Hi, > ... > GET [CURRENT] PERFORMANCE:
Looks like a successful command execution. I would next try wether growisofs is able to burn with speeds 2.4 and 4.0. ---------------------------------------------------------- Dirty details: For the SCSI commands involved let's look into dvd+rw-tools-7.0/dvd+rw-mediainfo.cpp (Search for text "GET [CURRENT] PERFORMANCE) As reference i read http://www.t10.org/ftp/t10/drafts/mmc5/mmc5r03c.pdf > Write Performance: 4.0x1385=5540KB/[EMAIL PROTECTED] -> 2295103] The CDB would look like AC 04 00 00 00 00 00 00 nn nn 00 00 in comparison to cdrecord's AC 00 00 00 00 00 00 00 00 64 03 00 where "nn nn" is the number of allocated descriptor records which "00 64" in case of cdrecord. dvd+rw-mediainfo inquires this number first by "00 01" and then allocates the necessary memory before doing the real descriptor inquiry. Reading MMC-5: the difference is the parameter Type in byte number 10. dvd+rw-mediainfo here uses Type 0, cdrecord uses Type 3. The value 04 in byte 1 (parameter Data Type) indicates that dvd+rw-mediainfo is interested in write performance. We learn from the reply that the write performance is up to 4x DVD speed. Valid over the sector range from 0 to 4.7 GB. > Speed Descriptor#0: 02/2295103 [EMAIL PROTECTED]/s [EMAIL PROTECTED]/s > Speed Descriptor#1: 02/2295103 [EMAIL PROTECTED]/s [EMAIL PROTECTED]/s This stems from a CDB AC ?? 00 00 00 00 00 00 nn nn 03 00 i.e. with the Type used by the command which has trouble within cdrecord. MMC-5 says nothing about the Data Type (byte 1 of the CDB) with Type 03h. I would expect that ?? is still 04 from the previous command. We learn from the reply that write speeds 2.4x and 4.0x could be set by command B6h SET STREAMING. (This is what growisofs or my program cdrskin are supposed to do if you let them burn a DVD+RW and order to use those speeds. growisofs calculates permissible speeds, cdrskin lets the drive calculate.) Have a nice day :) Thomas -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
