Symbol: MR_LOCK
usr/src/uts/common/io/scsi/targets/st.c
6166
if (st_cmd(un, SCMD_DOORLOCK, MR_LOCK, SYNC_CMD)) {
usr/src/uts/common/io/scsi/targets/st.c
7784
"%s tape\n", (count & MR_LOCK) ? "lock" : "unlock");