diff --git a/src/burn_wrap.c b/src/burn_wrap.c
index 983eb67e..c98ee962 100644
--- a/src/burn_wrap.c
+++ b/src/burn_wrap.c
@@ -53,11 +53,11 @@ int isoburn_initialize(void)
 static int isoburn_welcome_media(struct isoburn **o, struct burn_drive *d,
                                  int flag)
 {
- int ret;
+ int ret, lba, nwa;
  struct burn_multi_caps *caps= NULL;
 
  ret= burn_disc_get_multi_caps(d, BURN_WRITE_NONE, &caps, 0);
- if(ret<=0)
+ if(ret<0) /* == 0 is read-only media, but it is too early to reject it here */
    goto ex;
  ret= isoburn_new(o, 0);
  if(ret<=0)
@@ -71,7 +71,6 @@ static int isoburn_welcome_media(struct isoburn **o, struct burn_drive *d,
  /* <<< A70929 : hardcoded CD-RW with fabricated -msinfo */
  caps->start_adr= 0;
  (*o)->fabricated_disc_status= BURN_DISC_APPENDABLE;
- /* is not set with MMC multi-session: (*o)->nwa= Hardcoded_cd_rw_nwA; */
 #endif
 
  if(caps->start_adr) {         /* set emulation to overwriteable */
@@ -83,7 +82,15 @@ static int isoburn_welcome_media(struct isoburn **o, struct burn_drive *d,
    }
  } else {
 
-   /* >>> recognize unsuitable media */;
+   /* >>> recognize unsuitable media (but allow read-only media) */;
+
+#ifdef Hardcoded_cd_rW
+   (*o)->nwa= Hardcoded_cd_rw_nwA;
+#else
+   ret= burn_disc_track_lba_nwa(d, NULL, 0, &lba, &nwa);
+   if(ret>0)
+     (*o)->nwa= nwa;
+#endif
 
  }
  ret= 1;
@@ -97,7 +104,7 @@ ex:
 int isoburn_drive_scan_and_grab(struct burn_drive_info *drive_infos[],
                                 char *adr, int load)
 {
- int ret, conv_ret;
+ int ret, conv_ret, drive_grabbed= 0;
  char libburn_drive_adr[BURN_DRIVE_ADR_LEN];
  struct isoburn *o= NULL;
  char msg[BURN_MSGS_MESSAGE_LEN+4096];
@@ -113,14 +120,18 @@ int isoburn_drive_scan_and_grab(struct burn_drive_info *drive_infos[],
  ret= burn_drive_scan_and_grab(drive_infos, libburn_drive_adr, load);
  if(ret<=0)
    goto ex;
+ drive_grabbed= 1;
  ret= isoburn_welcome_media(&o, (*drive_infos)[0].drive, 0);
  if(ret<=0)
    goto ex;
 
  ret= 1;
 ex:
- if(ret<=0)
-   isoburn_destroy(&o,0);
+ if(ret<=0) {
+   if(drive_grabbed)
+     burn_drive_release((*drive_infos)[0].drive, 0);
+   isoburn_destroy(&o, 0);
+ }
  return(ret);
 }