Re: Kernel Dump when accessing second drive

[Dylan Reinhold]

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
                                        <dil...@backplane.com>

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

Thanks,
Dylan