never been made and prolly
> don't even do PIO Mode 4 correctly. Simplex...crapex..

And we don't do simplex DMA

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