[root@justine popfile]# cdrwtool -d /dev/scd1 -q -t 1 using device /dev/scd1 setting speed to 1 1568KB internal buffer setting write speed to 1x wait_cmd: Invalid argument Command failed: 55 10 00 00 00 00 00 00 3c 00 00 00 - sense 05.26.00 00 00 00 00 00 00 00 00 05 32 20 27 0a 00 00 00 20 00 00 00 00 20 00 96 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 08 00 mode_select: Illegal seek set_write I run RedHat 7.3, 2.4.19 with patch, and I ran pktsetup. It's a DVD-R(W) Pioneer. CD-R burning with xcdroast works well - I try to get the Packet stuff going now. THANKS THANKS THANKS Michael PS: Here the info command: [root@justine popfile]# cdrwtool -d /dev/scd1 -i using device /dev/scd1 1568KB internal buffer setting write speed to 12x DISC INFO: erasable : Yes border = 0 Disc status = 0 number of first track = 1 number of sessions = 1 number of tracks = 1 status of last track = 1 uru = 1 did_v = 0 dbc_v = 0 disc type = 0 disc_id = 0 lead_in = 00:00:00 (0) lead_out = 00:00:00 (0) OPC entries = 0 TRACK INFO: Track 1 track_number = 1 session_number = 1 damage = 0 copy = 0 track_mode = 4 Rt = 0 blank = 1 packet = 1 fp = 0 data_mode = 1 lra_v = 0 nwa_v = 1 track_start = 0 next_writable = 0 last_recorded = 0 free_blocks = 2297888 packet_size = 16 track_size = 2297888 (4595776KB)