> Date: Fri, 14 Jan 2011 09:00:09 +0100 > From: Matthieu Herrb <matthieu.he...@laas.fr> > > On Wed, Jan 12, 2011 at 08:32:12PM -0500, Brad wrote: > > The following diff is ported from NetBSD (the workaround originated from > > OpenSolaris) to workaround the issue of data corruption with the ALI M5229 > > IDE chipset when using UltraDMA. Same workaround is also used by > > FreeBSD/Linux. > > This chipset is found in some sparc64 systems such as the Blade 100 and > > Netra X1. > > > > I don't have any such systems but I went digging for this being curious > > why the nasty hack was added to the kernel configs to disable UltraDMA > > to workaround this bug and thus penalizing other IDE/SATA controllers > > that could be in the same system. If you have one of the mentioned > > systems please test this. > > > > My Blade 150 which has this controller seems to survive a make build > with this.
The big question of course is whether it will survive a make build with the change that removes the restriction of only using Ultra-DMA up to mode 2, but without the fixes in pciide.c. Beware, that might actually eat your filesystem.
