If you'd like to replace a harddrive, how do you know the new harddrive will be the same size w/ the old one

Question

Given that you need to put it where the old harddrive is at.

I don't need to do it. I just don't have the answer for myself.

Thank you.

Answer 1

Internal harddrives use the IBM AT computer standard that explains the exact outer size of the harddrive, the screw hole locations, size of the screw holes, and the type of threading the screw holes use.

Because of this standard, you now only have to worry about the type of connector (IDE[aka ATA, PATA], SCSI, or SATA), and the logical size of the drive (measured in megabytes, gigabytes, and soon terabytes).

Answer 2

As far as i know, All hard drives are a standard size, with screw placements at relatively the same place.