First the new udftools (1.0.0b2) works fine, I can now create cdrw. I use a 2.4.18 kernel with last packet-patch, in both up and smp configuration. I don't have the same errors now when I try to write to the disk, here are the messages : Mar 7 00:34:11 Linux1 kernel: pktcdvd: v0.0.2p 03/03/2002 Jens Axboe (axboe@suse.de) Mar 7 00:34:25 Linux1 kernel: Attached scsi CD-ROM sr0 at scsi0, channel 0, id 3, lun 0 Mar 7 00:34:25 Linux1 kernel: ncr53c810a-0-<3,*>: FAST- 10 SCSI 10.0 MB/s (100 ns, offset 7) Mar 7 00:34:25 Linux1 kernel: sr0: scsi3-mmc drive: 40x/40x writer cd/rw xa/form2 cdda tray Mar 7 00:34:25 Linux1 kernel: Uniform CD-ROM driver Revision: 3.12 Mar 7 00:34:25 Linux1 kernel: pktcdvd: writer sr0 sucessfully registered Mar 7 00:34:38 Linux1 kernel: pktcdvd: speed (R/W) 1/1 Mar 7 00:34:38 Linux1 kernel: udf: registering filesystem Mar 7 00:34:38 Linux1 kernel: pktcdvd: inserted media is CD-RW Mar 7 00:34:38 Linux1 kernel: pktcdvd: Fixed packets, 32 blocks, Mode-2 disc Mar 7 00:34:38 Linux1 kernel: pktcdvd: speed (R/W) 24/16 Mar 7 00:34:38 Linux1 kernel: pktcdvd: 551488kB available on disc Mar 7 00:34:39 Linux1 kernel: UDF-fs INFO UDF 0.9.5-rw (2001/10/10) Mounting volume 'LinuxUDF', timestamp 2002/03/06 22:54 (103c) Mar 7 00:35:10 Linux1 kernel: ncr53c810a-0-<3,0>: extraneous data discarded. Mar 7 00:35:10 Linux1 kernel: ncr53c810a-0-<3,0>: COMMAND FAILED (89 0) @dfd4d800. Mar 7 00:35:10 Linux1 kernel: scsi0 channel 0 : resetting for second half of retries. Mar 7 00:35:10 Linux1 kernel: SCSI bus is being reset for host 0 channel 0. Mar 7 00:35:10 Linux1 kernel: ncr53c8xx_reset: pid=97 reset_flags=1 serial_number=0 serial_number_at_timeout=0 Mar 7 00:35:10 Linux1 kernel: scsi0: device driver called scsi_done() for a synchronous reset. Mar 7 00:35:10 Linux1 kernel: ncr53c810a-0-<3,*>: FAST- 10 SCSI 10.0 MB/s (100 ns, offset 7) Mar 7 00:35:20 Linux1 kernel: I/O error: dev 0b:00, sector 1280 Mar 7 00:35:20 Linux1 kernel: pktcdvd: pktcdvd0: WRITE error sector 1280 Mar 7 00:35:20 Linux1 kernel: pktcdvd: pktcdvd0: WRITE error sector 1284 Mar 7 00:35:20 Linux1 kernel: pktcdvd: pktcdvd0: WRITE error sector 1288 Mar 7 00:35:20 Linux1 kernel: pktcdvd: pktcdvd0: WRITE error sector 1292 ... ar 7 00:35:20 Linux1 kernel: pktcdvd: pktcdvd0: WRITE error sec ar 7 00:35:20 Linux1 kernel: I/O error: dev 0b:00, sector 5640 ar 7 00:35:20 Linux1 kernel: Ignoring read error on sector:5640 ar 7 00:35:20 Linux1 kernel: Ignoring read error on sector:5644 ar 7 00:35:20 Linux1 kernel: Ignoring read error on sector:5648 Mar 7 00:35:21 Linux1 kernel: Ignoring read error on sector:5752 Mar 7 00:35:21 Linux1 kernel: Ignoring read error on sector:5756 Mar 7 00:35:21 Linux1 kernel: I/O error: dev 0b:00, sector 5632 Mar 7 00:35:21 Linux1 kernel: pktcdvd: pktcdvd0: WRITE error sector 5632 Mar 7 00:35:21 Linux1 kernel: pktcdvd: pktcdvd0: WRITE error sector 5636 Mar 7 00:35:21 Linux1 kernel: pktcdvd: pktcdvd0: WRITE error sector 5640 ... The problem is here : Mar 7 00:35:10 Linux1 kernel: ncr53c810a-0-<3,0>: extraneous data discarded. Mar 7 00:35:10 Linux1 kernel: ncr53c810a-0-<3,0>: COMMAND FAILED (89 0) @dfd4d800. Mar 7 00:35:10 Linux1 kernel: scsi0 channel 0 : resetting for second half of retries. Mar 7 00:35:10 Linux1 kernel: SCSI bus is being reset for host 0 channel 0. A strange command is sent to the scsi controler, and the scsi bus is reset. After all the commands fail. The problem occurs each time I try to write to the disk, but after a variable time (30 seconds to 5 minutes). After If I try to read the disk I have an I/O error message. The media used for this test is a highspeed CDRW, and works fine under win2k with InCD. Francois ROY -------------- Profitez de l'offre spéciale Tiscali Liberty Surf ! 50% de temps en plus pendant 3 mois sur tous les forfaits Internet. http://register.libertysurf.fr/subscribe_fr/signup.php3