It seems Wes Morgan wrote:
>
> ad0: <ST32140A/08.08.04> ATA-? disk at ata0 as master
> ad0: 2015MB (4127760 sectors), 4095 cyls, 16 heads, 63 S/T, 512 B/S
> ad0: 16 secs/int, 0 depth queue, DMA
> ad1: <WDC AC418000D/J78OA30K> ATA-4 disk at ata0 as slave
> ad1: 17206MB (35239680 sectors), 34960 cyls, 16 heads, 63 S/T, 512 B/S
> ad1: 16 secs/int, 31 depth queue, DMA
>
> The motherboard is fairly old and does not support ATA/66 etc, and the
> drive with the fat fs has been rock solid so I doubt it has suddenly gone
> bad. I'd like to test this with DMA turned off, what flags will disable
> that?
OK, I'd like to see the rest of the dmesg, from a verbose at best, before
saying anything conclusive, but it looks like the Seagate dont like DMA.
There are currently no flags to control the DMA/PIO behavior, the driver
relies on the hardware to tell the truth. This might change though...
-Søren
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