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Old 02-11-2009, 07:44 PM   #1
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Unable to re-mount burned DVD

I have been trying to burn a maxwell DVD-R DVD on a Sony CD-ROM under RHEL4 O/S on a Pollywell box and re-mount with no success. It mounted once successfully then never suceeded after an eject. I'm running as root. Following is the output of my dvdrecord command ...

The DVD apparently burned successfully albeit with a warning ...

[root@REGSRVR_S01 burn]# /usr/bin/dvdrecord -driver=mmc_mdvd -dao dev=/dev/cdwriter test.iso 
INFO: dvdrecord's functionality is now replaced by cdrecord
Cdrecord-Clone 2.01-dvd (i686-pc-linux-gnu) Copyright (C) 1995-2004 Jörg Schilling
Note: This version is an unofficial (modified) version with DVD support
Note: and therefore may have bugs that are not present in the original.
Note: Please send bug reports or support requests to
Note: The author of cdrecord should not be bothered with problems in this version.
scsidev: '/dev/cdwriter'
devname: '/dev/cdwriter'
scsibus: -2 target: -2 lun: -2
Linux sg driver version: 3.5.27
Using libscg version 'schily-0.8'.
cdrecord: Warning: using inofficial libscg transport code version (schily - Red Hat-scsi-linux-sg.c-1.83-RH '@(#)scsi-linux-sg.c 1.83 04/05/20 Copyright 1997 J. Schilling').
Device type : Removable CD-ROM
Version : 0
Response Format: 2
Capabilities : 
Vendor_info : 'SONY '
Identifikation : 'DVD RW AW-Q170A '
Revision : '1.70'
Device seems to be: Generic mmc2 DVD-R/DVD-RW.
cdrecord: Found DVD media: using cdr_mdvd.
Using generic SCSI-3/mmc DVD-R(W) driver (mmc_mdvd).
Supported modes: PACKET SAO
Speed set to 8467 KB/s
Starting to write CD/DVD at speed 6.0 in real SAO mode for single session.
Last chance to quit, starting real write 0 seconds. Operation starts.
cdrecord: WARNING: Drive returns wrong startsec (0) using -150
Track 01: Total bytes read/written: 97462272/97462272 (47589 sectors).
Doing a mount immediately afterwards and a directory seemed to work fine ...
[root@REGSRVR_S01 burn]# 
[root@REGSRVR_S01 burn]# mount /media/cdrecorder
mount: block device /dev/hda is write-protected, mounting read-only
[root@REGSRVR_S01 burn]# cd /media/cdrecorder
[root@REGSRVR_S01 cdrecorder]# ls
But, after ejecting and another attempt to re-mount, things go awry. Any idea why ? I was able to read mount and read this same DVD on an HP box with a different CD-ROM apparently.

[root@REGSRVR_S01 cdrecorder]# cd ..
[root@REGSRVR_S01 media]# pwd
[root@REGSRVR_S01 burn]# umount /media/cdrecorder
[root@REGSRVR_S01 burn]# eject
[root@REGSRVR_S01 burn]# mount /media/cdrecorder
/dev/hda: Invalid argument
mount: block device /dev/hda is write-protected, mounting read-only
/dev/hda: Invalid argument
mount: you must specify the filesystem type
[root@REGSRVR_S01 burn]#
The following output from dmesg:

input: AT Translated Set 2 keyboard on isa0060/serio0
ISO 9660 Extensions: Microsoft Joliet Level 3
ISO 9660 Extensions: RRIP_1991A
SELinux: initialized (dev hda, type iso9660), uses genfs_contexts
FAT: bogus number of reserved sectors
VFS: Can't find a valid FAT filesystem on dev hda.
The following is dump of /etc/fstab file ...

[root@REGSRVR_S01 burn]# more /etc/fstab
# This file is edited by fstab-sync - see 'man fstab-sync' for details
LABEL=/                 /                       ext3    defaults        1 1
LABEL=/boot             /boot                   ext3    defaults        1 2
none                    /dev/pts                devpts  gid=5,mode=620  0 0
none                    /dev/shm                tmpfs   defaults        0 0
none                    /proc                   proc    defaults        0 0
none                    /sys                    sysfs   defaults        0 0
LABEL=SWAP-sda2         swap                    swap    defaults        0 0
# NOC Secret NFS Shares
nocfs:/share/dfs1        /usr/local/bcpl/noc/data/log/noc     nfs     intr,soft,
bg       0 0
nocfs:/share/dfs2        /usr/local/bcpl/noc/data/log/nds     nfs     intr,soft,
bg       0 0
/dev/hda                /media/cdrecorder       auto    pamconsole,fscontext=sys
tem_u:object_r:removable_t,user,exec,noauto,managed 0 0
/dev/fd0                /media/floppy           auto    pamconsole,fscontext=sys
tem_u:object_r:removable_t,user,exec,noauto,managed 0 0
I tried with a maxwell DVD+R with no success. It wouldn't even mount immediately after the burn.

I would appreciate any help on this matter.

Last edited by Penquin22; 02-11-2009 at 07:45 PM.
Old 02-11-2009, 08:16 PM   #2
Registered: Apr 2002
Location: in a fallen world
Distribution: slackware by choice, others too :} ... android.
Posts: 23,067
Blog Entries: 11

Rep: Reputation: 911Reputation: 911Reputation: 911Reputation: 911Reputation: 911Reputation: 911Reputation: 911Reputation: 911

And welcome to LQ!

Hmmm ... nothing too strange jumps out at me - but the SElinux entry in
the middle of it would make *me* see how it goes if I turned SE off all
together ...

And that was an amazing first post :)

Lots of diagnostics info, well done!


Last edited by Tinkster; 02-11-2009 at 08:18 PM.


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