diff --git a/cdrskin/cdrskin_timestamp.h b/cdrskin/cdrskin_timestamp.h
index 49daa5f..1b6803c 100644
--- a/cdrskin/cdrskin_timestamp.h
+++ b/cdrskin/cdrskin_timestamp.h
@@ -1 +1 @@
-#define Cdrskin_timestamP "2014.02.05.185801"
+#define Cdrskin_timestamP "2014.02.05.191839"
diff --git a/libburn/async.c b/libburn/async.c
index e416316..44240e5 100644
--- a/libburn/async.c
+++ b/libburn/async.c
@@ -643,8 +643,7 @@ void burn_disc_write(struct burn_write_opts *opts, struct burn_disc *disc)
 	if (d->drive_role == 1) {
 		mvalid = 0;
 		if (d->mdata != NULL)
-			if (d->mdata->valid > 0)
-				mvalid = 1;
+			mvalid = 1;
 		if (!mvalid) {
 			libdax_msgs_submit(libdax_messenger,
 				d->global_index, 0x00020113,
diff --git a/libburn/drive.c b/libburn/drive.c
index 7677dbd..529ef6b 100644
--- a/libburn/drive.c
+++ b/libburn/drive.c
@@ -263,8 +263,9 @@ int burn_drive_inquire_media(struct burn_drive *d)
 
         /* ts A71128 : run read_disc_info() for any recognizeable profile */
 	if (d->current_profile > 0 || d->current_is_guessed_profile ||
-	    d->mdata->cdr_write || d->mdata->cdrw_write ||
-	    d->mdata->dvdr_write || d->mdata->dvdram_write) {
+	    (d->mdata->p2a_valid > 0 &&
+		(d->mdata->cdr_write || d->mdata->cdrw_write ||
+		 d->mdata->dvdr_write || d->mdata->dvdram_write)) ) {
 
 #define Libburn_knows_correct_state_after_loaD 1
 #ifdef Libburn_knows_correct_state_after_loaD
@@ -647,7 +648,7 @@ struct burn_drive *burn_drive_finish_enum(struct burn_drive *d)
 	        t->released = 1;
 	} else {
 		/* ts A90602 */
-		d->mdata->valid = -1;
+		d->mdata->p2a_valid = -1;
                 sprintf(msg, "Unable to grab scanned drive %s", d->devname);
                 libdax_msgs_submit(libdax_messenger, d->global_index,
                                 0x0002016f, LIBDAX_MSGS_SEV_DEBUG,
@@ -1227,7 +1228,7 @@ static int drive_getcaps(struct burn_drive *d, struct burn_drive_info *out)
 	a ssert(d->mdata);
 #endif
 
-	if(d->idata->valid <= 0 || d->mdata->valid <= 0)
+	if(d->idata->valid <= 0)
 		return 0;
 
 	id = (struct burn_scsi_inquiry_data *)d->idata;
@@ -1240,18 +1241,27 @@ static int drive_getcaps(struct burn_drive *d, struct burn_drive_info *out)
 	strip_spaces(out->revision);
 	strncpy(out->location, d->devname, 16);
 	out->location[16] = '\0';
-	out->buffer_size = d->mdata->buffer_size;
-	out->read_dvdram = !!d->mdata->dvdram_read;
-	out->read_dvdr = !!d->mdata->dvdr_read;
-	out->read_dvdrom = !!d->mdata->dvdrom_read;
-	out->read_cdr = !!d->mdata->cdr_read;
-	out->read_cdrw = !!d->mdata->cdrw_read;
-	out->write_dvdram = !!d->mdata->dvdram_write;
-	out->write_dvdr = !!d->mdata->dvdr_write;
-	out->write_cdr = !!d->mdata->cdr_write;
-	out->write_cdrw = !!d->mdata->cdrw_write;
-	out->write_simulate = !!d->mdata->simulate;
-	out->c2_errors = !!d->mdata->c2_pointers;
+
+	if (d->mdata->p2a_valid > 0) {
+		out->buffer_size = d->mdata->buffer_size;
+		out->read_dvdram = !!d->mdata->dvdram_read;
+		out->read_dvdr = !!d->mdata->dvdr_read;
+		out->read_dvdrom = !!d->mdata->dvdrom_read;
+		out->read_cdr = !!d->mdata->cdr_read;
+		out->read_cdrw = !!d->mdata->cdrw_read;
+		out->write_dvdram = !!d->mdata->dvdram_write;
+		out->write_dvdr = !!d->mdata->dvdr_write;
+		out->write_cdr = !!d->mdata->cdr_write;
+		out->write_cdrw = !!d->mdata->cdrw_write;
+		out->write_simulate = !!d->mdata->simulate;
+		out->c2_errors = !!d->mdata->c2_pointers;
+	} else {
+		out->buffer_size = out->read_dvdram = out->read_dvdr = 0;
+		out->read_dvdrom = out->read_cdr = out->read_cdrw = 0;
+		out->write_dvdram = out->write_dvdr = out->write_cdr = 0;
+		out->write_cdrw = out->write_simulate = out->c2_errors = 0;
+	}
+
 	out->drive = d;
 
 #ifdef Libburn_dummy_probe_write_modeS
@@ -1570,23 +1580,17 @@ void burn_sectors_to_msf(int sectors, int *m, int *s, int *f)
 
 int burn_drive_get_read_speed(struct burn_drive *d)
 {
-	if(d->mdata->valid <= 0)
-		return 0;
 	return d->mdata->max_read_speed;
 }
 
 int burn_drive_get_write_speed(struct burn_drive *d)
 {
-	if(d->mdata->valid <= 0)
-		return 0;
 	return d->mdata->max_write_speed;
 }
 
 /* ts A61021 : New API function */
 int burn_drive_get_min_write_speed(struct burn_drive *d)
 {
-	if(d->mdata->valid <= 0)
-		return 0;
 	return d->mdata->min_write_speed;
 }
 
@@ -2525,7 +2529,8 @@ int burn_disc_read_atip(struct burn_drive *d)
 	if(d->drive_role != 1)
 		return 0;
 	if ((d->current_profile == -1 || d->current_is_cd_profile)
-	    && (d->mdata->cdrw_write || d->current_profile != 0x08)) {
+	    && ((d->mdata->p2a_valid > 0 && d->mdata->cdrw_write) ||
+	        d->current_profile != 0x08)) {
 		d->read_atip(d);
 		/* >>> some control of success would be nice :) */
 	} else {
@@ -2754,8 +2759,6 @@ int burn_speed_descriptor_copy(struct burn_speed_descriptor *from,
 /* ts A61226 : free dynamically allocated sub data of struct scsi_mode_data */
 int burn_mdata_free_subs(struct scsi_mode_data *m)
 {
-	if(!m->valid)
-		return 0;
 	burn_speed_descriptor_destroy(&(m->speed_descriptors), 1);
 	return 1;
 }
@@ -2769,8 +2772,6 @@ int burn_drive_get_speedlist(struct burn_drive *d,
 	struct burn_speed_descriptor *sd, *csd = NULL;
 
 	(*speed_list) = NULL;
-	if(d->mdata->valid <= 0)
-		return 0;
 	for (sd = d->mdata->speed_descriptors; sd != NULL; sd = sd->next) {
 		ret = burn_speed_descriptor_new(&csd, NULL, csd, 0);
 		if (ret <= 0)
@@ -2794,8 +2795,6 @@ int burn_drive_get_best_speed(struct burn_drive *d, int speed_goal,
 	if (speed_goal < 0)
 		best_speed = 2000000000;
 	*best_descr = NULL;
-	if(d->mdata->valid <= 0)
-		return 0;
 	for (sd = d->mdata->speed_descriptors; sd != NULL; sd = sd->next) {
 		if (flag & 1)
 			speed = sd->read_speed;
@@ -2939,7 +2938,8 @@ int burn_disc_get_multi_caps(struct burn_drive *d, enum burn_write_types wt,
 			o->multi_session = o->multi_track = 0;
 		else if(wt == BURN_WRITE_NONE || wt == BURN_WRITE_SAO ||
 			wt == BURN_WRITE_TAO)
-			o->might_simulate = !!d->mdata->simulate;
+			o->might_simulate = !!(d->mdata->p2a_valid > 0 &&
+			                       d->mdata->simulate);
 	} else if (d->current_profile == 0x11 || d->current_profile == 0x14 ||
 			d->current_profile == 0x15) {
 		/* DVD-R , sequential DVD-RW , DVD-R/DL Sequential */
diff --git a/libburn/libburn.h b/libburn/libburn.h
index 63b041b..91956a1 100644
--- a/libburn/libburn.h
+++ b/libburn/libburn.h
@@ -594,6 +594,11 @@ struct burn_drive_info
             to inquire a device file address.            ^^^^^ ALWAYS ^^^^^^^*/
 	char location[17];
 
+	/* DEPRECATION:
+	   Start of information from mode page 2Ah which is declared
+	   obsolete by MMC-5. Do not rely on this, if you can get a
+	   meaningful reply from burn_drive_get_all_profiles()
+	*/
 	/** Can the drive read DVD-RAM discs */
 	unsigned int read_dvdram:1;
 	/** Can the drive read DVD-R discs */
@@ -622,6 +627,9 @@ struct burn_drive_info
 
 	/** The size of the drive's buffer (in kilobytes) */
 	int buffer_size;
+
+	/* End of DEPRECATION */
+
 	/** 
 	 * The supported block types in tao mode.
 	 * They should be tested with the desired block type.
diff --git a/libburn/mmc.c b/libburn/mmc.c
index 400fffc..473e346 100644
--- a/libburn/mmc.c
+++ b/libburn/mmc.c
@@ -1523,7 +1523,8 @@ static int mmc_read_toc_al(struct burn_drive *d, int *alloc_len)
 	   SanDisk Cruzer U3 memory stick stalls on format 2.
 	   Format 0 seems to be more conservative with read-only drives.
 	*/
-	if (!(d->mdata->cdrw_write || d->current_profile != 0x08)) {
+	if (!((d->mdata->p2a_valid > 0 && d->mdata->cdrw_write) ||
+	      d->current_profile != 0x08)) {
 		ret = mmc_read_toc_fmt0(d);
 		goto ex;
 	}
@@ -4636,6 +4637,13 @@ fprintf(stderr, "libburn_EXPERIMENTAL: block_type = %d, pd[4]= %u\n",
 			memcpy(pd + 33, isrc_text, 12);
 		}
 	}
+	if (d->mdata->write_page_valid <= 0) {
+		libdax_msgs_submit(libdax_messenger, -1, 0x00000002,
+			LIBDAX_MSGS_SEV_DEBUG, LIBDAX_MSGS_PRIO_ZERO,
+			"mmc_compose_mode_page_5: No mode page 05 was read",
+		 	0, 0);
+		return 0;
+	}
 	return 1;
 }
 
diff --git a/libburn/options.c b/libburn/options.c
index c27aa97..f29b214 100644
--- a/libburn/options.c
+++ b/libburn/options.c
@@ -44,7 +44,8 @@ struct burn_write_opts *burn_write_opts_new(struct burn_drive *drive)
 	opts->toc_entry = NULL;
 	opts->toc_entries = 0;
 	opts->simulate = 0;
-	opts->underrun_proof = drive->mdata->underrun_proof;
+	opts->underrun_proof = drive->mdata->p2a_valid > 0 &&
+	                       drive->mdata->underrun_proof;
 	opts->perform_opc = 1;
 	opts->obs = -1;
 
@@ -172,17 +173,6 @@ void burn_write_opts_set_format(struct burn_write_opts *opts, int format)
 
 int burn_write_opts_set_simulate(struct burn_write_opts *opts, int sim)
 {
-/* <<< ts A70529 :
-       One cannot predict the ability to simulate from page 05h
-       information alone. This check is now done later in 
-       function  burn_write_opts_auto_write_type().
-
-	if (opts->drive->mdata->simulate) {
-		opts->simulate = sim;
-		return 1;
-	}
-	return 0;
-*/
 	opts->simulate = !!sim;
 	return 1;
 }
@@ -190,9 +180,8 @@ int burn_write_opts_set_simulate(struct burn_write_opts *opts, int sim)
 int burn_write_opts_set_underrun_proof(struct burn_write_opts *opts,
 				       int underrun_proof)
 {
-	if (opts->drive->mdata->valid <= 0)
-		return 0;
-	if (opts->drive->mdata->underrun_proof) {
+	if (opts->drive->mdata->p2a_valid <= 0 ||
+	    opts->drive->mdata->underrun_proof) {
 		opts->underrun_proof = underrun_proof;
 		return 1;
 	}
diff --git a/libburn/sg-freebsd.c b/libburn/sg-freebsd.c
index 7ddf273..77a3025 100644
--- a/libburn/sg-freebsd.c
+++ b/libburn/sg-freebsd.c
@@ -492,13 +492,13 @@ static void enumerate_common(char *fname, int bus_no, int host_no,
 	out.idata = calloc(1, sizeof(struct burn_scsi_inquiry_data));
 	out.idata->valid = 0;
 	out.mdata = calloc(1, sizeof(struct scsi_mode_data));
-	out.mdata->valid = 0;
 	if (out.idata == NULL || out.mdata == NULL) {
 		libdax_msgs_submit(libdax_messenger, -1, 0x00020108,
 			LIBDAX_MSGS_SEV_FATAL, LIBDAX_MSGS_PRIO_HIGH,
 			"Could not allocate new drive object", 0, 0);
 		return;
 	}
+	out.mdata->p2a_valid = 0;
 	memset(&out.params, 0, sizeof(struct params));
 	t = burn_drive_register(&out);
 
diff --git a/libburn/spc.c b/libburn/spc.c
index b307a57..02c2fbe 100644
--- a/libburn/spc.c
+++ b/libburn/spc.c
@@ -440,7 +440,7 @@ static int spc_sense_caps_al(struct burn_drive *d, int *alloc_len, int flag)
 
 	/* ts A90602 : Clearing mdata before command execution */
 	m = d->mdata;
-	m->valid = 0;
+	m->p2a_valid = 0;
 	burn_mdata_free_subs(m);
 
 	memset(buf, 0, sizeof(struct buffer));
@@ -457,7 +457,7 @@ static int spc_sense_caps_al(struct burn_drive *d, int *alloc_len, int flag)
 	d->issue_command(d, c);
 	if (c->error) {
 		memset(buf, 0, sizeof(struct buffer));
-		m->valid = -1;
+		m->p2a_valid = -1;
 		was_error = 1;
 	}
 
@@ -468,7 +468,7 @@ static int spc_sense_caps_al(struct burn_drive *d, int *alloc_len, int flag)
 
 	if (block_descr_len + 8 + 2 > *alloc_len) {
 		if (block_descr_len + 8 + 2 > BUFFER_SIZE || !(flag & 1)) {
-			m->valid = -1;
+			m->p2a_valid = -1;
 			sprintf(msg,
 		 "MODE SENSE page 2A with oversized Block Descriptors: %s : %d",
 				d->devname, block_descr_len);
@@ -476,6 +476,7 @@ static int spc_sense_caps_al(struct burn_drive *d, int *alloc_len, int flag)
 				0x0002016e, LIBDAX_MSGS_SEV_DEBUG,
 				LIBDAX_MSGS_PRIO_LOW, msg, 0, 0);
 			{ret = 0; goto ex;}
+
 		}
 		*alloc_len = block_descr_len + 10;
 		{ret = 2; goto ex;}
@@ -508,7 +509,7 @@ static int spc_sense_caps_al(struct burn_drive *d, int *alloc_len, int flag)
 	/* ts A90602 : page_length N asserts page[N+1]. (see SPC-1 8.3.3) */
 	/* ts B11031 : qemu drive has a page_length of 18 */
 	if (page_length < 18) {
-		m->valid = -1;
+		m->p2a_valid = -1;
 		sprintf(msg, "MODE SENSE page 2A too short: %s : %d",
 			d->devname, page_length);
 		libdax_msgs_submit(libdax_messenger, d->global_index,
@@ -550,7 +551,7 @@ static int spc_sense_caps_al(struct burn_drive *d, int *alloc_len, int flag)
 	m->max_end_lba = 0;
 
 	if (!was_error)
-		m->valid = 1;
+		m->p2a_valid = 1;
 
 	/* ts A61225 : end of MMC-1 , begin of MMC-3 */
 	if (page_length < 30) /* no write speed descriptors ? */
@@ -719,6 +720,8 @@ void spc_select_error_params(struct burn_drive *d,
 	
 	scsi_init_command(c, SPC_MODE_SELECT, sizeof(SPC_MODE_SELECT));
 	c->retry = 1;
+	if (d->mdata->retry_page_valid <= 0)
+		d->mdata->retry_page_length = 0;
 	c->opcode[8] = 8 + 2 + d->mdata->retry_page_length;
 	c->page = buf;
 	c->page->bytes = 0;
@@ -834,6 +837,8 @@ void spc_select_write_params(struct burn_drive *d, struct burn_session *s,
 		o->block_type,spc_block_type(o->block_type));
 	*/
 
+	if (d->mdata->write_page_valid <= 0)
+		d->mdata->write_page_length = 0;
 	alloc_len = 8 + 2 + d->mdata->write_page_length;
 	memset(&(buf->data), 0, alloc_len);
 
@@ -1083,7 +1088,11 @@ int burn_scsi_setup_drive(struct burn_drive *d, int bus_no, int host_no,
 		return -1;
 	}
 	d->idata->valid = 0;
-	d->mdata->valid = 0;
+	d->mdata->p2a_valid = 0;
+	d->mdata->max_read_speed = 0;
+	d->mdata->cur_read_speed = 0;
+	d->mdata->max_write_speed = 0;
+	d->mdata->cur_write_speed = 0;
 	d->mdata->speed_descriptors = NULL;
 	if (!(flag & 1)) {
 		ret = spc_setup_drive(d);
diff --git a/libburn/transport.h b/libburn/transport.h
index a02c20a..712b1a6 100644
--- a/libburn/transport.h
+++ b/libburn/transport.h
@@ -89,6 +89,7 @@ struct burn_scsi_inquiry_data
 
 struct scsi_mode_data
 {
+	int p2a_valid;
 	int buffer_size;
 	int dvdram_read;
 	int dvdram_write;
@@ -100,8 +101,13 @@ struct scsi_mode_data
 	int cdr_read;
 	int cdr_write;
 	int simulate;
+	int c2_pointers;
+	int underrun_proof;
+
 	int max_read_speed;
+	int cur_read_speed;
 	int max_write_speed;
+	int cur_write_speed;
 
 	/* ts A61021 */
 	int min_write_speed;
@@ -112,15 +118,10 @@ struct scsi_mode_data
 	int max_end_lba;
 	struct burn_speed_descriptor *speed_descriptors;
 
-	int cur_read_speed;
-	int cur_write_speed;
 	int retry_page_length;
 	int retry_page_valid;
 	int write_page_length;
 	int write_page_valid;
-	int c2_pointers;
-	int valid;
-	int underrun_proof;
 };