--- /usr/src/sys/cam/scsi/scsi_da.c.orig	2008-11-16 14:06:37.000000000 +0800
+++ /usr/src/sys/cam/scsi/scsi_da.c	2008-11-22 16:41:43.000000000 +0800
@@ -546,6 +546,14 @@
 	{
 		{T_DIRECT, SIP_MEDIA_REMOVABLE, "Netac", "OnlyDisk*",
 		 "2000"}, /*quirks*/ DA_Q_NO_SYNC_CACHE
+	},
+	{
+		/*
+		 * Doesn't like the synchronize cache command.
+		 * Seagate Barracuda 7200.11 1TB disk via USB
+		 */
+		{T_DIRECT, SIP_MEDIA_FIXED, "ST310003*", "*", "*"},
+		/*quirks*/ DA_Q_NO_SYNC_CACHE
 	}
 };