CD in drive, but Ubuntu says no medium found :-(

[NNNNNNNNNN1515]

My computer has two cd drives: a cd/dvd rom drive, and a cd-rw drive. When I put a cd in my cd/dvd rom drive, everything works well. The cd appears on my desktop and in file broswer and I have no trouble accessing the contents of the disc, or playing audio cds. My cd-rw drive, on the otherhand, does not want to behave. If I put a cd-r inside of it, Brasero reports "no disc" and will not burn. If I put a regular data cd inside of it, the cd does not show up in file browser (the cd-rw drive is in file browser, but it doesn't show the cd. It only says "cd-rw drive"). When I try to mount it, either in file browser, or in terminal, ubuntu says no medium found. I know there is medium in the drive. I put it there!

I had a similar problem before with my other drive, but that was my own fault. I didnt realize my cd was bad. This time, however, I put the same data cd in both drives. My cd/dvd rom will behave properly, but the same disc is not recognized in my cd-rw drive.

My question to the ubuntu community is: What steps should I take to diagnose the problem? Why won't ubuntu mount my cds? The drive was working before I switched to ubuntu. I doubt the drive has a problem. Any advice?

If it helps, here is the output from my /ect/fstab

# /etc/fstab: static file system information.
#
# <file system> <mount point> <type> <options> <dump> <pass>
proc /proc proc defaults 0 0
# /dev/sda1
UUID=a5716e71-cff2-4a12-be80-0ae76a3d2e49 / ext3 relatime,errors=remount-ro 0 1
# /dev/sda5
UUID=33da9863-d8de-4021-a18c-c6ad9fe267b6 none swap sw 0 0
/dev/scd0 /media/cdrom0 udf,iso9660 user,noauto,exec,utf8 0 0
/dev/scd1 /media/cdrom1 udf,iso9660 user,noauto,exec,utf8 0 0
/dev/fd0 /media/floppy0 auto rw,user,noauto,exec,utf8 0 0

scd0 is my cd/dvd drive. scd1 is my cd-rw drive. Does anything look wrong in my fstab? If not, what other things can I do to diagnose this problem? Any help would be appreciated.


Update:

I also remembered previously using lshw to diagnose a problem with a cd drive. Don't know if this is any help, but here is what my hardware looks like:

description: Computer
product: Springdale-G
width: 32 bits
capabilities: smbios-2.3 dmi-2.3 smp-1.4 smp
configuration: boot=normal cpus=1 uuid=A0550751-F5DE-11D8-84F6-00E018874439
*-core
description: Motherboard
product: D865PERL
vendor: Intel Corporation
physical id: 0
version: AAC27646-213
serial: BTRL43501306
*-firmware
description: BIOS
vendor: Intel Corp.
physical id: 0
version: RL86510A.86A.0075.P15.0404021333 (04/02/2004)
size: 64KiB
capacity: 448KiB
capabilities: pci pnp apm upgrade shadowing cdboot bootselect edd int13floppynec int13floppytoshiba int13floppy360 int13floppy1200 int13floppy720 int13floppy2880 int5printscreen int9keyboard int14serial int17printer int10video acpi usb agp ls120boot zipboot biosbootspecification netboot
*-cpu
description: CPU
product: Intel(R) Pentium(R) 4 CPU 2.80GHz
vendor: Intel Corp.
physical id: 4
bus info: cpu@0
version: 15.3.3
serial: 0000-0F33-0000-0000-0000-0000
slot: J2E1
size: 2800MHz
capacity: 3060MHz
width: 32 bits
clock: 200MHz
capabilities: boot fpu fpu_exception wp vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe constant_tsc pebs bts sync_rdtsc pni monitor ds_cpl cid
configuration: id=0
*-cache:0 DISABLED
description: L1 cache
physical id: 5
slot: None
capabilities: pipeline-burst internal varies data
*-cache:1
description: L2 cache
physical id: 6
slot: None
size: 1MiB
capacity: 1MiB
capabilities: pipeline-burst internal varies unified
*-logicalcpu:0
description: Logical CPU
physical id: 0.1
width: 32 bits
capabilities: logical
*-logicalcpu:1
description: Logical CPU
physical id: 0.2
width: 32 bits
capabilities: logical
*-memory
description: System Memory
physical id: 3d
slot: System board or motherboard
size: 768MiB
*-bank:0
description: DIMM DDR Synchronous 266 MHz (3.8 ns) [empty]
product: PartNum1
vendor: Manufacturer1
physical id: 0
serial: SerNum1
slot: J5G1
width: 64 bits
clock: 266MHz (3.8ns)
*-bank:1
description: DIMM DDR Synchronous 266 MHz (3.8 ns) [empty]
product: PartNum2
vendor: Manufacturer2
physical id: 1
serial: SerNum2
slot: J5G2
width: 64 bits
clock: 266MHz (3.8ns)
*-bank:2
description: DIMM DDR Synchronous 266 MHz (3.8 ns)
product: PartNum3
vendor: Manufacturer3
physical id: 2
serial: SerNum3
slot: J5H1
size: 256MiB
width: 64 bits
clock: 266MHz (3.8ns)
*-bank:3
description: DIMM DDR Synchronous 266 MHz (3.8 ns)
product: PartNum4
vendor: Manufacturer4
physical id: 3
serial: SerNum4
slot: J5H2
size: 512MiB
width: 64 bits
clock: 266MHz (3.8ns)
*-pci
description: Host bridge
product: 82865G/PE/P DRAM Controller/Host-Hub Interface
vendor: Intel Corporation
physical id: 100
bus info: pci@0000:00:00.0
version: 02
width: 32 bits
clock: 33MHz
configuration: driver=agpgart-intel module=intel_agp
*-pci:0
description: PCI bridge
product: 82865G/PE/P PCI to AGP Controller
vendor: Intel Corporation
physical id: 1
bus info: pci@0000:00:01.0
version: 02
width: 32 bits
clock: 66MHz
capabilities: pci normal_decode bus_master
*-display UNCLAIMED
description: VGA compatible controller
product: Radeon RV100 QY [Radeon 7000/VE]
vendor: ATI Technologies Inc
physical id: 0
bus info: pci@0000:01:00.0
version: 00
width: 32 bits
clock: 66MHz
capabilities: agp agp-2.0 pm vga_controller bus_master cap_list
configuration: latency=32 mingnt=8
*-usb:0
description: USB Controller
product: 82801EB/ER (ICH5/ICH5R) USB UHCI Controller #1
vendor: Intel Corporation
physical id: 1d
bus info: pci@0000:00:1d.0
version: 02
width: 32 bits
clock: 33MHz
capabilities: uhci bus_master
configuration: driver=uhci_hcd latency=0 module=uhci_hcd
*-usb:1
description: USB Controller
product: 82801EB/ER (ICH5/ICH5R) USB UHCI Controller #2
vendor: Intel Corporation
physical id: 1d.1
bus info: pci@0000:00:1d.1
version: 02
width: 32 bits
clock: 33MHz
capabilities: uhci bus_master
configuration: driver=uhci_hcd latency=0 module=uhci_hcd
*-usb:2
description: USB Controller
product: 82801EB/ER (ICH5/ICH5R) USB UHCI Controller #3
vendor: Intel Corporation
physical id: 1d.2
bus info: pci@0000:00:1d.2
version: 02
width: 32 bits
clock: 33MHz
capabilities: uhci bus_master
configuration: driver=uhci_hcd latency=0 module=uhci_hcd
*-usb:3
description: USB Controller
product: 82801EB/ER (ICH5/ICH5R) USB UHCI Controller #4
vendor: Intel Corporation
physical id: 1d.3
bus info: pci@0000:00:1d.3
version: 02
width: 32 bits
clock: 33MHz
capabilities: uhci bus_master
configuration: driver=uhci_hcd latency=0 module=uhci_hcd
*-usb:4
description: USB Controller
product: 82801EB/ER (ICH5/ICH5R) USB2 EHCI Controller
vendor: Intel Corporation
physical id: 1d.7
bus info: pci@0000:00:1d.7
version: 02
width: 32 bits
clock: 33MHz
capabilities: pm debug ehci bus_master cap_list
configuration: driver=ehci_hcd latency=0 module=ehci_hcd
*-pci:1
description: PCI bridge
product: 82801 PCI Bridge
vendor: Intel Corporation
physical id: 1e
bus info: pci@0000:00:1e.0
version: c2
width: 32 bits
clock: 33MHz
capabilities: pci normal_decode bus_master
*-firewire
description: FireWire (IEEE 1394)
product: FW323
vendor: Agere Systems
physical id: 7
bus info: pci@0000:02:07.0
version: 61
width: 32 bits
clock: 33MHz
capabilities: pm ohci bus_master cap_list
configuration: driver=ohci1394 latency=32 maxlatency=24 mingnt=12 module=ohci1394
*-network
description: Ethernet interface
product: 82562EZ 10/100 Ethernet Controller
vendor: Intel Corporation
physical id: 8
bus info: pci@0000:02:08.0
logical name: eth0
version: 01
serial: 00:11:11:57:e8:03
size: 100MB/s
capacity: 100MB/s
width: 32 bits
clock: 33MHz
capabilities: pm bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=e100 driverversion=3.5.23-k4-NAPI duplex=full firmware=N/A ip=192.168.1.100 latency=32 link=yes maxlatency=56 mingnt=8 module=e100 multicast=yes port=MII speed=100MB/s
*-isa
description: ISA bridge
product: 82801EB/ER (ICH5/ICH5R) LPC Interface Bridge
vendor: Intel Corporation
physical id: 1f
bus info: pci@0000:00:1f.0
version: 02
width: 32 bits
clock: 33MHz
capabilities: isa bus_master
configuration: latency=0
*-ide:0
description: IDE interface
product: 82801EB/ER (ICH5/ICH5R) IDE Controller
vendor: Intel Corporation
physical id: 1f.1
bus info: pci@0000:00:1f.1
logical name: scsi0
logical name: scsi1
version: 02
width: 32 bits
clock: 33MHz
capabilities: ide bus_master emulated
configuration: driver=ata_piix latency=0 module=ata_piix
*-disk
description: ATA Disk
product: Maxtor 6L080P0
vendor: Maxtor
physical id: 0
bus info: scsi@0:0.0.0
logical name: /dev/sda
version: BAJ4
serial: L2637JWG
size: 76GiB (81GB)
capabilities: partitioned partitioned:dos
configuration: ansiversion=5 signature=c1d9c1d9
*-volume:0
description: EXT3 volume
vendor: Linux
physical id: 1
bus info: scsi@0:0.0.0,1
logical name: /dev/sda1
logical name: /
logical name: /dev/.static/dev
version: 1.0
serial: a5716e71-cff2-4a12-be80-0ae76a3d2e49
size: 74GiB
capacity: 74GiB
capabilities: primary bootable journaled extended_attributes large_files huge_files recover ext3 ext2 initialized
configuration: created=2008-05-24 21:42:50 filesystem=ext3 modified=2008-07-22 23:43:51 mount.fstype=ext3 mount.options=rw,relatime,errors=remount-ro,data=ordered mounted=2008-07-22 10:59:08 state=mounted
*-volume:1
description: Extended partition
physical id: 2
bus info: scsi@0:0.0.0,2
logical name: /dev/sda2
size: 2204MiB
capacity: 2204MiB
capabilities: primary extended partitioned partitioned:extended
*-logicalvolume
description: Linux swap / Solaris partition
physical id: 5
logical name: /dev/sda5
capacity: 2204MiB
capabilities: nofs
*-cdrom:0
description: DVD reader
product: DVD-ROM GD-5000
vendor: HITACHI
physical id: 1
bus info: scsi@1:0.0.0
logical name: /dev/cdrom1
logical name: /dev/dvd1
logical name: /dev/scd0
logical name: /dev/sr0
version: 0213
capabilities: removable audio dvd
configuration: ansiversion=5 status=open
*-cdrom:1
description: CD-R/CD-RW writer
product: CD-RW CW4802
vendor: OPTORITE
physical id: 0.1.0
bus info: scsi@1:0.1.0
logical name: /dev/cdrom
logical name: /dev/scd1
logical name: /dev/sr1
version: 150E
serial: OPTORITECD-RW CW4802 150E0
capabilities: removable audio cd-r cd-rw
configuration: ansiversion=5 status=open
*-ide:1
description: IDE interface
product: 82801EB (ICH5) SATA Controller
vendor: Intel Corporation
physical id: 1f.2
bus info: pci@0000:00:1f.2
version: 02
width: 32 bits
clock: 66MHz
capabilities: ide bus_master
configuration: driver=ata_piix latency=0 module=ata_piix
*-serial UNCLAIMED
description: SMBus
product: 82801EB/ER (ICH5/ICH5R) SMBus Controller
vendor: Intel Corporation
physical id: 1f.3
bus info: pci@0000:00:1f.3
version: 02
width: 32 bits
clock: 33MHz
configuration: latency=0
*-multimedia
description: Multimedia audio controller
product: 82801EB/ER (ICH5/ICH5R) AC'97 Audio Controller
vendor: Intel Corporation
physical id: 1f.5
bus info: pci@0000:00:1f.5
version: 02
width: 32 bits
clock: 33MHz
capabilities: pm bus_master cap_list
configuration: driver=Intel ICH latency=0 module=snd_intel8x0

[NNNNNNNNNN1515]

Update:

I was thinking of ways to rule out whether the drive is just bad. I thought If I booted with a knoppix live cd, maybe it would detect the cd drive differently, and I could access my cdrw drive. Well, I cant mount the cd drive in knoppix either. It recognizes the drive there. In the k control center, it lists two cd rom drives, one capable of writing and rewriting cds. But in the shell, when I try to mount the cd-rw drive, it says "no medium found".

What do you all think? Could it be that my cd-rw drive is broken? I have another computer with a cdrw drive. I could switch out my current cd-rw drive for the other to see if ubuntu can get the other drive to work, but I don't want to open my computer up until I know for sure that there is no problem with the configuration or something simple like that. My spare computer is supposed to stay on all day to run my streaming audio server. What do you think? Is it time I open up my computer and put a new drive in, or is there anything else I can try to get my cds to mount?