Disk Errors

Wojciech Puchar wojtek at wojtek.tensor.gdynia.pl
Sun Dec 14 14:16:59 PST 2008

> ad2: FAILURE - READ_DMA timed out LBA=0
> ad2: TIMEOUT - READ_DMA retrying (1 retry left) LBA=1
> ad2: TIMEOUT - READ_DMA retrying (0 retries left) LBA=1
> The flash drive is detected with 3940272 sectors.  Is there a way to control 
> the LBA= parameter?  Does it matter if I try?

> How can I control the number of retries?
> I read that FreeBSD doesn't use the BIOS at least for CHS.  Does FreeBSD use 
> the BIOS for PIO and UDMA modes?

try disabling dma with

set hw.ata.ata_dma=0

bootloader command

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