Further details: The ATA drive in questions is: ad0: 114473MB <WDC WD1200JB-00DUA3> [232581/16/63] at ata0-master PIO4 The PIO4 comes from booting with 'hw.ata.ata_dma="0"'; it would otherwise be "UDMA66". Basically, if I use atacontrol to set that channel to WDMA2 or below, then I get no errors (but performance is awful). At UDMA2 I been to see "TIMEOUT - WRITE_DMA" and "TIMEOUT - READ_DMA" messages, but the system recovers. At UDMA4 and above, the kernel panics. -- Kirk Strauser "94 outdated ports on the box, 94 outdated ports. Portupgrade one, an hour 'til done, 82 outdated ports on the box."
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