Re: PROBLEM: Slowdown for ATA/100 drive on PCI card, after 2.4.3upgrade.

["Bobby D. Bryant" <bdbryant@mail.utexas.edu>]

Dennis Bjorklund wrote:

> On Tue, 17 Apr 2001, Alan Cox wrote:
>
> > try and avoid a hardware problem. VIA have finally released an 'official'
> > fix which seems to be a lot less damaging to performance on the whole. That
> > I hope will be in 2.4.4
>
> What is this official fix? I've only seen unofficial ones (like the one in
> your ac7, or was it ac6). What are the implications of the fix
> (compabilitywise and speedwise)?
>
> I looked on via's homepage but could not find anything about this fix.
> I've very interested since I have a new mobo unopened in a box that I can
> still return and choose something with another chipset.

Notice that with 2.4.3 it *only* affects the disk on the PCI controller card; a
similar ATA/100 disk on the motherboard's controller did not experience the
slowdown.

Also, FYI, I noticed the mention of VIA fixes in the -ac7 change list, but those
changes did not cause or fix this particular problem.  The problem occurs in all
the 2.4.3's that I've tried: -ac5, -ac6, -ac7.

BTW, It's not hurting me right now, because the disk on the PCI card hasn't been
put to work yet.  I just want to make sure you guys are aware of it.

Bobby Bryant
Austin, Texas