diff --git a/cdrskin/cdrskin.c b/cdrskin/cdrskin.c
index 9169940..3237f5c 100644
--- a/cdrskin/cdrskin.c
+++ b/cdrskin/cdrskin.c
@@ -4021,7 +4021,7 @@ unsupported_with_dvd_minus_rw:;
 
 #ifdef Cdrskin_libburn_has_burn_disc_formaT
  } else if(do_format==1) {
-   burn_disc_format(drive,0);
+   burn_disc_format(drive,(off_t) 0,0);
 #endif
 
  } else {
diff --git a/cdrskin/cdrskin_timestamp.h b/cdrskin/cdrskin_timestamp.h
index ae0d926..e3b33b2 100644
--- a/cdrskin/cdrskin_timestamp.h
+++ b/cdrskin/cdrskin_timestamp.h
@@ -1 +1 @@
-#define Cdrskin_timestamP "2007.01.05.125715"
+#define Cdrskin_timestamP "2007.01.06.120551"
diff --git a/libburn/async.c b/libburn/async.c
index 73dd204..6834408 100644
--- a/libburn/async.c
+++ b/libburn/async.c
@@ -41,6 +41,7 @@ struct erase_opts
 struct format_opts
 {
 	struct burn_drive *drive;
+	off_t size;
 	int flag;
 };
 
@@ -254,14 +255,15 @@ void burn_disc_erase(struct burn_drive *drive, int fast)
 /* ts A61230 */
 static void *format_worker_func(struct w_list *w)
 {
-	burn_disc_format_sync(w->u.format.drive, w->u.format.flag);
+	burn_disc_format_sync(w->u.format.drive, w->u.format.size,
+				w->u.format.flag);
 	remove_worker(pthread_self());
 	return NULL;
 }
 
 
 /* ts A61230 */
-void burn_disc_format(struct burn_drive *drive, int flag)
+void burn_disc_format(struct burn_drive *drive, off_t size, int flag)
 {
 	struct format_opts o;
 	char msg[160];
@@ -286,6 +288,7 @@ void burn_disc_format(struct burn_drive *drive, int flag)
 		return;
 	}
 	o.drive = drive;
+	o.size = size;
 	o.flag = flag;
 	add_worker(drive, (WorkerFunc) format_worker_func, &o);
 }
diff --git a/libburn/drive.c b/libburn/drive.c
index 5ab9436..c84245f 100644
--- a/libburn/drive.c
+++ b/libburn/drive.c
@@ -470,13 +470,13 @@ void burn_disc_erase_sync(struct burn_drive *d, int fast)
 }
 
 
-void burn_disc_format_sync(struct burn_drive *d, int flag)
+void burn_disc_format_sync(struct burn_drive *d, off_t size, int flag)
 {
 	int ret;
 
 	d->cancel = 0;
 	d->busy = BURN_DRIVE_FORMATTING;
-	ret = d->format_unit(d, 0);
+	ret = d->format_unit(d, (off_t) 0, 0);
 	if (ret <= 0)
 		d->cancel = 1;
 	/* reset the progress */
diff --git a/libburn/drive.h b/libburn/drive.h
index b835633..dca49d4 100644
--- a/libburn/drive.h
+++ b/libburn/drive.h
@@ -93,6 +93,6 @@ int burn_mdata_free_subs(struct scsi_mode_data *m);
 
 
 /* ts A61230 */
-void burn_disc_format_sync(struct burn_drive *d, int flag);
+void burn_disc_format_sync(struct burn_drive *d, off_t size, int flag);
 
 #endif /* __DRIVE */
diff --git a/libburn/libburn.h b/libburn/libburn.h
index b20a899..7339136 100644
--- a/libburn/libburn.h
+++ b/libburn/libburn.h
@@ -842,14 +842,15 @@ void burn_read_opts_free(struct burn_read_opts *opts);
 void burn_disc_erase(struct burn_drive *drive, int fast);
 
 
-/* ts A70101 */
+/* ts A70101 - A70106 */
 /** Format media for use with libburn. This currently applies only to DVD-RW
     in state "Sequential Recording" (profile 0014h) which get formatted to
     state "Restricted Overwrite" (profile 0013h).
     @param drive The drive with the disc to format.
-    @param flag Unused yet. Submit 0.
+    @param size Unused yet. Submit: (off_t) 0.
+    @param flag Unused yet. Submit: 0.
 */
-void burn_disc_format(struct burn_drive *drive, int flag);
+void burn_disc_format(struct burn_drive *drive, off_t size, int flag);
 
 
 /* ts A61109 : this was and is defunct */
diff --git a/libburn/mmc.c b/libburn/mmc.c
index 2356921..d58b791 100644
--- a/libburn/mmc.c
+++ b/libburn/mmc.c
@@ -1169,11 +1169,12 @@ int mmc_read_buffer_capacity(struct burn_drive *d)
 
    @param flag unused yet, submit 0
 */
-int mmc_format_unit(struct burn_drive *d, int flag)
+int mmc_format_unit(struct burn_drive *d, off_t size, int flag)
 {
 	struct buffer buf;
 	struct command c;
-	int ret, tolerate_failure = 0, return_immediately = 0;
+	int ret, tolerate_failure = 0, return_immediately = 0, i;
+	off_t num_of_blocks = 0;
 	char msg[160],descr[80];
 
 	mmc_function_spy("mmc_format_unit");
@@ -1189,11 +1190,15 @@ int mmc_format_unit(struct burn_drive *d, int flag)
 	descr[0] = 0;
 	c.page->data[1] = 0x02;                   /* Immed */
 	c.page->data[3] = 8;                      /* Format descriptor length */
+	num_of_blocks = size / 2048;
+	for (i = 0; i < 4; i++)
+		c.page->data[4 + i] = (num_of_blocks >> (24 - 8 * i)) & 0xff;
 	if (d->current_profile == 0x1a) { /* DVD+RW */
 	/* >>> use case: background formatting during write */
 
 		/* mmc5r03c.pdf , 6.5.4.2.14, DVD+RW Basic Format */
 		c.page->data[8] = 0x26 << 2;        /* Format type */
+		/* Note: parameter "size" is ignored here */
 		memset(c.page->data + 4, 0xff, 4);  /* maximum blocksize */
 		if (d->bg_format_status == 1)       /* is partly formatted */
 			c.page->data[11] = 1;       /* Restart bit */
diff --git a/libburn/mmc.h b/libburn/mmc.h
index e79cb92..df0938b 100644
--- a/libburn/mmc.h
+++ b/libburn/mmc.h
@@ -53,7 +53,7 @@ int mmc_setup_drive(struct burn_drive *d);
 
 /* ts A61219 : learned much from dvd+rw-tools-7.0: plus_rw_format()
                and mmc5r03c.pdf, 6.5 FORMAT UNIT */
-int mmc_format_unit(struct burn_drive *d, int flag);
+int mmc_format_unit(struct burn_drive *d, off_t size, int flag);
 
 /* ts A61225 : obtain write speed descriptors via ACh GET PERFORMANCE */
 int mmc_get_write_performance(struct burn_drive *d);
diff --git a/libburn/transport.h b/libburn/transport.h
index b8df4e7..c058f79 100644
--- a/libburn/transport.h
+++ b/libburn/transport.h
@@ -224,7 +224,7 @@ struct burn_drive
 	int (*read_buffer_capacity) (struct burn_drive *d);
 
 	/* ts A61220 : format media (e.g. DVD+RW) */
-	int (*format_unit) (struct burn_drive *d, int flag);
+	int (*format_unit) (struct burn_drive *d, off_t size, int flag);
 
 };
 
diff --git a/libburn/write.c b/libburn/write.c
index b6abfbb..8836f73 100644
--- a/libburn/write.c
+++ b/libburn/write.c
@@ -943,7 +943,7 @@ int burn_disc_setup_dvd_plus_rw(struct burn_write_opts *o,
 	if (d->bg_format_status==0 || d->bg_format_status==1) {
 		d->busy = BURN_DRIVE_FORMATTING;
 		/* start or re-start dvd_plus_rw formatting */
-		ret = d->format_unit(d, 0);
+		ret = d->format_unit(d, (off_t) 0, 0);
 		if (ret <= 0)
 			return 0;
 		d->busy = BURN_DRIVE_WRITING;
@@ -995,7 +995,7 @@ int burn_disc_setup_dvd_minus_rw(struct burn_write_opts *o,
 
 		d->busy = BURN_DRIVE_FORMATTING;
 
-                ret = d->format_unit(d, 0); /* "quick grow" */
+                ret = d->format_unit(d, (off_t) 0, 0); /* "quick grow" */
 		if (ret <= 0)
 			return 0;
 		d->busy = BURN_DRIVE_WRITING;
diff --git a/test/libburner.c b/test/libburner.c
index 00bf446..91dd9cf 100644
--- a/test/libburner.c
+++ b/test/libburner.c
@@ -321,7 +321,7 @@ int libburner_format_row(struct burn_drive *drive)
 		return 0;
 	}
 	printf("Beginning to format media.\n");
-	burn_disc_format(drive, 0);
+	burn_disc_format(drive, (off_t) 0, 0);
 	sleep(1);
 	while (burn_drive_get_status(drive, &p) != BURN_DRIVE_IDLE) {
 		if(p.sectors>0 && p.sector>=0) /* display 1 to 99 percent */