On Thursday 08 June 2006 16:15, Andy Polyakov wrote: > >> - reboot the system; > >> - put 16x media in unit and collect 'dvd+rw-mediainfo /dev/cdrom > >> verbose' output; > >> - perform 8x recording; > >> - put another 16x media in unit and collect another > > 'dvd+rw-mediainfo > >> /dev/cdrom verbose' output; > >> > >> Send both to me. > > > > Here attached there are the two outputs. > > Hope they can be useful. > > It sound like firmware bug... > > > ------------------------------------------------------------------------ > > > > INQUIRY: [PLEXTOR ][DVDR PX-716A ][1.09] > > Current Write Speed: 16.0x1385=22160KB/s > > Write Speed #0: 16.0x1385=22160KB/s > > Write Speed #1: 12.0x1385=16620KB/s > > Write Speed #2: 8.0x1385=11080KB/s > > Write Speed #3: 6.0x1385=8310KB/s > > Write Speed #4: 4.0x1385=5540KB/s > > GET CURRENT PERFORMANCE: > > Write Performance: 6.0x1385=8310KB/[EMAIL PROTECTED] -> 16.0x1385=22160KB/[EMAIL PROTECTED] > > GET PERFORMANCE: > > Speed Descriptor#0: 02/2295104 [EMAIL PROTECTED]/s [EMAIL PROTECTED]/s > > Speed Descriptor#1: 02/2295104 [EMAIL PROTECTED]/s [EMAIL PROTECTED]/s > > Speed Descriptor#2: 02/2295104 [EMAIL PROTECTED]/s [EMAIL PROTECTED]/s > > Speed Descriptor#3: 02/2295104 [EMAIL PROTECTED]/s [EMAIL PROTECTED]/s > > Speed Descriptor#4: 02/2295104 [EMAIL PROTECTED]/s [EMAIL PROTECTED]/s > > > > ------------------------------------------------------------------------ > > > > INQUIRY: [PLEXTOR ][DVDR PX-716A ][1.09] > > Current Write Speed: 8.0x1385=11080KB/s > > Write Speed #0: 16.0x1385=22160KB/s > > Write Speed #1: 12.0x1385=16620KB/s > > Write Speed #2: 8.0x1385=11080KB/s > > Write Speed #3: 6.0x1385=8310KB/s > > Write Speed #4: 4.0x1385=5540KB/s > > GET CURRENT PERFORMANCE: > > Write Performance: 6.0x1385=8310KB/[EMAIL PROTECTED] -> 16.0x1385=22160KB/[EMAIL PROTECTED] > > GET PERFORMANCE: > > Speed Descriptor#0: 02/2295104 [EMAIL PROTECTED]/s [EMAIL PROTECTED]/s > > Speed Descriptor#1: 02/2295104 [EMAIL PROTECTED]/s [EMAIL PROTECTED]/s > > Speed Descriptor#2: 02/2295104 [EMAIL PROTECTED]/s [EMAIL PROTECTED]/s > > Speed Descriptor#3: 02/2295104 [EMAIL PROTECTED]/s [EMAIL PROTECTED]/s > > Speed Descriptor#4: 02/2295104 [EMAIL PROTECTED]/s [EMAIL PROTECTED]/s > > Note that "GET CURRENT PERFORMANCE" returns 16x in both cases, while > "Current Write Speed" is 8x in second case. The value obtained by "GET > CURRENT PERFORMANCE," "Write Performance" is commonly controlled by "SET > STREAMING" command, while "Current Write Speed" [exposed through "page > 2A"] - by "SET CD SPEED" command. Now, specification says that DVD > recording speed shall be controlled by "SET STREAMING," while "SET CD > SPEED" [as well as "page 2A"] is retained for legacy CD recording [and > other] software. In other words new software is *expected* to use "SET > STREAMING" unit is *expected* to respect it. Some units even don't > expose DVD recording velocities through "page 2A," and any attempt to > change its values has *no* effect on DVD recordings. Nor should it have > according to specification! And your firmware seems to violate this > clause by favoring "Current Write Speed"... File bug report to Plextor...
Shame on Plextor... > Try if attached snippet can reset "Current Write Speed" to 16x. Save it > to dvd+rw-tools source directory and compile with 'g++ resetspeed.cpp'. > What it does is send "restore all defaults" to unit, though through "SET > STREAMING" command. A. Thanks for the snipped but unfortunately it doesn't work! I've tried to launch resetspeed /dev/dvd ( with the inserted medium ) also from root but after a 8x burn, dvd+rw-mediainfo reports always: Current Write Speed: 8.0x1385=11080KB/s Regards. Stefano -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]