FreeBSD 5.3b7and poor ata performance

Tue Oct 26 08:19:16 PDT 2004

John-Mark Gurney wrote:
> Yep, and I get decent performance:

could repeat the test setting udma mode to UDMA4?

> dmesg clip:
> atapci0: <VIA 82C686B UDMA100 controller> port 0xc000-0xc00f,0x376,0x170-0x177,0
> x3f6,0x1f0-0x1f7 at device 7.1 on pci0
> atapci0: Correcting VIA config for southbridge data corruption bug

hhhmmm, my dmesg doesn't print the message for the 686B data corruption bug.

> ata0: channel #0 on atapci0
> ata1: channel #1 on atapci0
> ad0: 43979MB <IBM-DTLA-307045/TX6OA60A> [89355/16/63] at ata0-master UDMA100
> Transfer rates:
>         outside:       102400 kbytes in   2.857371 sec =    35837 kbytes/sec
>         middle:        102400 kbytes in   3.561157 sec =    28755 kbytes/sec
>         inside:        102400 kbytes in   5.635770 sec =    18170 kbytes/sec
> 