Buffer I/O error on device sr0

[Allen Kistler]

I used to think that the subject error in /var/log/messages dealt with
sr_mod not being loaded by udev in initrd.  Maybe it still is, but I
notice that sr_mod is getting loaded by something now, because /dev/scd0
exists automatically.  But I still get this error (see sample below).

Possibly related is the fact that CD audio utilities can't seem to deal
(completely) with audio CDs in my SCSI CD drive.  ("It worked in FC2.")
 Data CDs appear to have no problems, but I haven't really tested
thoroughly.

Any ideas?

kernel: Buffer I/O error on device sr0, logical block 0
kernel: Buffer I/O error on device sr0, logical block 1
kernel: Buffer I/O error on device sr0, logical block 2
kernel: Buffer I/O error on device sr0, logical block 3
kernel: Buffer I/O error on device sr0, logical block 4
kernel: Buffer I/O error on device sr0, logical block 5
kernel: Buffer I/O error on device sr0, logical block 6
kernel: Buffer I/O error on device sr0, logical block 7
kernel: Buffer I/O error on device sr0, logical block 8
kernel: Buffer I/O error on device sr0, logical block 9
kernel: Buffer I/O error on device sr0, logical block 10
kernel: Buffer I/O error on device sr0, logical block 11
kernel: Buffer I/O error on device sr0, logical block 12
kernel: Buffer I/O error on device sr0, logical block 13
kernel: Buffer I/O error on device sr0, logical block 14
kernel: Buffer I/O error on device sr0, logical block 15
kernel: end_request: I/O error, dev sr0, sector 0
kernel: Buffer I/O error on device sr0, logical block 0
kernel: end_request: I/O error, dev sr0, sector 512
kernel: Buffer I/O error on device sr0, logical block 64
kernel: Buffer I/O error on device sr0, logical block 65
kernel: Buffer I/O error on device sr0, logical block 66
kernel: Buffer I/O error on device sr0, logical block 67
kernel: Buffer I/O error on device sr0, logical block 68
kernel: Buffer I/O error on device sr0, logical block 69
kernel: Buffer I/O error on device sr0, logical block 70
kernel: Buffer I/O error on device sr0, logical block 71
kernel: end_request: I/O error, dev sr0, sector 512
kernel: Buffer I/O error on device sr0, logical block 64