In the last episode (Dec 09), [EMAIL PROTECTED] said:
> I have a Pentium 533 MHz machine with 2 hard drives (10GB and 2GB).
> Both drives are manufactured by Fujitsu. The Bios detects that the
> first drive uses UDMA 4 and the second drive uses UDMA 2. When I run
> hdparm tests on the drives with DMA turned on, my whole system
> freezes up but the tests run fine on the second drive. In addition,
> hdparm -i doesn't list UDMA-4 as one of the DMA modes for the first
> drive. Now that I have given you the scenario, I would like to ask
> you how can I disable the DMA check during FreeBSD installation as it
> seems to be causing a fatal trap exception during the DMA check?
Right at the bneginning of the boot process, you'll see a line that
says:
Hit [Enter] to boot immediately, or any other key for command prompt.
Hit space there, then at the prompt, enter "set hw.ata.ata_dma=0", then
enter "boot" to continue the boot process. Once the system is
installed, edit (or create) the file /boot/loader.conf and put the line
"hw.ata.ata_dma=0" in it. That should keep FreeBSD from trying to use
DMA mode on the hard drives. You might want to check your cabling
setup and BIOS versions, though. A DMA test shouldn't lock up the
system.
--
Dan Nelson
[EMAIL PROTECTED]
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