Manufacturing method for assembling storage drives

A manufacturing method for assembling storage drives comprising:

• engaging a first part of a two part enclosure with a reference datum plane on a first hard drive, the first part being one of a first plurality of enclosure parts, and the first hard drive being one of a first plurality of hard drives;
• connecting a second part of the two part enclosure to the first part to form a first enclosure, the first hard drive being positioned within the first enclosure, and the second part being one of a second plurality of enclosure parts;
• engaging a third part of a second enclosure with a reference datum plane on a second hard drive, the third part being one of the first plurality of enclosure parts, and the second hard drive being one of a second plurality of hard drives having a different thickness than the first plurality of hard drives;
• connecting a fourth part to the third part to form the second enclosure, the second hard drive being positioned within the second enclosure, and the fourth part being one of a third plurality of enclosure parts,
• wherein each hard drive of the first and second pluralities of hard drives having a reference datum plane from which an electrical connector and mounting holes are measured, the distances being the same for the first and second pluralities of hard drives;
• and
• engaging the first part of the two part enclosure with the reference datum plane on the first hard drive and engaging the third part of the second enclosure with the reference datum plane on the second hard drive both further comprising:
• engaging the respective first and third parts with the reference datum planes on the first and second hard drives such that the electrical connectors and mounting holes on the respective first and second hard drives are in the same relative positions with respect to the first and third parts.