David Brownell suggested that someone on this list might be able to help me.
I am having trouble burning DVDs using a USB 2.0-connected burner, and I
think USB might be the problem.

I have a desktop PC running linux (Asus A7V333, AMD Athlon XP 2100+, Red Hat
Linux 9 (2.4.20-20.9)).  I am trying to get xcdroast to work for burning
DVDs using an external DVD burner, the Plextor PX-708UF, which I have
connected through USB 2.0.

Long story short: I can burn DVDs using growisofs, but cdrecord-ProDVD
(required for xcdroast) dies because it cannot identify the blank disk type
(DVD+R, in my case).  Joerg Schilling (developer of cdrecord) has it working
on the IDE version of this drive (Plextor PX-708A), which makes me think
it's a USB problem.  Here is what happens:

==============
[EMAIL PROTECTED] xcdroast]# cdrecord-ProDVD.sh -atip dev=0,0,0
Cdrecord-ProDVD-Clone 2.01a24 (i686-pc-linux-gnu) Copyright (C) 
1995-2004 Jörg Schilling
Unlocked features: ProDVD Clone
Limited  features:
This copy of cdrecord is licensed for: 
private/research/educational_non-commercial_use
scsidev: '0,0,0'
scsibus: 0 target: 0 lun: 0
Linux sg driver version: 3.1.24
Using libscg version 'schily-0.8'.
Device type    : Removable CD-ROM
Version        : 2
Response Format: 1
Vendor_info    : 'PLEXTOR '
Identifikation : 'DVDR   PX-708A  '
Revision       : '1.04'
Device seems to be: Generic mmc2 DVD-R/DVD-RW.
Using generic SCSI-3/mmc-3 DVD+R driver (mmc_dvdplusr).
Driver flags   : DVD MMC-3 SWABAUDIO BURNFREE
Supported modes: TAO PACKET SAO SAO/R96P SAO/R96R RAW/R16 RAW/R96P RAW/R96R
cdrecord-ProDVD: Input/output error. read disk info: scsi sendcmd: no error
CDB:  51 00 00 00 00 00 00 00 24 00
status: 0x2 (CHECK CONDITION)
Sense Bytes: 70 00 00 00 00 00 00 0A 00 00 00 00 00 00 00 00
Sense Key: 0x0 No Additional Sense, Segment 0
Sense Code: 0x00 Qual 0x00 (no additional sense information) Fru 0x0
Sense flags: Blk 0 (not valid)
cmd finished after 0.002s timeout 240s
cdrecord-ProDVD: Cannot get disk type.
=================
Note that the drive is identified as a 708A because it has the same firmware
as that drive.

On Joerg's actual 708A, the end looks like this:
=================
Executing 'read disk info' command on Bus 0 Target 0, Lun 0 timeout 240s
CDB:  51 00 00 00 00 00 00 00 24 00
cmd finished after 0.000s timeout 240s
Got 36 (0x24), expecting 36 (0x24) bytes of data.
Received Data:  00 22 00 01 01 01 01 00 00 00 00 00 00 00 00 00 00 00 00 00
00 23 05 40 00 00 00 00 00 00 00 00 00 00 00 00
=================


As far as I can tell, there are no kernel errors during this process.
(Nothing in /var/log/messages--should I look somewhere else?)

Any thoughts?  Joerg's latest suggestion is to pop the drive out of the case
and hook it up with an IDE cable, but that kind of defeats the point of the
drive for me.  If you're interested at all in the discourse on this, see the
cdwrite January archive staring with:

http://lists.debian.org/cdwrite/2004/cdwrite-200401/msg00145.html

I don't subscribe to this list; please cc me.

Thanks,
Tom




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