Cdrom drive access question

[Dean]

I was wondering if anyone has experienced issues with cdrom drives that 
check for a cd every minute or so. Whenever this happens, the screen 
freezes temporarily and then comes back.  The thing is, though that only 
the scsi cd-writer (yamaha 4x on a adaptec 2940AU) is having the 
problem, while the cdrom on the ide channel does not do this. Is there 
any way to disable this? please point me to a man page or something... 
just typing drives me nutz.

thanks,
dean