Hard drive problem... S-ATA/ATA and DMA error messages

[Warren Block]

On Tue, 6 Jul 2004, Rickard [ISO-8859-1] Borgmäster wrote:

> atapci1: <VIA 8237 ATA133 controller> port 0xfc00-0xfc0f at device 15.1 on
> pci0
> ata0: at 0x1f0 irq 14 on atapci1
> ata1: at 0x170 irq 15 on atapci1
> [...]
> ad0: 156334MB <Maxtor 6Y160P0> [317632/16/63] at ata0-master UDMA133
> ad4: DMA limited to UDMA33, non-ATA66 cable or device
> ad4: 152627MB <ST3160023AS> [310101/16/63] at ata2-master UDMA33
>
> How come FreeBSD kernel thinks my S-ATA disk is only capable of UDMA/33?

FreeBSD 4.x doesn't have specific support for the VIA 8237, and so 
doesn't properly realize that it should be able to do the faster DMA 
modes.

> Next thing is that I today tried to move ~70GB of data from ad0
> (ATA/UDMA133) to ad4 (S-ATA) disk. During the cp process I got these
> messages:
> Jul  5 15:13:18 <kern.crit> studsboll /kernel: ad0s1e: hard error reading
> fsbn 390440063 of 195220000-195220255 (ad0s1 bn 390440063; cn 24303 tn 196
> sn 20) trying PIO mode
> Jul  5 15:13:18 <kern.crit> studsboll /kernel: ad0: DMA problem fallback
> to PIO mode

My MSI motherboard with the same VIA 8237 does the same thing.

-CURRENT (5.x) does have support for SATA, and may (probably does) 
work with the 8237.  (I haven't tried it on this motherboard.)

-Warren Block * Rapid City, South Dakota USA