e questo quello che mi dice se cerco di cancellare un cd-rw:

debianix:/# cdrecord -v dev=ATA:1,0,0 speed=1 blank=all
Cdrecord-Clone 2.01a34 (i686-pc-linux-gnu) Copyright (C) 1995-2004 Jörg Schilling
NOTE: this version of cdrecord is an inofficial (modified) release of cdrecord
and thus may have bugs that are not present in the original version.
Please send bug reports and support requests to <cdrtools@packages.debian.org>.
The original author should not be bothered with problems of this version.

TOC Type: 1 = CD-ROM
scsidev: 'ATA:1,0,0'
devname: 'ATA'
scsibus: 1 target: 0 lun: 0
Warning: Using badly designed ATAPI via /dev/hd* interface.
Linux sg driver version: 3.5.27
Using libscg version 'schily-0.8'.
SCSI buffer size: 64512
atapi: -1
Device type : Removable CD-ROM
Version : 0
Response Format: 2
Capabilities :
Vendor_info : 'QSI '
Identifikation : 'CDRW/DVD SBW-241'
Revision : 'VX08'
Device seems to be: Generic mmc2 DVD-ROM.
Current: 0x000A
Profile: 0x0010
Profile: 0x0008
Profile: 0x0009
Profile: 0x000A (current)
Using generic SCSI-3/mmc CD-R/CD-RW driver (mmc_cdr).
Driver flags : MMC-2 SWABAUDIO BURNFREE
Supported modes: TAO PACKET SAO SAO/R96P SAO/R96R RAW/R16 RAW/R96P RAW/R96R
Drive buf size : 1605632 = 1568 KB
Current Secsize: 2048
ATIP info from disk:
Indicated writing power: 3
Reference speed: 6
Is not unrestricted
Is erasable
Disk sub type: High speed Rewritable (CAV) media (1)
ATIP start of lead in: -11635 (97:26/65)
ATIP start of lead out: 359849 (79:59/74)
1T speed low: 4 1T speed high: 10
2T speed low: 4 2T speed high: 0 (reserved val 6)
power mult factor: 1 5
recommended erase/write power: 5
A1 values: 24 1A D8
A2 values: 26 B2 4A
Disk type: Phase change
Manuf. index: 3
Manufacturer: CMC Magnetics Corporation
Starting to write CD/DVD at speed 4 in real BLANK mode for single session.
Last chance to quit, starting real write 0 seconds. Operation starts.
Performing OPC...
Blanking entire disk
cdrecord: Success. blank unit: scsi sendcmd: no error
CDB: A1 00 00 00 00 00 00 00 00 00 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 9600s
cdrecord: Cannot blank disk, aborting.