These questions can really help you find the correct drives you need
Your service tag can provide a lot of useful information that will help us determine the drive you need.
Server Model number
Providing this information is essential, especially when you do not have the service available, as this will determine the trays you will use.
2.5" vs 3.5" Bay
It is important to know that size bays your server or storage array has. Often times 3.5" bays can utilize 2.5" drives with the help of a converter.