--- sys/cam/scsi/scsi_da.c	2014-04-25 13:44:36.000000000 -0500
+++ sys/cam/scsi/scsi_da.c	2014-04-25 13:51:19.051644688 -0500
@@ -684,6 +684,11 @@ 
 		{T_DIRECT, SIP_MEDIA_REMOVABLE, "JetFlash", "Transcend*",
 		 "*"}, /*quirks*/ DA_Q_NO_RC16
 	},
+	{
+		/* ADATA USB sticks lie on RC16. */
+		{T_DIRECT, SIP_MEDIA_REMOVABLE, "ADATA", "USB Flash Drive*",
+		 "*"}, /*quirks*/ DA_Q_NO_RC16
+	},
 	/* ATA/SATA devices over SAS/USB/... */
 	{
 		/* Hitachi Advanced Format (4k) drives */