Buying hard drives used to be simple. There was usually only one size and one speed. Now, you have to know a lot when purchasing your hard drives.

• The size of storage you need
• What serial interface it has
• How fast is the data transfer
• How fast is the rpm’s
• cache buffer

You also want to find out what kind of warranty your new hard drive comes with. You want it to have a good warranty in which the company will replace it for the full value not half off. You will also want to be able to receive the new one from the retail store instead of sending off for a new one, which can take a very long time. The price will be another thing to look at when choosing your hard drive. Usually the type of interface you chose will affect the price. The SCSI drives are the more expensive but they also are the faster technology of the drives. You can also expect to pay more the faster rpm’s it is.