My specs/system is here:

CPUs: 8
CPU Model Name: Intel(R) Core(TM) i7 CPU @ 9200 @ 2.67GHz
Frequency: 1596.000 MHz
L2 cache: 8192 KB

Release: Ubuntu 10.04 (lucid)
GNOME 2.30.0
Kernel 2.6.32-22-generic

(New DVD-RW)
SCSi device scsi0
vendor optiarc
model dvd rw ad-7241s

(Old DVD-R)
SCSi device scsi0
vendor ATAPI
model ihas324 a

Anymore issues or problems, I will answer you ASAP. My SATA jacks are different because I needed to install my new DVD-RW drive. Thus, 3 SATA jacks, not 2 now.
:~$ dev/scsi0
bash: dev/scsi0: No such file or directory
:~$ dev/cdrom0
bash: dev/cdrom0: No such file or directory

What's the problem, now? My DVD-RW is not recognize my ifuse anymore.

Does it say in dmesg what device it has been assigned to? Sometimes it's something like /dev/scd0 or /dev/sr0.

$ /dev/scd0
bash: /dev/scd0: Permission denied
$ /dev/sr0
bash: /dev/sr0: Permission denied
There is no application installed for block device files
Name: scd0
Type: Link to block device (inode/blockdevice)

What's the program, then?

Is it seen at all...

In addition to "dmesg", I would try the command "lshw" to see if the drive is present.

Does your BIOS list the DVD drive and is it seen on your POST screen?

Did you try to boot a newer linux live-cd to see if it is recognized by another linux OS?

If neither of these show your device, I would check my installation - connections, jumpers, etc.

In addition, what motherboard or laptop do you have?

In addition to "dmesg", I would try the command "lshw" to see if the drive is present.

-cdrom:0
description: DVD-RAM writer
product: DVD RW AD-7241S
vendor: Optiarc
physical id: 0.0.0
bus info: scsi@0:0.0.0
logical name: /dev/cdrom1
logical name: /dev/cdrw1
logical name: /dev/dvd1
logical name: /dev/dvdrw1
logical name: /dev/scd0
logical name: /dev/sr0
version: 1.03
capabilities: removable audio cd-r cd-rw dvd dvd-r dvd-ram
configuration: ansiversion=5 status=ready
*-medium
physical id: 0
logical name: /dev/cdrom1
*-cdrom:1
description: DVD-RAM writer
product: iHAS324 A
vendor: ATAPI
physical id: 0.1.0
bus info: scsi@0:0.1.0
logical name: /dev/cdrom
logical name: /dev/cdrw
logical name: /dev/dvd
logical name: /dev/dvdrw
logical name: /dev/scd1
logical name: /dev/sr1
version: BL1H
capabilities: removable audio cd-r cd-rw dvd dvd-r dvd-ram
configuration: ansiversion=5 status=ready
*-medium
physical id: 0
logical name: /dev/cdrom


Does your BIOS list the DVD drive and is it seen on your POST screen?

BIOS: SOX5810J.86A.2127.2008.0914.1638
SATA PORT 0: OPTIARC DVD RW A-ATAPI (NEW DVD RW)
SATA PORT 2: ATAPI IH BS324 ATAPI (OLD DVD RW)
SATA PORT 4: 1000.2 GB (HARD DRIVE)
SATA 1,3, 5 ARE NOT INSTALLED

POST:GRUB LOADER
MANY I/O ERRORS. (20-25 ERRORS)

I will try the live-CD after my thread.

My motherboard:
Intel Desktop Board DX58SO Extreme Series - motherboard - ATX - iX58 - LGA1366 Socket

Thanks again.

POST: Grub Loader
error request, I/O error, dev, sr1, sector 0
Many errors on the start-up.

You think it's the SATA jacks? I removed the SATA connection for the old DVD-RW for the new DVD-RW and switched the hard drive to another SATA. What do you think?

I opened my new DVD-RW and this happened:
Could not open the location: “cdda://sr1/'
Failed to execute child process "sound-juicer" (No such file or directory)
I never opened the "sound-juicer" before.

I don't know...

You could try a using a live-cd while changing the order of the controller connections to the two SATA DVD drives and the HDD. Try the first three with the HDD as the third, mimicking Master-Slave, Master on a PATA controller.

The motherboard manual tells me that this board has RAID settings in the BIOS and an Auto-Configuration Option for the I/O controller. I would check the RAID settings for AHCI, not RAID, and choose manual configuration for I/O.

Upgrading to the latest BIOS might also be a very good idea.

As the manual states:
It does seems that the DVD disks are found by linux as devices, but then linux becomes confused. The I/O problems shown might be caused by the controller settings.

Also, try the command "lsmod" to see what kernel modules are loaded for the drives.