SiS 5591 requires hw.ata.ata_dma=0 - Why?
adamo at central.tee.gr
Tue Aug 2 08:58:52 PDT 2005
On 2005-07-19, TomaÎ BorÎtnar <tomaz.borstnar at xxxxxxxx> wrote:
> Yiorgos Adamopoulos wrote:
>> According to ata(4) SiS 5591 is supported at its maximum speed. However,
>> unless I set hw.ata.ata_dma=0 at /boot/loader.conf.local I get:
>> ad0: READ command timeout tag=0 serv=0 - resetting
>> ata0: resetting devices ..
> broken chipset or bad cable. Nothing new :) old VIA chipsets often neeeded
> such tweaks.
Well, it cannot be a broken cable, since I changed it and I had the same
behavior. OTOH, installing Linux on the same machine has (almost) the same
result: The hard disk is started as PIO4 but when switched to UDMA5 it works
(whereas if I try this with atacontrol mode UDMA5 UDMA5) I get ata0: resetting
#define POWERED_BY "http://www.DragonFlyBSD.org/"
More information about the Bugs