$ dmesg | grep sr[0-9]
[ 4.654508] sr0: scsi3-mmc drive: 48x/48x writer dvd-ram cd/rw xa/form2 cdda tray
[ 4.654571] sr 1:0:0:0: Attached scsi CD-ROM sr0
[ 134.372294] end_request: I/O error, dev sr0, sector 0
[ 134.372301] Buffer I/O error on device sr0, logical block 0
[ 134.375029] end_request: I/O error, dev sr0, sector 0
[ 134.375033] Buffer I/O error on device sr0, logical block 0
[ 443.812528] end_request: I/O error, dev sr0, sector 0
[ 443.812535] Buffer I/O error on device sr0, logical block 0
[ 443.815274] end_request: I/O error, dev sr0, sector 0
[ 443.815277] Buffer I/O error on device sr0, logical block 0
[ 445.113560] end_request: I/O error, dev sr0, sector 64
[ 445.125205] end_request: I/O error, dev sr0, sector 1024
[ 445.127984] end_request: I/O error, dev sr0, sector 2048
[ 445.141252] end_request: I/O error, dev sr0, sector 64
[ 445.141264] isofs_fill_super: bread failed, dev=sr0, iso_blknum=16, block=16
[ 552.241293] end_request: I/O error, dev sr0, sector 0
[ 552.241300] Buffer I/O error on device sr0, logical block 0
[ 552.245599] end_request: I/O error, dev sr0, sector 0
[ 552.245603] Buffer I/O error on device sr0, logical block 0
[ 553.375144] end_request: I/O error, dev sr0, sector 64
[ 553.386985] end_request: I/O error, dev sr0, sector 1024
[ 553.389886] end_request: I/O error, dev sr0, sector 2048
[ 553.403097] end_request: I/O error, dev sr0, sector 64
[ 553.403109] isofs_fill_super: bread failed, dev=sr0, iso_blknum=16, block=16
[ 626.471224] end_request: I/O error, dev sr0, sector 0
[ 626.471230] Buffer I/O error on device sr0, logical block 0
[ 626.475517] end_request: I/O error, dev sr0, sector 0
[ 626.475521] Buffer I/O error on device sr0, logical block 0
[ 628.284903] end_request: I/O error, dev sr0, sector 64
[ 628.296682] end_request: I/O error, dev sr0, sector 1024
[ 628.299599] end_request: I/O error, dev sr0, sector 2048
[ 628.312692] end_request: I/O error, dev sr0, sector 64
[ 628.312704] isofs_fill_super: bread failed, dev=sr0, iso_blknum=16, block=16
[ 1305.358923] end_request: I/O error, dev sr0, sector 0
[ 1305.358929] Buffer I/O error on device sr0, logical block 0
[ 1305.363238] end_request: I/O error, dev sr0, sector 0
[ 1305.363243] Buffer I/O error on device sr0, logical block 0
[ 1307.179579] end_request: I/O error, dev sr0, sector 64
[ 1307.191143] end_request: I/O error, dev sr0, sector 1024
[ 1307.193903] end_request: I/O error, dev sr0, sector 2048
[ 1307.207167] end_request: I/O error, dev sr0, sector 64
[ 1307.207179] isofs_fill_super: bread failed, dev=sr0, iso_blknum=16, block=16
$ ls -l /dev/dvd* /dev/scd* /dev/cd* /dev/sr*
lrwxrwxrwx 1 root root 3 2009-12-01 18:56 /dev/cdrom1 -> sr0
lrwxrwxrwx 1 root root 3 2009-12-01 18:56 /dev/cdrw1 -> sr0
lrwxrwxrwx 1 root root 3 2009-12-01 18:56 /dev/dvd1 -> sr0
lrwxrwxrwx 1 root root 3 2009-12-01 18:56 /dev/dvdrw1 -> sr0
lrwxrwxrwx 1 root root 3 2009-12-01 18:56 /dev/scd0 -> sr0
brw-rw----+ 1 root cdrom 11, 0 2009-12-01 18:56 /dev/sr0
$ cat /etc/fstab
# /etc/fstab: static file system information.
#
# Use 'vol_id --uuid' to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point> <type> <options> <dump> <pass>
proc /proc proc defaults 0 0
# / was on /dev/sda1 during installation
UUID=907c0e22-c9d3-4ea1-b78d-2683070a82ba / ext3 relatime,errors=remount-ro 0 1
# swap was on /dev/sda5 during installation
UUID=6121b9c6-9c65-404e-9ab0-9b0d3823390d none swap sw 0 0
/dev/scd0 /media/cdrom0 udf,iso9660 user,noauto,exec,utf8 0 0
/dev/fd0 /media/floppy0 auto rw,user,noauto,exec,utf8 0 0