[Bug 195349] CAM status: Command timeout since upgrade to 10.1

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=195349

--- Comment #11 from je.broman at gmail.com ---
I tested the workaround 

echo 'hint.ahci.0.msi="0"' >> /boot/loader.conf
shutdown -r now

This is my zpool. 
# zpool list

NAME    SIZE  ALLOC   FREE   FRAG  EXPANDSZ    CAP  DEDUP  HEALTH  ALTROOT
data   3.62T  1.56T  2.06T     6%         -    43%  1.00x  ONLINE  -

 pool: data
 state: ONLINE
  scan: scrub repaired 0 in 3h9m with 0 errors on Thu Dec  4 11:55:29 2014
config:

        NAME        STATE     READ WRITE CKSUM
        data        ONLINE       0     0     0
          raidz1-0  ONLINE       0     0     0
            ada0    ONLINE       0     0     0
            ada1    ONLINE       0     0     0
            ada2    ONLINE       0     0     0
            ada3    ONLINE       0     0     0
        cache
          ada4p4    ONLINE       0     0     0

errors: No known data errors

After the reboot I'm able to run a full zpool scrub without any error messages
or problems. The workaround seems to work - great! Thank you!

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