problems burning data DVDs under Centos 4.6

[gary80920]

I'm having problems with reading data DVDs that have been burned with either cdrecord or growisosfs from ISO images created with mkisofs.

I have a script that creates a softlink to each file that I want in the ISO file.
- cd to temporary directory
- create softlinks via a loop using command "ln source_file_name link_name"

Then the following command is used to create the ISO image
mkisofs -l -T -J -R -A "apache logs $start through $end" -V "apache $start - $end" -o /tmp/apache_$start-$end.iso .

To burn the DVD I have used the following commands
- growisofs -Z /dev/hdd=apache.iso
- cdrecord dev=ATA:1,1,0 driveropts=burnfree -sao -v apache.iso
No errors are encountered during the burn session.

However, if I attempt to mount the DVD
[root@xxx log]# mount /dev/hdd /mnt/tmp
/dev/hdd: Invalid argument
mount: block device /dev/hdd is write-protected, mounting read-only
/dev/hdd: Invalid argument
mount: you must specify the filesystem type

Specifying "-t iso9660", "-t auto", "-t vfat" does not help.

In /var/log/messages, the following is seen when attempting to mount the DVD:
Sep 7 13:30:35 foobar kernel: FAT: bogus number of reserved sectors
Sep 7 13:30:35 foobar kernel: VFS: Can't find a valid FAT filesystem on dev hdd.

In /var/log/messages the following entries are made when the system is booted
[root@xxx log]# grep hdd messages.2
Aug 30 12:01:20 xxx kernel: ide1: BM-DMA at 0x6c68-0x6c6f, BIOS settings: hdc:pio, hdd:DMA
Aug 30 12:01:20 xxx kernel: hdd: SONY DVD RW AW-Q170A, ATAPI CD/DVD-ROM drive
Aug 30 12:01:20 xxx kernel: hdd: ATAPI 48X DVD-ROM DVD-R CD-R/RW drive, 2048kB Cache, UDMA(66)
Aug 30 12:01:35 xxx fstab-sync[4175]: added mount point /media/cdrecorder for /dev/hdd

I am able to mount the DVD successfully under windows.

Burning the DVD using Nautilis gives me the same results.

What am I missing?

Thanks!

[gary80920]

Some more information:

If I connect a DVDwriter via USB, the disk is read and mounted.

/var/log/messages
Sep 7 14:44:47 xxx kernel: usb 1-3: new high speed USB device using address 2
Sep 7 14:44:47 xxx kernel: Initializing USB Mass Storage driver...
Sep 7 14:44:47 xxx kernel: scsi1 : SCSI emulation for USB Mass Storage devices
Sep 7 14:44:47 xxx kernel: Vendor: TSSTcorp Model: CDDVDW SH-S202N Rev: SB01
Sep 7 14:44:47 xxx kernel: Type: CD-ROM ANSI SCSI revision: 02
Sep 7 14:44:47 xxx kernel: usbcore: registered new driver usb-storage
Sep 7 14:44:47 xxx kernel: USB Mass Storage support registered.
Sep 7 14:44:47 xxx scsi.agent[5276]: cdrom at /devices/pci0000:00/0000:00:1e.0/0000:04:02.3/usb1/1-3/1-3:1.0/host1/target1:0:0/1:0:0:0
Sep 7 14:44:48 xxx kernel: sr0: scsi3-mmc drive: 48x/48x writer dvd-ram cd/rw xa/form2 cdda tray
Sep 7 14:44:48 xxx fstab-sync[5343]: added mount point /media/cdrecorder1 for /dev/scd0
Sep 7 14:45:08 xxx kernel: cdrom: sr0: mrw address space DMA selected

/etc/mtab
/dev/scd0 /media/cdrecorder1 iso9660 ro,nosuid,nodev,user=xxx 0 0

/etc/grub.conf
# grub.conf generated by anaconda
#
# Note that you do not have to rerun grub after making changes to this file
# NOTICE: You have a /boot partition. This means that
# all kernel and initrd paths are relative to /boot/, eg.
# root (hd0,0)
# kernel /vmlinuz-version ro root=/dev/hda3
# initrd /initrd-version.img
#boot=/dev/hda
default=2
timeout=20
splashimage=(hd0,0)/grub/splash.xpm.gz
#
title CentOS (2.6.9-67.ELsmp)
root (hd0,0)
kernel /vmlinuz-2.6.9-67.ELsmp ro root=LABEL=/
initrd /initrd-2.6.9-67.ELsmp.img

[gary80920]

[root@xxx log]# hdparm -i /dev/hdd

/dev/hdd:

Model=SONY DVD RW AW-Q170A, FwRev=1.70, SerialNo=
Config={ Fixed Removeable DTR10Mbs nonMagnetic }
RawCHS=0/0/0, TrkSize=0, SectSize=0, ECCbytes=0
BuffType=unknown, BuffSize=0kB, MaxMultSect=0
(maybe): CurCHS=0/0/0, CurSects=0, LBA=yes, LBAsects=0
IORDY=yes, tPIO={min:120,w/IORDY:120}, tDMA={min:120,rec:120}
PIO modes: pio0 pio1 pio2 pio3 pio4
DMA modes: mdma0 mdma1 mdma2
UDMA modes: udma0 udma1 udma2 udma3 *udma4
AdvancedPM=no

* signifies the current active mode

[root@xxx log]# cat /proc/ide/hdd/driver
ide-cdrom version 4.61

[gerald_clark]

After burning the DVD, be sure to manually eject and reload the disk to reset the DVD writer.
There should be entries in /media.
mount /media/cdrecorder

[gary80920]

Hey Gerald,

Thanks for the feedback.

I did the manual ejection, and as noted, I have tried several different burn programs to boot.

In addition, I also took the ISO image and burned it on my Windows XP system using Nero with the same results when trying to mount the DVD on /dev/hdd.

I've done some further reading and at one point it was recommended to modify the boot command to include "hdd=ide-scsi". Is this still the recommended practice for Centos 4.

Regards,
Gary

[gerald_clark]

Except for the model number, my hdparm looks the same, and my drive works.
Try replacing the drive.