DragonFly BSD
DragonFly kernel List (threaded) for 2010-05
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Re: Kernel Dump when accessing second drive


From: Dylan Reinhold <dylan@xxxxxxxxxxxxxxxx>
Date: Sun, 23 May 2010 12:19:24 -0700

On 05/23/2010 09:26 AM, Matthew Dillon wrote:
:It still crashed, but I'm not sure it is taking the command.
:
:# natacontrol mode ad6 PIO4
:current mode = SATA150
:
:Is that correct for it to still report SATA150?
:
:Thanks,
:Dylan

     The UDMA/PIO stuff might not be adjustable if its a SATA controller
     emulating an IDE controller.

     I think what is happening here is the NATA driver is detaching the
     drive and destroying the related dev structures before it finishes
     cleaning out any pending I/O's, so then when it tries to ad_done()
     the request it winds up blowing through dead structures.

     There must be some error messages reported in the console output
     that we haven't seen yet.  You can try:

dmesg -N kern.0 -M vmcore.0

     And see if any other messages above the 'ad6: FAILURE' message are
     present.

					-Matt
					Matthew Dillon
					<dillon@backplane.com>

Here is the complete dmesg from the last crash
http://leaf.dragonflybsd.org/~dylan/dmesg.18.txt

Thanks,
Dylan




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