dvdrecord errors on Sony DRU-530A

[Tom Starr]

TIA for reading, and for any thoughts or clues - Tom

This is an up-to-date RH 3AS on a 32-bit AMD.

The error below is:
dvdrecord: Input/output error. reserve track: scsi sendcmd: no error

If I omit -dao I get dvdrecord: Drive does not support TAO recording.

The drive is:
# dvdrecord -scanbus
dvdrtools v0.1.3
Portions (c) 2002 Red Hat, Inc.
Based on:
Cdrecord 1.11a15 (i386-redhat-linux-gnu) Copyright (C) 1995-2001 Jrg 
Schilling
Linux sg driver version: 3.1.25
Using libscg version 'schily-0.5'
dvdrecord: Warning: using inofficial libscg transport code version 
(schily-RH-scsi-linux-sg.c-1.69-RH-O_EXCL '@(#)scsi-linux-sg.c   1.69 
02/01/18 Copyright 1997 J. Schilling').
scsibus0:
0,0,0     0) 'TEAC    ' 'CD-W540E        ' '1.0B' Removable CD-ROM
0,1,0     1) 'SONY    ' 'DVD RW DRU-530A ' '1.0f' Removable CD-ROM
0,2,0     2) *
0,3,0     3) *
0,4,0     4) *
0,5,0     5) *
0,6,0     6) *
0,7,0     7) *
#

The iso file was created thus:
mkisofs -o work_current.iso -J -R -A -V -v work_current

The error results here:
# dvdrecord -v -dummy -dao speed=4 dev=0,1,0 work_current.iso
dvdrtools v0.1.3
Portions (c) 2002 Red Hat, Inc.
Based on:
Cdrecord 1.11a15 (i386-redhat-linux-gnu) Copyright (C) 1995-2001 Jrg 
Schilling
TOC Type: 1 = CD-ROM
scsidev: '0,1,0'
scsibus: 0 target: 1 lun: 0
Linux sg driver version: 3.1.25
Using libscg version 'schily-0.5'
dvdrecord: Warning: using inofficial libscg transport code version 
(schily-RH-scsi-linux-sg.c-1.69-RH-O_EXCL '@(#)scsi-linux
-sg.c   1.69 02/01/18 Copyright 1997 J. Schilling').
atapi: 1
Device type    : Removable CD-ROM
Version        : 0
Response Format: 1
Vendor_info    : 'SONY    '
Identifikation : 'DVD RW DRU-530A '
Revision       : '1.0f'
Device seems to be: Generic mmc2 DVD.
Using generic SCSI-3/mmc DVD-R(W) driver (mmc_mdvd).
Driver flags   : SWABAUDIO BURNFREE
Supported modes: PACKET SAO
Drive buf size : 1409024 = 1376 KB
FIFO size      : 4194304 = 4096 KB
Track 01: data  2015 MB
Total size:     2314 MB (229:15.73) = 1031680 sectors
Lout start:     2314 MB (229:17/55) = 1031680 sectors
Current Secsize: 2048
   ATIP start of lead in:  -150 (00:00/00)
Disk type:    unknown
Manuf. index: -1
Manufacturer: unknown (not in table)
Blocks total: 2295104 Blocks current: 2295104 Blocks remaining: 1263424
Starting to write CD/DVD at speed 4 in dummy mode for single session.
Last chance to quit, starting dummy write in 0 seconds. Operation starts.
Waiting for reader process to fill input buffer ... input buffer ready.
trackno=0
BURN-Free is OFF.
dvdrecord: Input/output error. reserve track: scsi sendcmd: no error
CDB:  53 00 00 00 00 00 0F BE 00 00
status: 0x2 (CHECK CONDITION)
Sense Bytes: 70 00 05 00 00 00 00 0A 00 00 00 00 24 00 00 00
Sense Key: 0x5 Illegal Request, Segment 0
Sense Code: 0x24 Qual 0x00 (invalid field in cdb) Fru 0x0
Sense flags: Blk 0 (not valid)
cmd finished after 0.000s timeout 200s
dvdrecord: Cannot open new session.
dvdrecord: fifo had 64 puts and 0 gets.
dvdrecord: fifo was 0 times empty and 0 times full, min fill was 100%.
#

Thanks again to anyone who has read this far!!