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Old 01-02-2006, 06:37 AM   #1
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Registered: Dec 2005
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Unable to blank CD-RW

Good morning people.
Recently i got a DVD-RW burner Philps PBDV1640P.
It writes succesfully DVDR and CDR,
but some problems with CD-RW medias.
I have tried more times to blank a CD-RW with commands:
# cdrecord -v speed=6 dev=/dev/hdc blank=fast
but the process never succesfully completed!
I have changed the CD-RW (passing from Verbatim to TDK)
but the problem arises again.
So, for you, is my drive defective or do you think that is a software problem?

My distro is Ubuntu 5.10 with kernel 2.6.14.

Following the output of cdrecord:

miles@MYGNUBOX:~$ cdrecord -v speed=6 dev=/dev/hdc blank=all
Cdrecord-Clone 2.01.01a01 (i686-pc-linux-gnu) Copyright (C) 1995-2004 Joerg Schi lling
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.

cdrecord: Warning: Running on Linux-2.6.14-miolinux2
cdrecord: There are unsettled issues with Linux-2.5 and newer.
cdrecord: If you have unexpected problems, please try Linux-2.4 or Solaris.
TOC Type: 1 = CD-ROM
cdrecord: Operation not permitted. WARNING: Cannot set RR-scheduler
cdrecord: Permission denied. WARNING: Cannot set priority using setpriority().
cdrecord: WARNING: This causes a high risk for buffer underruns.
scsidev: '/dev/hdc'
devname: '/dev/hdc'
scsibus: -2 target: -2 lun: -2
Warning: Open by 'devname' is unintentional and not supported.
Linux sg driver version: 3.5.27
Error: Cannot gain SYS_RAWIO capability.Is cdrecord installed SUID root?
: Operation not permitted
Using libscg version 'ubuntu-0.8ubuntu1'.
cdrecord: Warning: using inofficial version of libscg (ubuntu-0.8ubuntu1 '@(#)sc sitransp.c 1.91 04/06/17 Copyright 1988,1995,2000-2004 J. Schilling').
SCSI buffer size: 64512
atapi: 1
Device type : Removable CD-ROM
Version : 0
Response Format: 2
Capabilities :
Vendor_info : 'PHILIPS '
Identifikation : 'PBDV1640P '
Revision : 'B3.6'
Device seems to be: Generic mmc2 DVD-R/DVD-RW.
Current: 0x000A
Profile: 0x002B
Profile: 0x001B
Profile: 0x001A
Profile: 0x0014
Profile: 0x0011
Profile: 0x0010
Profile: 0x000A (current)
Profile: 0x0009
Profile: 0x0008
cdrecord: This version of cdrecord does not include DVD-R/DVD-RW support code.
cdrecord: See /usr/share/doc/cdrecord/README.DVD.Debian for details on DVD suppo rt.
Using generic SCSI-3/mmc CD-R/CD-RW driver (mmc_cdr).
Supported modes: TAO PACKET SAO SAO/R96R RAW/R16 RAW/R96R
Drive buf size : 1073152 = 1048 KB
Current Secsize: 2048
ATIP info from disk:
Indicated writing power: 2
Reference speed: 6
Is not unrestricted
Is erasable
Disk sub type: High speed Rewritable (CAV) media (1)
ATIP start of lead in: -11077 (97:34/23)
ATIP start of lead out: 359849 (79:59/74)
1T speed low: 4 1T speed high: 10
2T speed low: 2 2T speed high: 10
power mult factor: 2 6
recommended erase/write power: 5
A1 values: 24 2C DC
A2 values: 14 A4 4A
A3 values: 00 00 00
Disk type: Phase change
Manuf. index: 11
Manufacturer: Mitsubishi Chemical Corporation
Starting to write CD/DVD at speed 4 in real BLANK mode for single session.
Last chance to quit, starting real write 4 seconds.
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 03 00 00 00 00 12 00 00 00 00 72 01 00 00
Sense Key: 0x3 Medium Error, Segment 0
Sense Code: 0x72 Qual 0x01 (session fixation error writing lead-in) Fru 0x0
Sense flags: Blk 0 (not valid)
cmd finished after 229.531s timeout 9600s
cdrecord: Cannot blank disk, aborting.

Thank you very much.

Old 01-02-2006, 07:01 AM   #2
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Try using Sony CD-RW. I think they make the best. My Sony DVD-RW works 5 times faster with Sony CD-RW media than with generic store brand media.

You might also try using a gui front end to the CD-RW tools. I like K3b. It's just so easy I wouldn't even consider using the CD-RW tools directly.
Old 01-02-2006, 08:09 AM   #3
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Registered: Dec 2005
Posts: 12

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Thanks for the answer, stress_junkie.
I have just tried with K3B but i receive same "Medium Error" message (k3b erasing CD-RW tool uses cdrecord program...)! :-(
Besides, every CD-RW brand i have used gets the same result!
Please, Help me :|

Old 01-02-2006, 08:27 AM   #4
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Registered: Dec 2005
Location: Indiana
Distribution: RHEL/CentOS/SL 5 i386 and x86_64 pata for IDE in use
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Did you notice;

Error: Cannot gain SYS_RAWIO capability.Is cdrecord installed SUID root?
: Operation not permitted

So try something like;
chmod +s /usr/bin/cdrecord
Old 01-02-2006, 05:17 PM   #5
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Registered: Dec 2005
Posts: 12

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Ok guys, i have fixed that.
Simply with this command (from root)
#cdrecord -v speed=2 dev=/dev/hdc blank=fast
(in practice reducing re-writing speed)

Tahnk you and bye


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