How to Fit an 2,5" PATA HDD in 3,5" HDD Case

Yesterday I got a computer that had a broken HDD. I had a 2.5 "HDD, so I decided to install it in computer, but it's too small, so i put it in 3,5" HDD case as follows:

Required items:
-broken HDD (3,5")
-workable HDD (2,5")
-2,5" to 3,5" PATA HDD adapter (
-a smal saw

WARNING, do not squeeze, bang or shock HDD, otherwise you will break it!

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Step 1: Disassembling HDD

To disassemble the HDD you need to unscrew the top screws and remove the top cover.
The steps are shown in Figures.

Step 2: Cutting a Piece of Case for Connectors

To connect the drive we need the connectors, so we have to cut a piece of the case:

Step 3: Cutting the Thread

To make sure that the connector does not move, we have drilled two holes and tighten it:

Step 4: Done!

When you made the previous steps, your hdd sould look just like one on the picture, then just put back the cover and screw back the screws.

Step 5: Try It!

to try it, just connect the HDD on computer!

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    3 Discussions


    7 years ago on Introduction

    You can get adapter mounting rails to do it properly since you did not shock mount it in the case. The old harddrive case would trap in the heat and eventually put excessive strain on your drive unless you ventilate it at least with holes..

    2 replies

    Reply 7 years ago on Introduction

    yeppers... the old hard drive acts as a giant heat sink!
    More evidence is given by the VelociRaptor hard drives.
    google image search for WD VelociRaptor.

    also, since it's hard-mounted to the old drive... any shock mounting form the external case is re-used... so no additional absorption is called for.