On 17 Oct 1999 12:55:00 -0500, Tom Javen wrote:
>
>I got the same problem here with 20G IBM , seems that my motherboard (asus
>p5a) with acer chipset has some problems on ultra dma .

Same here with a Quantum Fireball except it appears to work fine once it
downshifts:

| wd1 at pciide0 channel 1 drive 0: <QUANTUM FIREBALL CX6.4A>
| wd1: drive supports 16-sector pio transfers, lba addressing
| wd1: 6149MB, 13328 cyl, 15 head, 63 sec, 512 bytes/sect x 12594960 sectors
| wd1: 32-bits data port
| wd1: drive supports PIO mode 4, DMA mode 2, Ultra-DMA mode 4, 
    Ultra-DMA mode 3, Ultra-DMA mode 2
...
| wd1a: DMA error reading fsbn 64 of 64-67 (wd1 bn 127; cn 0 tn 2 sn 1),
   retrying
| wd1: soft error (corrected)
| wd1a: DMA error reading fsbn 16 of 16-31 (wd1 bn 79; cn 0 tn 1 sn 16),
   retrying
| wd1: soft error (corrected)
| root file system type: ffs
| wd1a: DMA error reading fsbn 64 of 64-79 (wd1 bn 127; cn 0 tn 2 sn 1),
   retrying
| wd1: soft error (corrected)
| wd1a: DMA error reading fsbn 106352 of 106352-106367 (wd1 bn 106415;
   cn 112 tn 9 sn 8), retrying
| wd1: soft error (corrected)
| wd1a: DMA error reading fsbn 107200 of 107200-107215 (wd1 bn 107263;
   cn 113 tn 7 sn 37), retrying
| wd1: transfer error, downgrading to DMA mode 2
| wd1(pciide0:1:0): using PIO mode 4, DMA mode 2 (using DMA data transfers)
| wd1a: DMA error reading fsbn 107200 of 107200-107215 (wd1 bn 107263; 
   cn 113 tn 7 sn 37), retrying