diff --git a/cdrskin/cdrskin_timestamp.h b/cdrskin/cdrskin_timestamp.h
index e49304a..5a2b37a 100644
--- a/cdrskin/cdrskin_timestamp.h
+++ b/cdrskin/cdrskin_timestamp.h
@@ -1 +1 @@
-#define Cdrskin_timestamP "2009.10.27.101031"
+#define Cdrskin_timestamP "2009.10.30.134640"
diff --git a/libburn/libburn.h b/libburn/libburn.h
index 545e38b..f579c7a 100644
--- a/libburn/libburn.h
+++ b/libburn/libburn.h
@@ -2749,4 +2749,26 @@ BURN_END_DECLS
 
 #endif
 
+
+/* Temporary facility for exploring Problems with Pioneer DVR-216D which
+   does not end writing of DVD-R.
+   This code does not hamper normal operations but causes some extra
+   messages to stderr and lots of text lines in File
+    /tmp/libburn_sg_command_log 
+
+   Move the next line outside this remark and remove all blanks up to "define".
+   # define Libburn_pioneer_dvr_216d_tesT 1
+*/
+
+/* Temporary facility to disable asynchronous execution of the final buffer
+   flush command SYNCHRONIZE CACHE. This is suspected to cycle endlessly
+   on Pioneer DVR-216D.
+   On the other hand, synchronous execution of the command blocks a P-ATA 
+   controller for both eventually connected devices.
+
+   Move the next line outside this remark and remove all blanks up to "define".
+   # Libburn_pioneer_dvr_sync_not_immeD 1
+*/
+
+
 #endif /*LIBBURN_H*/
diff --git a/libburn/mmc.c b/libburn/mmc.c
index f7884d0..cc70387 100644
--- a/libburn/mmc.c
+++ b/libburn/mmc.c
@@ -2823,7 +2823,9 @@ void mmc_sync_cache(struct burn_drive *d)
 */
 	c.retry = 1;
 
+#ifndef Libburn_pioneer_dvr_sync_not_immeD
 	c.opcode[1] |= 2; /* ts A70918 : Immed */
+#endif
 
 	c.page = NULL;
 	c.dir = NO_TRANSFER;
@@ -2852,7 +2854,12 @@ void mmc_sync_cache(struct burn_drive *d)
 		d->cancel = 1;
 		return;
 	}
+
+#ifdef Libburn_pioneer_dvr_216d_tesT
+	if (spc_wait_unit_attention(d, 300, "SYNCHRONIZE CACHE", 0) <= 0)
+#else
 	if (spc_wait_unit_attention(d, 3600, "SYNCHRONIZE CACHE", 0) <= 0)
+#endif
 		d->cancel = 1;
 	else
 		d->needs_sync_cache = 0;
diff --git a/libburn/sg-linux.c b/libburn/sg-linux.c
index 622dafd..99a3bd6 100644
--- a/libburn/sg-linux.c
+++ b/libburn/sg-linux.c
@@ -1655,6 +1655,12 @@ int sg_release(struct burn_drive *d)
 #define Libburn_log_sg_command_stderR 1
 */
 
+#ifdef Libburn_pioneer_dvr_216d_tesT
+#define Libburn_log_sg_commandS 1
+#define Libburn_fflush_log_sg_commandS 1
+#endif
+
+
 #ifdef Libburn_log_sg_commandS
 
 /** Logs command (before execution) */
diff --git a/libburn/spc.c b/libburn/spc.c
index 73d8bb6..0f66ebb 100644
--- a/libburn/spc.c
+++ b/libburn/spc.c
@@ -113,11 +113,13 @@ int spc_wait_unit_attention(struct burn_drive *d, int max_sec, char *cmd_text,
 	for(i = !(flag & 1); i < max_sec * 10; i++) {
 		ret = spc_test_unit_ready_r(d, &key, &asc, &ascq);
 
-/* <<< 
-		fprintf(stderr,
+#ifdef Libburn_pioneer_dvr_216d_tesT
+		if ((i % 100) == 1)
+			fprintf(stderr,
 "libburn_EXPERIMENTAL: i= %d  ret= %d  key= %X  asc= %2.2X  ascq= %2.2X\n",
-		i, ret, (unsigned) key, (unsigned) asc, (unsigned) ascq);
-*/
+				i, ret, (unsigned) key,
+				(unsigned) asc, (unsigned) ascq);
+#endif /* Libburn_pioneer_dvr_216d_tesT */
 
 		if (ret > 0) /* ready */
 	break;
@@ -140,24 +142,14 @@ int spc_wait_unit_attention(struct burn_drive *d, int max_sec, char *cmd_text,
 				/* media change notice = try again */
 				goto slumber;
 
-#ifdef NIX
-			sprintf(msg,
-		"Asynchromous SCSI error on %s: key=%X asc=%2.2Xh ascq=%2.2Xh",
-			 	cmd_text, (unsigned) key, (unsigned) asc,
-				(unsigned) ascq);
-#else
-
 			/* ts A90213 */
 			sprintf(msg,
-				"Asynchromous SCSI error on %s: ", cmd_text);
+				"Asynchronous SCSI error on %s: ", cmd_text);
 			sense[2] = key;
 			sense[12] = asc;
 			sense[13] = ascq;
 			resp = scsi_error_msg(d, sense, 14, msg + strlen(msg),
 						 &key, &asc, &ascq);
-
-#endif /* ! NIX */
-
 			libdax_msgs_submit(libdax_messenger, d->global_index,
 				0x0002014d,
 				LIBDAX_MSGS_SEV_SORRY, LIBDAX_MSGS_PRIO_HIGH,