Kernel Dump when accessing second drive

Dylan Reinhold dylan at
Sun May 23 12:24:02 PDT 2010

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?
     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
					Matthew Dillon
					<dillon at>
Here is the complete dmesg from the last crash

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