diff --git a/cdrskin/cdrskin_timestamp.h b/cdrskin/cdrskin_timestamp.h
index 020dd4a..cb214db 100644
--- a/cdrskin/cdrskin_timestamp.h
+++ b/cdrskin/cdrskin_timestamp.h
@@ -1 +1 @@
-#define Cdrskin_timestamP "2016.07.23.104100"
+#define Cdrskin_timestamP "2016.07.30.140328"
diff --git a/libburn/drive.c b/libburn/drive.c
index 521e4a6..3e17d55 100644
--- a/libburn/drive.c
+++ b/libburn/drive.c
@@ -58,6 +58,9 @@
 /* A90815 : for mmc_obtain_profile_name() */
 #include "mmc.h"
 
+/* B60730 : for Libburn_do_no_immed_defaulT */
+#include "os.h"
+
 #include "libdax_msgs.h"
 extern struct libdax_msgs *libdax_messenger;
 
@@ -88,6 +91,13 @@ int burn_setup_drive(struct burn_drive *d, char *fname)
 	d->do_stream_recording = 0;
         d->stream_recording_start= 0;
 	d->role_5_nwa = 0;
+
+#ifdef Libburn_do_no_immed_defaulT
+	d->do_no_immed = Libburn_do_no_immed_defaulT;
+#else
+	d->do_no_immed = 0;
+#endif
+
 	d->features = NULL;
 	d->drive_serial_number = NULL;
 	d->drive_serial_number_len = -1;
@@ -888,6 +898,12 @@ void burn_disc_erase_sync(struct burn_drive *d, int fast)
 #else /* Libburn_old_progress_looP */
 
 	while (1) {
+
+		/* >>> ??? ts B60730 : abort if user interrupts ?
+		if (d->cancel)
+	break;
+		*/
+
 		ret = d->get_erase_progress(d);
 		if (ret == -2 || ret > 0)
 	break;
@@ -896,6 +912,12 @@ void burn_disc_erase_sync(struct burn_drive *d, int fast)
 		sleep(1);
 	}
 	while (1) {
+
+		/* >>> ??? ts B60730 : abort if user interrupts ?
+		if (d->cancel)
+	break;
+		*/
+
 		ret = d->get_erase_progress(d);
 		if(ret == -2)
 	break;
@@ -912,7 +934,7 @@ void burn_disc_erase_sync(struct burn_drive *d, int fast)
 
 	/* ts A61125 : update media state records */
 	burn_drive_mark_unready(d, 0);
-	if (d->drive_role == 1)
+	if (d->drive_role == 1 && !d->cancel)
 		burn_drive_inquire_media(d);
 	d->busy = BURN_DRIVE_IDLE;
 	if (was_error)
@@ -3577,3 +3599,17 @@ ex:
 	return ret;
 }
 
+
+int burn_drive_set_immed(struct burn_drive *drive, int enable)
+{
+	drive->do_no_immed = !enable;
+	return 1;
+}
+
+
+int burn_drive_get_immed(struct burn_drive *drive)
+{
+	return !drive->do_no_immed;
+}
+
+
diff --git a/libburn/libburn.h b/libburn/libburn.h
index c2f8237..31c7cdd 100644
--- a/libburn/libburn.h
+++ b/libburn/libburn.h
@@ -1858,6 +1858,33 @@ void burn_disc_write(struct burn_write_opts *o, struct burn_disc *disc);
 int burn_drive_set_stream_recording(struct burn_drive *drive, int recmode,
                                     int start, int flag);
 
+
+/* ts B60730 */
+/** Enable or disable use of the Immed bit with long running SCSI commands.
+    If the Immed bit is used, then those SCSI commands end early and leave
+    the drive in not-ready state. libburn then tries periodically whether
+    the drive became ready again. Only then it assumes the command to be
+    completely done.
+    The default setting may depend on the operating system on which libburn
+    was compiled.
+    @param drive    The drive which will be affected.
+    @param enable   1= use Immed bit.
+                    0= use no Immed bit. Affected commands can last very long.
+    @return         1=success , <=0 failure
+    @since 1.4.6
+*/
+int burn_drive_set_immed(struct burn_drive *drive, int enable);
+
+
+/* ts B60730 */
+/** Inquire the current setting of usage of the Immed bit. Either the still set
+    system dependent default or the value set by call burn_drive_set_immed().
+    @return         The current value.
+    @since 1.4.6
+*/
+int burn_drive_get_immed(struct burn_drive *drive);
+
+
 /** Cancel an operation on a drive.
     This will only work when the drive's busy state is BURN_DRIVE_READING or
     BURN_DRIVE_WRITING.
diff --git a/libburn/mmc.c b/libburn/mmc.c
index 904b45d..953f863 100644
--- a/libburn/mmc.c
+++ b/libburn/mmc.c
@@ -613,7 +613,8 @@ void mmc_close(struct burn_drive *d, int session, int track)
 	scsi_init_command(c, MMC_CLOSE, sizeof(MMC_CLOSE));
 	c->retry = 1;
 
-	c->opcode[1] |= 1; /* ts A70918 : Immed */
+	if (!d->do_no_immed)
+		c->opcode[1] |= 1; /* ts A70918 : Immed */
 
 	/* (ts A61030 : shifted !!session rather than or-ing plain session ) */
 	c->opcode[2] = ((session & 3) << 1) | !!track;
@@ -621,7 +622,10 @@ void mmc_close(struct burn_drive *d, int session, int track)
 	c->opcode[5] = track & 0xFF;
 	c->page = NULL;
 	c->dir = NO_TRANSFER;
-	c->timeout = Libburn_mmc_close_timeouT;
+	if (d->do_no_immed)
+		c->timeout = Libburn_mmc_close_noim_timeouT;
+	else
+		c->timeout = Libburn_mmc_close_timeouT;
 	d->issue_command(d, c);
 
 	/* ts A70918 : Immed : wait for drive to complete command */
@@ -2717,12 +2721,16 @@ void mmc_erase(struct burn_drive *d, int fast)
 		return;
 
 	scsi_init_command(c, MMC_BLANK, sizeof(MMC_BLANK));
-	c->opcode[1] = 16;	/* IMMED set to 1 */
+	if (!d->do_no_immed)
+		c->opcode[1] = 16;	/* IMMED set to 1 */
 	c->opcode[1] |= !!fast;
 	c->retry = 1;
 	c->page = NULL;
 	c->dir = NO_TRANSFER;
-	c->timeout = Libburn_mmc_blank_timeouT;
+	if (d->do_no_immed)
+		c->timeout = Libburn_mmc_blank_noim_timeouT;
+	else
+		c->timeout = Libburn_mmc_blank_timeouT;
 	d->issue_command(d, c);
 	if (c->error) {
 		d->cancel = 1;
@@ -3522,10 +3530,14 @@ void mmc_sync_cache(struct burn_drive *d)
 
 	scsi_init_command(c, MMC_SYNC_CACHE, sizeof(MMC_SYNC_CACHE));
 	c->retry = 1;
-	c->opcode[1] |= 2; /* ts A70918 : Immed */
+	if (!d->do_no_immed)
+		c->opcode[1] |= 2; /* ts A70918 : Immed */
 	c->page = NULL;
 	c->dir = NO_TRANSFER;
-	c->timeout = Libburn_mmc_sync_timeouT;
+	if (d->do_no_immed)
+		c->timeout = Libburn_mmc_sync_noim_timeouT;
+	else
+		c->timeout = Libburn_mmc_sync_timeouT;
 
 	libdax_msgs_submit(libdax_messenger, -1, 0x00000002,
 			   LIBDAX_MSGS_SEV_DEBUG, LIBDAX_MSGS_PRIO_ZERO,
@@ -3674,11 +3686,15 @@ int mmc_format_unit(struct burn_drive *d, off_t size, int flag)
 	c->page->bytes = 12;
 	c->page->sectors = 0;
 	c->dir = TO_DRIVE;
-	c->timeout = Libburn_mmc_blank_timeouT;
+	if (d->do_no_immed)
+		c->timeout = Libburn_mmc_blank_noim_timeouT;
+	else
+		c->timeout = Libburn_mmc_blank_timeouT;
 	memset(c->page->data, 0, c->page->bytes);
 
 	descr[0] = 0;
-	c->page->data[1] = 0x02;                  /* Immed */
+	if (!d->do_no_immed)
+		c->page->data[1] = 0x02;          /* Immed */
 	c->page->data[3] = 8;                     /* Format descriptor length */
 	num_of_blocks = size / 2048;
 	mmc_int_to_four_char(c->page->data + 4, num_of_blocks);
diff --git a/libburn/os-netbsd.h b/libburn/os-netbsd.h
index 7b10e6a..9303c7a 100644
--- a/libburn/os-netbsd.h
+++ b/libburn/os-netbsd.h
@@ -44,6 +44,14 @@
 /* The number of above list items */
 #define BURN_OS_NON_SIGNAL_COUNT 11
 
+/* ts B60730 */
+/* Either OpenBSD or SASANO Takayoshi's LG BH14NS48 throw 2,0,0
+   on Immed bit with BLANK and SYNCHRONIZE CACHE.
+   Until it is clear that the drive is to blame, the OpenBSD default is
+   not to use Immed.
+*/
+#define Libburn_do_no_immed_defaulT 1
+
 #else /* __OpenBSD__ */
 
 /** To list all signals which shall surely not be caught */
diff --git a/libburn/sbc.c b/libburn/sbc.c
index d29f167..5ddb01f 100644
--- a/libburn/sbc.c
+++ b/libburn/sbc.c
@@ -114,12 +114,15 @@ int sbc_start_unit_flag(struct burn_drive *d, int flag)
 
 	scsi_init_command(c, SBC_START_UNIT, sizeof(SBC_START_UNIT));
 	c->retry = 1;
-	c->opcode[1] |= (flag & 1); /* ts A70918 : Immed */
+	if (d->do_no_immed && (flag & 1))
+		c->timeout = 1800 * 1000;
+	else
+		c->opcode[1] |= (flag & 1); /* ts A70918 : Immed */
 	c->dir = NO_TRANSFER;
 	d->issue_command(d, c);
 	if (c->error)
 		return 0;
-	if (!(flag & 1))
+	if (d->do_no_immed || !(flag & 1))
 		return 1;
 	/* ts A70918 : asynchronous */
 	ret = spc_wait_unit_attention(d, 1800, "START UNIT", 0);
diff --git a/libburn/spc.h b/libburn/spc.h
index 7b7512e..799ffae 100644
--- a/libburn/spc.h
+++ b/libburn/spc.h
@@ -156,17 +156,23 @@ int spc_confirm_cd_drive(struct burn_drive *d, int flag);
 /* RESERVE TRACK */
 #define Libburn_mmc_reserve_timeouT          200000
 
-/* CLOSE TRACK/SESSION (with Immed bit) */
+/* CLOSE TRACK/SESSION with Immed bit */
 #define Libburn_mmc_close_timeouT            200000
+/* CLOSE TRACK/SESSION without Immed bit */
+#define Libburn_mmc_close_noim_timeouT      3600000
 
-/* BLANK , FORMAT UNIT (with Immed bit) */
+/* BLANK , FORMAT UNIT with Immed bit */
 #define Libburn_mmc_blank_timeouT            200000
+/* BLANK , FORMAT UNIT without Immed bit */
+#define Libburn_mmc_blank_noim_timeouT     18000000
 
 /* SEND OPC INFORMATION */
 #define Libburn_mmc_opc_timeouT              200000
 
-/* MMC_SYNC_CACHE */
+/* MMC_SYNC_CACHE with Immed bit */
 #define Libburn_mmc_sync_timeouT             200000
+/* MMC_SYNC_CACHE without Immed bit */
+#define Libburn_mmc_sync_noim_timeouT       3600000
 
 /* START STOP UNIT with Start bit and Load bit set */
 #define Libburn_mmc_load_timeouT             300000
diff --git a/libburn/transport.h b/libburn/transport.h
index 8f73753..55114ba 100644
--- a/libburn/transport.h
+++ b/libburn/transport.h
@@ -378,6 +378,9 @@ struct burn_drive
 	/* ts B10314 : Next Writeable Address for drive_role == 5 */
         int role_5_nwa;
 
+	/* ts B60730 */
+	int do_no_immed;
+
 	int toc_temp;
 	struct burn_disc *disc;	/* disc structure */
 	int block_types[4];