I've had my share of problems with this drive's DMA abilities. I'm
convinced that it has none... even though it probes as such.
ad0: <NEC Coporation DSE2550A/5DE0314> ATA-0 disk at ata0 as master
ad0: ...
ad0: 16 secs/int, 1 depth queue, DMA
now... when I boot -v, I don't have a chance to write down what it
says, but it will hang every time with the following output:
ad0: ad-timeout: lost disk contact
ata0: resetting drives -- mask=03 status0=50 status1=50 ..
And that's it. It never prints out "done" which I see in many of the
list messages. Is there a way of disabling DMA on a specific drive?
I read a bit of the source, but didn't find any obvious documentation
on the issue.
(This is all on a kernel compiled from a cvsup this afternoon)
Dave.
--
============================================================================
|David Gilbert, Velocet Communications. | Two things can only be |
|Mail: [EMAIL PROTECTED] | equal if and only if they |
|http://www.velocet.net/~dgilbert | are precisely opposite. |
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