fvdl@wasabisystems.com (Frank van der Linden) writes:
> Actually, I would currently recommend against this. The VIA chipset
> (certainly rev 0x40, which is the 686B) is known to have problems
> with multiple devices doing bus master DMA simultaneously. 2 drives
> on the same channel should be ok, but there have been well-published
> reports (not just on NetBSD) of file system corruption with heavier
> use of 2 disks on seperate channels.
> 
> Your A7V board may or may not show the problem, but I wouldn't
> take the risk.

I can confirm that the plain A7V (not A7V133) has problems with
hot-n-heavy I/O on the two Via-686A channels.  If I run my CD's in
audio mode at the ~10x normal rate from channel 1 to disk on channel 0
I get hangs/locks-ups.

        VIA: Vaguely Interfering Architecture

-wolfgang
-- 
       Wolfgang Rupprecht <wolfgang+gnus@dailyplanet.wsrcc.com>
		    http://www.wsrcc.com/wolfgang/
Coming soon: GPS mapping tools for Open Systems. http://www.gnomad-mapping.com/