diff --git a/cdrskin/cdrskin_timestamp.h b/cdrskin/cdrskin_timestamp.h
index d3398a9..e2343f2 100644
--- a/cdrskin/cdrskin_timestamp.h
+++ b/cdrskin/cdrskin_timestamp.h
@@ -1 +1 @@
-#define Cdrskin_timestamP "2012.10.25.173408"
+#define Cdrskin_timestamP "2012.11.18.184006"
diff --git a/libburn/libburn.h b/libburn/libburn.h
index 8c8394e..ec4a4b9 100644
--- a/libburn/libburn.h
+++ b/libburn/libburn.h
@@ -3996,4 +3996,19 @@ BURN_END_DECLS
 #define Libburn_dummy_probe_write_modeS 1
 
 
+/* Early experimental:
+   Do not define Libburn_develop_quality_scaN unless you want to work
+   towards a usable implementation.
+   If it gets enabled, then the call must be published in libburn/libburn.ver
+*/
+#ifdef Libburn_develop_quality_scaN
+
+/* B21108 ts */
+/* Experiments mit quality scan command F3 on Optiarc drive */
+int burn_nec_optiarc_rep_err_rate(struct burn_drive *d,
+                                  int start_lba, int rate_period, int flag);
+
+#endif /* Libburn_develop_quality_scaN */
+
+
 #endif /*LIBBURN_H*/
diff --git a/libburn/mmc.c b/libburn/mmc.c
index 34b9b3c..ea350a2 100644
--- a/libburn/mmc.c
+++ b/libburn/mmc.c
@@ -4243,6 +4243,77 @@ int mmc_read_10(struct burn_drive *d, int start,int amount, struct buffer *buf)
 }
 
 
+#ifdef Libburn_develop_quality_scaN
+
+/* B21108 ts : Vendor specific command REPORT ERROR RATE, see
+               http://liggydee.cdfreaks.com/ddl/errorcheck.pdf
+*/
+int mmc_nec_optiarc_f3(struct burn_drive *d, int sub_op,
+                       int start_lba, int rate_period,
+                       int *ret_lba, int *error_rate1, int *error_rate2)
+{
+	struct buffer *buf = NULL;
+	struct command *c;
+	char *msg = NULL;
+	int key, asc, ascq, ret;
+	static unsigned char MMC_NEC_OPTIARC_F3[] =
+		{ 0xF3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
+
+	BURN_ALLOC_MEM(buf, struct buffer, 1);
+	BURN_ALLOC_MEM(c, struct command, 1);
+	mmc_start_if_needed(d, 0);
+	if (mmc_function_spy(d, "mmc_nec_optiarc_f3") <= 0)
+		return -1;
+
+	scsi_init_command(c, MMC_NEC_OPTIARC_F3, sizeof(MMC_NEC_OPTIARC_F3));
+	if (sub_op == 3) {
+		c->dxfer_len = 8;
+		c->dir = FROM_DRIVE;
+	} else {
+		c->dxfer_len = 0;
+		c->dir = NO_TRANSFER;
+	}
+	c->retry = 0;
+	c->opcode[1] = sub_op;
+	mmc_int_to_four_char(c->opcode + 2, start_lba);
+	c->opcode[8] = rate_period;
+	c->page = buf;
+	c->page->bytes = 0;
+	c->page->sectors = 0;
+	d->issue_command(d, c);
+	if (c->error) {
+		msg = calloc(1, 256);
+		if (msg != NULL) {
+			sprintf(msg,
+			  "SCSI error on nec_optiarc_f3(%d, %d, %d): ",
+                           sub_op, start_lba, rate_period);
+			scsi_error_msg(d, c->sense, 14, msg + strlen(msg), 
+					&key, &asc, &ascq);
+			libdax_msgs_submit(libdax_messenger,
+				d->global_index, 0x00020144,
+				LIBDAX_MSGS_SEV_SORRY, LIBDAX_MSGS_PRIO_HIGH,
+				msg, 0, 0);
+			free(msg);
+		}
+		return BE_CANCELLED;
+	}
+
+	if (sub_op == 3) {
+		*ret_lba = mmc_four_char_to_int(c->page->data);
+		*error_rate1 = c->page->data[4] * 256 + c->page->data[5];
+		*error_rate2 = c->page->data[6] * 256 + c->page->data[7];
+	}
+
+	ret = 1;
+ex:;
+	BURN_FREE_MEM(c);
+	BURN_FREE_MEM(buf);
+	return ret;
+}
+
+#endif /* Libburn_develop_quality_scaN */
+
+
 /* ts A81210 : Determine the upper limit of readable data size */
 int mmc_read_capacity(struct burn_drive *d)
 {
diff --git a/libburn/mmc.h b/libburn/mmc.h
index b0f2240..6b1274f 100644
--- a/libburn/mmc.h
+++ b/libburn/mmc.h
@@ -128,4 +128,11 @@ int mmc_get_leadin_text(struct burn_drive *d,
                         unsigned char **text_packs, int *num_packs, int flag);
 
 
+#ifdef Libburn_develop_quality_scaN
+/* B21108 ts */
+int mmc_nec_optiarc_f3(struct burn_drive *d, int sub_op,
+                       int start_lba, int rate_period,
+                       int *eba, int *error_rate1, int *error_rate2);
+#endif
+
 #endif /*__MMC*/
diff --git a/libburn/read.c b/libburn/read.c
index 29bfea4..b5cbc52 100644
--- a/libburn/read.c
+++ b/libburn/read.c
@@ -36,6 +36,7 @@
 #include "init.h"
 #include "toc.h"
 #include "util.h"
+#include "mmc.h"
 #include "sg.h"
 #include "read.h"
 #include "options.h"
@@ -535,3 +536,42 @@ ex:;
 	d->busy = BURN_DRIVE_IDLE;
 	return ret;
 }
+
+
+#ifdef Libburn_develop_quality_scaN
+
+/* B21108 ts */
+int burn_nec_optiarc_rep_err_rate(struct burn_drive *d,
+                                  int start_lba, int rate_period, int flag)
+{
+	int ret, lba = 0, error_rate1 = 0, error_rate2 = 0, enabled = 0, dret;
+
+	/* Sub Operation Code 1 : Enable Error Rate reporting function */
+	ret = mmc_nec_optiarc_f3(d, 1, start_lba, rate_period,
+	                         &lba, &error_rate1, &error_rate2);
+	if (ret <= 0)
+		goto ex;
+	enabled = 1;
+
+	/* >>> Sub Operation Code 2 : Seek to starting address
+               start_lba , rate_period
+	*/;
+
+	/* >>> Loop with Sub Operation Code 3 : Send Error Rate information
+               reply: 4-byte LBA , 2-byte C1/PIE , 2-byte C2/PIF
+	*/;
+
+	ret = 1;
+ex:;
+	if (enabled) {
+		/* Code F : Disable Error Rate reporting function */
+		dret = mmc_nec_optiarc_f3(d, 0xf, 0, 0,
+					&lba, &error_rate1, &error_rate2);
+		if (dret < ret)
+			ret = dret;
+	}
+	return ret;
+}
+
+#endif /* Libburn_develop_quality_scaN */
+
diff --git a/libburn/spc.c b/libburn/spc.c
index c0645b5..7d63df3 100644
--- a/libburn/spc.c
+++ b/libburn/spc.c
@@ -1466,6 +1466,14 @@ static char *scsi_command_name(unsigned int c, int flag)
 		return "SET CD SPEED";
         case 0xbe:
 		return "READ CD";
+
+#ifdef Libburn_develop_quality_scaN
+
+        case 0xf3:
+		return "NEC/OPTIARC REPORT ERROR RATE";
+
+#endif /* Libburn_develop_quality_scaN */
+
 	}
 	return "(NOT IN LIBBURN COMMAND LIST)";
 }