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Why won't my laptop Hard Drive fit inside my Hard Disk Caddy?

If you've removed your Hard Disk Drive (HDD) from you laptop to recover some data or to reuse the Hard Disk Drive to create your own portable storage solution then beware if you have a HDD that is 12mm thick. The thickness of the HDD is important when chosing any external HDD case or HDD enclosure because the HDD cases are designed to provide a "snug fit" around the HDD to stop them rattling around inside the HDD Case.

The vast majority of laptop Hard Drives are 9.5mm thick. As a consequence most Laptop HDD cases are designed to accomodate 9.5mm Hard Disk Drives. If you have a HDD that is 12mm thick then please ensure you double check the specification of the HDD caddy before you buy because if you do buy a HDD case designed for a 9.5mm HDD then you simply won;t be able to slide the HDD inside the Caddy. The connections will fit on the HDD but the HDD itself will not slide into the body of the caddy.

Conversley if you have a 9.5mm Hard Disk Drive be careful to select a HDD enclosure that is designed (as most of them are) for a standard 9.5mm HDD. if you do buy a 12mm HDD caddy then whilst your 9.5mm HDD will fit inside the case it will not be held in place tightly and over time this will create pressure on the IDE connectors and could ultimately damage the HDD interface leading to the failure of the HDD.

If you're not sure which Laptop Hard Disk Drive you have but need a solution to recover the data then you could consider a cable solution. The benefit of these is that they fit any HDD irrespective of whether they are laptop 2.5" or destop 3.5" and irrespective of whether they are IDE or SATA and it make no difference how thick the HDD is.

Still not sure then check out the options and at USBNow - always happy to help and advise

About the Author

Phil is part of the team at USBNow. Launched in 2002 USBNow is a company that is committed to answers to people USB problems be this advice, support or products. Check us out at http://www.usbnow.co.uk

Can external 2.5" caddy do everything internal drive can do?

I want to do some drive testing/data recovery on 2.5" internal drives. I could put them in a computer and take them out again but it's kind of tedious. Can an external drive bay do everything it could do internally? I've heard that SMART doesn't work over USB, for instance. Is this true? Can I do low-level scans over USB?

NO, buy a external harddisk enclosure that has both eSATA and USB port on it, for a reliable professional solution.

Using an USB bus interface is not a reliable option in your case and may mostly and unfortunately result in system slowdown, irresponsiveness, freeze due to several hardware/software architecture related factors.

If you don't have an eSATA port on your notebook then you should also buy a eSATA Express or PCMCIA Adapter Card.

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