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Having trouble installing a piece of hardware? Want to know if that peripheral is compatible with Linux?

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Old 12-31-2003, 12:18 PM   #1
jd20878
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Registered: Aug 2003
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linux says my CD writer is read-only


I've got a cd writer which I'm trying to properly configure. I have a /mnt/cdrw dir which points to /dev/scd0. My fstab file looks like this
LABEL=/ / ext3 defaults 1 1
LABEL=/boot /boot ext3 defaults 1 2
none /dev/pts devpts gid=5,mode=620 0 0
none /proc proc defaults 0 0
none /dev/shm tmpfs defaults 0 0
/dev/hda3 swap swap defaults 0 0
/dev/fd0 /mnt/floppy auto noauto,user,kudzu,rw,exec,umask=000 0 0
/dev/cdrom /mnt/cdrom iso9660 owner,ro,mode=444,noauto 0 0
/dev/cdrw /mnt/cdrw iso9660 owner,rw,mode=444,noauto 0 0

my grub.conf file has been appended with hdc=ide-scsi. And /dev/scd0, /dev/hdc, and /mnt/cdrw all have read write and execute privilages. Yet, when I mount the cdrw I get the following message:

mount: block device /dev/cdrw is write-protected, mounting read-only

Does anyone know what I need to do to fix this? Any help would be greatly appreciated.

Jason
 
Old 12-31-2003, 01:00 PM   #2
cexshun
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Registered: Jan 2003
Distribution: Ubuntu Hardy Heron
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What that means is that you cannot mount /dev/cdrw, and cp or mv files to it. A cd-rw still MUST use cd burning software.
 
Old 12-31-2003, 01:21 PM   #3
jd20878
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Registered: Aug 2003
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cexshun,

I'm not quit sure what you mean. If i try to use cdrecord to burn a file to the drive i get the following:

[root@localhost jason]# cdrecord -v dev=0,0,0 nix.jpg

Cdrecord 2.0 (i686-pc-linux-gnu) Copyright (C) 1995-2002 Jrg Schilling
TOC Type: 1 = CD-ROM
scsidev: '0,0,0'
scsibus: 0 target: 0 lun: 0
Linux sg driver version: 3.1.24
Using libscg version 'schily-0.7'
atapi: 1
Device type : Removable CD-ROM
Version : 0
Response Format: 1
Vendor_info : 'MITSUMI '
Identifikation : 'CR-4804TE '
Revision : '2.6C'
Device seems to be: Philips CDD-522.
Using generic SCSI-3/mmc CD-R driver (mmc_cdr).
Driver flags : MMC SWABAUDIO
Supported modes: TAO PACKET RAW/R16 RAW/R96R
Drive buf size : 1343488 = 1312 KB
FIFO size : 4194304 = 4096 KB
Track 01: data 0 MB padsize: 532 KB
Total size: 0 MB (00:04.02) = 302 sectors
Lout start: 1 MB (00:06/02) = 302 sectors
Current Secsize: 2048
ATIP info from disk:
Indicated writing power: 5
Is not unrestricted
Is not erasable
Disk sub type: Medium Type A, high Beta category (A+) (3)
ATIP start of lead in: -11324 (97:31/01)
ATIP start of lead out: 336225 (74:45/00)
Disk type: Long strategy type (Cyanine, AZO or similar)
Manuf. index: 22
Manufacturer: Ritek Co.
Blocks total: 336225 Blocks current: 336225 Blocks remaining: 335923
Starting to write CD/DVD at speed 4 in real TAO mode for single session.
Last chance to quit, starting real write 0 seconds. Operation starts.
Waiting for reader process to fill input buffer ... input buffer ready.
Performing OPC...
Starting new track at sector: 0
Track 01: 0 of 0 MB written.
WARNING: padding up to secsize.
Track 01: writing 532 KB of pad data.
Track 01: Total bytes read/written: 69572/614400 (300 sectors).
Writing time: 4.053s
Average write speed 1.4x.
Fixating...
Fixating time: 60.398s
cdrecord: fifo had 2 puts and 2 gets.
cdrecord: fifo was 0 times empty and 0 times full, min fill was 100%.

The cd writer seems to doing something. When the process is finished the disk looks like something was written to it but there's nothing on it.
 
Old 12-31-2003, 01:40 PM   #4
jd20878
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Registered: Aug 2003
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One more thing, when i try to mount the drive using mount -r -t iso9660 /dev/cdrw /mnt/cdrw I get :

mount: wrong fs type, bad option, bad superblock on /dev/cdrw,
or too many mounted file systems

I've tried three different brands of disks and still no luck.

What else might be causing this?
 
  


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