command. A value of '0' means write-same is not supported by this
device.
-wb_lat_usec (RW)
-----------------
+wbt_lat_usec (RW)
+-----------------
If the device is registered for writeback throttling, then this file shows
the target minimum read latency. If this latency is exceeded in a given
window of time (see wb_window_usec), then the writeback throttling will start