I'm replying to myself. This turned out to be a hardware problem.
The DVD-R was connected with a 40-wire IDE cable. I replaced it with an 80-wire IDE cable at it worked fine. Jack Dodds > Speed set to 5540 KB/s > Starting to write CD/DVD at speed 4.0 in dummy force SAO mode for > single session. > Last chance to quit, starting dummy write 0 seconds. Operation starts. > trackno=0 > cdrecord.mmap: WARNING: Drive returns wrong startsec (0) using -150 > cdrecord.mmap: Success. write_g1: scsi sendcmd: no error > CDB: 2A 00 00 01 32 3F 00 00 1F 00 > status: 0x2 (CHECK CONDITION) > Sense Bytes: 70 00 04 00 00 00 00 0E 00 00 00 00 08 03 00 00 > Sense Key: 0x4 Hardware Error, Segment 0 > Sense Code: 0x08 Qual 0x03 (logical unit communication crc error > (ultra-dma/32)) Fru 0x0 > Sense flags: Blk 0 (not valid) > resid: 63488 > cmd finished after 0.001s timeout 200s > write track data: error after 160561152 bytes > cdrecord.mmap: A write error occured. > cdrecord.mmap: Please properly read the error message above. > -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]