Hi,

I use, at home, a pretty old i386 machine with a VT82C686A IDE
controller supported by the viaide(4) driver. It worked fine until
recently (SATA support changes ?), but now i'm experiencing some
problems ...

The machine becomes unresponsive with not so heavy disk access; by
example, while trying to create/update system building tools. At that
time, after recovering, simply getting a new xterm show that the disks
get 100% busy for a few second.

Thanks in advance,
Regards.

viaide0 at pci0 dev 7 function 1
viaide0: VIA Technologies VT82C686A (Apollo KX133) ATA66 controller
viaide0: bus-master DMA support present
viaide0: primary channel configured to compatibility mode
viaide0: primary channel interrupting at irq 14
atabus0 at viaide0 channel 0
viaide0: secondary channel configured to compatibility mode
viaide0: secondary channel interrupting at irq 15
atabus1 at viaide0 channel 1
[...]
wd0 at atabus0 drive 0: <ST380021A>
wd0: drive supports 16-sector PIO transfers, LBA addressing
wd0: 76319 MB, 155061 cyl, 16 head, 63 sec, 512 bytes/sect x 156301488 sectors
wd0: 32-bit data port
wd0: drive supports PIO mode 4, DMA mode 2, Ultra-DMA mode 5 (Ultra/100)
wd1 at atabus0 drive 1: <ST380021A>
wd1: drive supports 16-sector PIO transfers, LBA addressing
wd1: 76319 MB, 155061 cyl, 16 head, 63 sec, 512 bytes/sect x 156301488 sectors
wd1: 32-bit data port
wd1: drive supports PIO mode 4, DMA mode 2, Ultra-DMA mode 5 (Ultra/100)
wd0(viaide0:0:0): using PIO mode 4, Ultra-DMA mode 4 (Ultra/66) (using DMA)
wd1(viaide0:0:1): using PIO mode 4, Ultra-DMA mode 4 (Ultra/66) (using DMA)
atapibus0 at atabus1: 2 targets
cd0 at atapibus0 drive 0: <Pioneer DVD-ROM ATAPIModel DVD-116  012, , E1.22> cdr
om removable
cd0: 32-bit data port
cd0: drive supports PIO mode 4, DMA mode 2, Ultra-DMA mode 4 (Ultra/66)
cd1 at atapibus0 drive 1: <CD-W58E, , 6.0A> cdrom removable
cd1: 32-bit data port
cd1: drive supports PIO mode 4, DMA mode 2
cd0(viaide0:1:0): using PIO mode 4, Ultra-DMA mode 4 (Ultra/66) (using DMA)
cd1(viaide0:1:1): using PIO mode 4, DMA mode 2 (using DMA)

-- 
Nicolas Joly

Biological Software and Databanks.
Institut Pasteur, Paris.