diff -ur cdrdao-1.2.2.orig/dao/main.cc cdrdao-1.2.2/dao/main.cc
--- cdrdao-1.2.2.orig/dao/main.cc	2006-09-19 12:07:11.000000000 +0300
+++ cdrdao-1.2.2/dao/main.cc	2008-06-10 20:57:36.000000000 +0300
@@ -2027,6 +2027,8 @@
   }
 
   if (src == dst) {
+    // unlock src to make swaping possible
+    src->preventMediumRemoval(0);
     message(0, "Please insert a recordable medium and hit enter.");
     getc(stdin);
   }
diff -ur cdrdao-1.2.2.orig/scsilib/libscg/scsi-linux-sg.c cdrdao-1.2.2/scsilib/libscg/scsi-linux-sg.c
--- cdrdao-1.2.2.orig/scsilib/libscg/scsi-linux-sg.c	2006-09-20 13:51:11.000000000 +0300
+++ cdrdao-1.2.2/scsilib/libscg/scsi-linux-sg.c	2008-06-10 20:57:36.000000000 +0300
@@ -225,6 +225,27 @@
 #endif
 LOCAL	void	sg_settimeout	__PR((int f, int timeout));
 
+int    sg_open_excl    __PR((char *device, int mode));
+
+int
+sg_open_excl(device, mode)
+       char    *device;
+       int     mode;
+{
+       int f;
+       int i;
+       f = open(device, mode|O_EXCL);
+       for (i = 0; (i < 10) && (f == -1 && (errno == EACCES || errno == EBUSY)); i++) {
+           fprintf(stderr, "Error trying to open %s exclusively (%s)... retrying in 1 second.\n", device, strerror(errno));
+	   usleep(1000000 + 100000.0 * rand()/(RAND_MAX+1.0));
+	   f = open(device, mode|O_EXCL);
+       }
+       if (f == -1 && errno != EACCES && errno != EBUSY) {
+           f = open(device, mode);
+       }
+       return f;
+}
+
 /*
  * Return version information for the low level SCSI transport code.
  * This has been introduced to make it easier to trace down problems
@@ -407,7 +428,7 @@
 		
 		for (i = 0; globbuf.gl_pathv && globbuf.gl_pathv[i] != NULL ; i++) {
 			devname = globbuf.gl_pathv[i];
-			f = open(devname, O_RDWR | O_NONBLOCK);
+			f = sg_open_excl(devname, O_RDWR | O_NONBLOCK);
 			if (f < 0) {
 				/*
 				 * Set up error string but let us clear it later
@@ -458,7 +479,7 @@
 		for (i = 0; globbuf.gl_pathv && globbuf.gl_pathv[i] != NULL ; i++) {
 			devname = globbuf.gl_pathv[i];
 
-			f = open(devname, O_RDWR | O_NONBLOCK);
+			f = sg_open_excl(devname, O_RDWR | O_NONBLOCK);
 			if (f < 0) {
 				/*
 				 * Set up error string but let us clear it later
@@ -511,7 +532,7 @@
 			"Warning: Open by 'devname' is unintentional and not supported.\n");
 		}
 					/* O_NONBLOCK is dangerous */
-		f = open(device, O_RDWR | O_NONBLOCK);
+		f = sg_open_excl(device, O_RDWR | O_NONBLOCK);
 /*		if (f < 0 && errno == ENOENT)*/
 /*			goto openpg;*/