panic: trap: memory address not aligned in ata_prtdev() with
Nov 18 GENERIC
rwatson at freebsd.org
Mon Dec 1 19:25:57 PST 2003
On Mon, 1 Dec 2003, Thomas Moestl wrote:
> This can happen when an ATA operation times out, and is caused by an
> access to a freed structure. I have attached a workaround; IIRC sos is
> developing a more complete fix for this.
> ISTR the timeouts were caused by the fact that Blade 100s come with
> ATA66-capable disks and controllers, but a non-ATA66 (40 pin) cable, and
> that for some reason the driver check to catch this situation did not
> work. I am not seeing this on my machine because I replaced the cable
> long ago when I added another disk.
> Can you confirm that your box does only have a 40 pin cable?
Didn't get a chance to open up the box today, however, I did apply the
patch. It doesn't panic, ... but it does now hang solid.
FreeBSD/sparc64 (ray.rv.nailabs.com) (screen)
login: ad0: WARNING - WRITE_DMA recovered from missing interrupt
ad0: WARNING - READ_DMA recovered from missing interrupt
I'll reset the box and rebuild the kernel with BREAK_TO_DEBUGGER, assuming
I can keep it up that long.
Robert N M Watson FreeBSD Core Team, TrustedBSD Projects
robert at fledge.watson.org Senior Research Scientist, McAfee Research
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