[sr0] unaligned transfer

[twalter]

I'm experiencing some log spam regarding my BDROM. There is no disc in the drive yet it complains about an unaligned transfer. Is this some sort of host-bus error?

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[    2.096639] sr 4:0:0:0: [sr0] scsi3-mmc drive: 48x/48x writer dvd-ram cd/rw xa/form2 cdda tray
[    2.096767] sr 4:0:0:0: Attached scsi CD-ROM sr0
[ 3692.236179] sr 4:0:0:0: [sr0] tag#22 UNKNOWN(0x2003) Result: hostbyte=0x00 driverbyte=0x08
[ 3692.236181] sr 4:0:0:0: [sr0] tag#22 Sense Key : 0x2 [current]
[ 3692.236182] sr 4:0:0:0: [sr0] tag#22 ASC=0x3a ASCQ=0x1
[ 3692.236184] sr 4:0:0:0: [sr0] tag#22 CDB: opcode=0x28 28 00 00 00 00 00 00 00 08 00
[ 3692.236185] print_req_error: I/O error, dev sr0, sector 0
[ 3692.236241] sr 4:0:0:0: [sr0] unaligned transfer
[ 3692.236269] sr 4:0:0:0: [sr0] unaligned transfer
[ 3692.236276] sr 4:0:0:0: [sr0] unaligned transfer
[ 3692.236282] sr 4:0:0:0: [sr0] unaligned transfer
[ 3692.236288] sr 4:0:0:0: [sr0] unaligned transfer
[ 3692.236293] sr 4:0:0:0: [sr0] unaligned transfer
[ 3692.236299] sr 4:0:0:0: [sr0] unaligned transfer
[ 3692.236304] sr 4:0:0:0: [sr0] unaligned transfer
[24348.969732] sr 4:0:0:0: [sr0] tag#30 UNKNOWN(0x2003) Result: hostbyte=0x00 driverbyte=0x08
[24348.969734] sr 4:0:0:0: [sr0] tag#30 Sense Key : 0x2 [current]
[24348.969735] sr 4:0:0:0: [sr0] tag#30 ASC=0x3a ASCQ=0x1
[24348.969737] sr 4:0:0:0: [sr0] tag#30 CDB: opcode=0x28 28 00 00 00 00 00 00 00 08 00

Drive info:

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CD location   : /dev/cdrom
CD driver name: GNU/Linux
   access mode: IOCTL

Vendor                      : HL-DT-ST
Model                       : BD-RE  BH16NS40
Revision                    : 1.03
Hardware                                  : CD-ROM or DVD
Can eject                                 : Yes
Can close tray                            : Yes
Can disable manual eject                  : Yes
Can select juke-box disc                  : No

Can set drive speed                       : No
Can read multiple sessions (e.g. PhotoCD) : Yes
Can hard reset device                     : Yes

Reading....
  Can read Mode 2 Form 1                  : Yes
  Can read Mode 2 Form 2                  : Yes
  Can read (S)VCD (i.e. Mode 2 Form 1/2)  : Yes
  Can read C2 Errors                      : Yes
  Can read IRSC                           : Yes
  Can read Media Channel Number (or UPC)  : Yes
  Can play audio                          : Yes
  Can read CD-DA                          : Yes
  Can read CD-R                           : Yes
  Can read CD-RW                          : Yes
  Can read DVD-ROM                        : Yes

Writing....
  Can write CD-RW                         : Yes
  Can write DVD-R                         : Yes
  Can write DVD-RAM                       : Yes
  Can write DVD-RW                        : No
  Can write DVD+RW                        : No
__________________________________

[Moderator edit: Moved poster's self-response into main post, then deleted that self-response to return the thread to the unanswered list.

OP: Generally, if post length permits, you should edit extra information into your first post instead of replying to it. Some users run a canned search for threads with zero replies as a way of finding posts to answer. When you replied to yourself, you removed your thread from that list, even though you were not replying to announce that the thread was solved. Thus, they would no longer see your thread on the list of unanswered threads.
-Hu]

[blopsalot]

I would bet the drive is defective before the controller, but yeah, one or the other. Much less likely is a kernel issue.

[twalter]

The drive functions correctly, despite the log spam, under Windows and Linux. It just doesn't seem to like the responses to the INQ.