+ *
+ * rmt_version is 0 for regular clients (Linux included)
+ * rmt_version is 1 for extended clients (Sun especially). In this cas
+ * we support some extended commands (see below) and we remap
+ * the ioctl commands to the UNIX "standard", as per:
+ * ftp://ftp.fokus.gmd.de/pub/unix/star/README.mtio
+ *
+ * In order to use rmt version 1, a client must send "I-1\n0\n"
+ * before issuing the other I commands.