Umm - what do you mean by "disk drive"? Because to me that means a hard drive, the same as HDD...!
If you genuinally do need two hard drives on the same IDE cable, then yes you can - either set the jumpers to cable select or set them to master and slave respectively, then put the master at the end of the ribbon cable and the slave in the middle. (You do have to worry about jumpers for the old PATA drives, even if it's just ensuring that they're set correctly.)