Hi DaveK456,
I would like to inform you that you can add the new harddrive in any Sata port and it should work fine.
It would be advisable you let the DVD and harddrive be connected and add the additional hard-drive on the Sata port 2.
If you have any further queries, please feel free to contact us.
Thanks and Regards
Sandeep P
#iworkfordell
