This sounds like a bad disc. Or does it do it with every CD you try ?

Thanks for the quick reply.  It happens like this on every CD.  Also the only way
I can eject the cdrom is with eject /dev/sr0 as root.  I've never had issues with
my cdrom before or CDs.  

Hang on .. no sooner do I say that then I try another disc and this time it
automounts.  Not sure what to say or think.  

This is happening on other cds as well.  So this is a real bug. 

That whole area of scsi processing was restructured by:

commit 30b0c37b27485a9cb897bfe3824f6f517b8c80d6
[SCSI] implement scsi_data_buffer

I'm getting this with 2.6.27.21-170.2.56.fc10.i686.PAE...

I tried 3 dvds (2 movies, and one data cd burned on this machine when it was running F8), and I get:

Jun  3 20:16:01 g2 kernel: sr 4:0:0:0: [sr0] unaligned transfer
Jun  3 20:16:01 g2 kernel: __ratelimit: 30 callbacks suppressed
Jun  3 20:16:01 g2 kernel: Buffer I/O error on device sr0, logical block 32
Jun  3 20:16:01 g2 kernel: Buffer I/O error on device sr0, logical block 33
Jun  3 20:16:01 g2 kernel: Buffer I/O error on device sr0, logical block 34
Jun  3 20:16:01 g2 kernel: Buffer I/O error on device sr0, logical block 35
Jun  3 20:16:01 g2 kernel: Buffer I/O error on device sr0, logical block 36
Jun  3 20:16:01 g2 kernel: Buffer I/O error on device sr0, logical block 37
Jun  3 20:16:01 g2 kernel: Buffer I/O error on device sr0, logical block 38
Jun  3 20:16:01 g2 kernel: Buffer I/O error on device sr0, logical block 39
Jun  3 20:16:01 g2 kernel: Buffer I/O error on device sr0, logical block 40
Jun  3 20:16:01 g2 kernel: Buffer I/O error on device sr0, logical block 41
Jun  3 20:16:01 g2 kernel: sr 4:0:0:0: [sr0] unaligned transfer
Jun  3 20:16:01 g2 kernel: sr 4:0:0:0: [sr0] unaligned transfer

All 3 dvd's mount/play on my MacBook (OS X).


Then I tried an store-bought audio CD, and got the above plus:

Jun  3 20:18:46 g2 kernel: sr 4:0:0:0: [sr0] unaligned transfer
Jun  3 20:18:51 g2 kernel: ata5.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen
Jun  3 20:18:51 g2 kernel: ata5.00: cmd a0/00:00:00:00:00/00:00:00:00:00/a0 tag 0
Jun  3 20:18:51 g2 kernel:         cdb be 04 00 00 29 84 00 00  01 78 00 00 00 00 00 00
Jun  3 20:18:51 g2 kernel:         res 58/00:02:00:30:09/00:00:00:00:00/a0 Emask 0x2 (HSM violation)
Jun  3 20:18:51 g2 kernel: ata5.00: status: { DRDY DRQ }
Jun  3 20:18:51 g2 kernel: ata5: soft resetting link
Jun  3 20:18:51 g2 kernel: ata5.00: configured for UDMA/33
Jun  3 20:18:51 g2 kernel: ata5: EH complete
Jun  3 20:18:51 g2 kernel: ata5.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen
Jun  3 20:18:51 g2 kernel: ata5.00: cmd a0/00:00:00:00:00/00:00:00:00:00/a0 tag 0
Jun  3 20:18:51 g2 kernel:         cdb be 04 00 00 72 13 00 00  01 78 00 00 00 00 00 00
Jun  3 20:18:51 g2 kernel:         res 58/00:02:00:30:09/00:00:00:00:00/a0 Emask 0x2 (HSM violation)
Jun  3 20:18:51 g2 kernel: ata5.00: status: { DRDY DRQ }
Jun  3 20:18:51 g2 kernel: ata5: soft resetting link
Jun  3 20:18:51 g2 kernel: ata5.00: configured for UDMA/33

argghh... so as I was shutting down applications to log out and reboot to test this after a reboot, i noticed that my F10 VirtualBox VM had thrown up an error about not being able to read /dev/sr0. So I shut-down the VM, and retried one of the movies. Mounted just fine. Sorry for the noise...

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