Hi, what i believe to have learned so far:
- The problem is a co-operation of ASUS DRW-24D5MT and Brasero or some software which Brasero employs. This other software (if involved at all) does not strike with K3B (tested by Mauro Sacchetto) or non-GUI burn programs like wodim or xorriso. - The problem happens only with CD media. This media family is the most complicated among the optical media, because it not only can record data blocks of 2048 bytes per sector but also other sector types like CD-DA with 2352 bytes. - Reading data CD by audio CD commands is supposed to fail on the first read attempt, but the ASUS DRW-24D5MT tolerates this against the SCSI specs. The drive announces the obsolete feature 103h "CD Audio External Play Feature". (PIONEER BDR-S09 does not. TSSTcorp SH-S223B does, but throws the specified error when reading data CD as audio CD.) Weak theory: This tolerance might lure Brasero or other software into sending SCSI commands which are inappropriate with data CD, like the obsolete SCAN command or the obsolete STOP PLAY/SCAN command. These commands were obsoleted in 2006 by MMC-5 together with the PLAY AUDIO and other commands which were specific to standalone playing of audio CD. (All drives still support READ CD which can be used to read audio CD into the computer and let its media players create sound.) - There seems to be involved a difference between Cinnamon of Debian Testing and XFCE of Debian 10. While Mauro Sacchetto does not get an unusable drive with Brasero and a blank CD-RW on Cinnamon, i get to that problem after writing succeeded but before the checksum gets verified by Brasero. (The CD verifies good in another drive by comparing the MD5s of ISO image and CD.) With non-blank CD-RW i experienced sometimes the problem already after inserting it into the ASUS drive while Brasero is running. Mauro Sacchetto did not report such an early problem. -------------------------------------------------------------------- Open questions: - Would it happen without desktop ? E.g. with fvwm2 as window manager. - Is udisks involved ? It seems to be very eager to automount as soon as the CD contains data. When i kill its process, they come back quickly. - Is the XFCE (?) window involved which offers a file manger even for blank CDs when they get inserted ? - Is the way of attachment of the drive to the computer involved ? My TSSTcorp drive offers obsolete CD audio commands but is in a USB box, whereas the ASUS is directly at SATA. - Why does only Brasero invite the problem ? -------------------------------------------------------------------- Have a nice day :) Thomas
