Something wants the empty CD drive badly

[David Baron <d_baron@012.net.il>]

Keep getting requests for sectors on my second CD drive. Drive is empty and 
the call is returning tray open even though it is closed. The floppy as well. 
Here is the start of a slew of error messages (from logcheck):

Apr 12 11:33:40 d_baron kernel: floppy0: disk absent or changed during 
operation
Apr 12 11:33:40 d_baron kernel: end_request: I/O error, dev fd0, sector 0
Apr 12 11:33:40 d_baron kernel: Buffer I/O error on device fd0, logical block 
0
Apr 12 11:33:40 d_baron kernel: floppy0: disk absent or changed during 
operation
Apr 12 11:33:40 d_baron kernel: end_request: I/O error, dev fd0, sector 0
Apr 12 11:33:40 d_baron kernel: Buffer I/O error on device fd0, logical block 
0
Apr 12 11:33:41 d_baron kernel: hdd: tray open
Apr 12 11:33:41 d_baron kernel: end_request: I/O error, dev hdd, sector 0
Apr 12 11:33:41 d_baron kernel: Buffer I/O error on device hdd, logical block 
0
Apr 12 11:33:41 d_baron kernel: hdd: tray open
Apr 12 11:33:41 d_baron kernel: end_request: I/O error, dev hdd, sector 4
Apr 12 11:33:41 d_baron kernel: Buffer I/O error on device hdd, logical block 
1
Apr 12 11:33:41 d_baron kernel: hdd: tray open

I am not (to my limited knowledge), using autofs and anything like that. The 
first CD on /dev/hdb is not being so polled. This sequence of errors will 
sometimes cause DMA to be deactivated.

What gives?