Bad sounds when trying to read

i have a sohw 1673
its kept in vertical position, is this a problem for the drive?
when i put in dvd…it makes quite a racket with sound like springs twanging, knocking around, crackling
sometimes the dvd is read/write fine, other times nothing happens and i have to reinsert it and hope it works
once the disc is detected and the listing comes, it runs fine, but the detecting takes quite a while with the sounds