3515 sd gives RMW warnings for reads
Reviewed by: Albert Lee <trisk@nexenta.com>
Reviewed by: Kevin Crowe <kevin.crowe@nexenta.com>
Reviewed by: Gordon Ross <gordon.ross@nexenta.com>
Reviewed by: Garrett D'Amore <garrett@damore.org>
Approved by: Richard Lowe <richlowe@richlowe.net>