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The FUA (Force Unit Access) bit forces data to be written directly to disk instead of the write cache. This prevents data from being lost if a shutdown or reset is requested immediately after a SCSI write operation. Cc: Michael D Kinney <michael.d.kinney@intel.com> Cc: Jian J Wang <jian.j.wang@intel.com> Cc: Liming Gao <liming.gao@intel.com> Cc: Zhiguang Liu <zhiguang.liu@intel.com> Reviewed-by: Liming Gao <liming.gao@intel.com> Reviewed-by: Zhiguang Liu <zhiguang.liu@intel.com> Signed-off-by: Christopher J Zurcher <christopher.j.zurcher@intel.com>