A “slim” internal laptop hard drive

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I am looking to purchase a second internal 1TB hard drive for my Alienware 17 laptop. There is an empty bay for a secondary drive but I am uncertain whether I can buy a regular internal drive or a slim internal hard drive. What are the slim drives for?

The reason I am slightly concerned about the size is that I took apart my old raptor drive which is really a 2.5 hard drive inside a full size "heat sink" enclosure and it didn't fit in the Alienware. The SATA connector was in the correct spot but the hard drive itself was too thick.

Will a regular internal hard drive fit or do i need a "slim" one.

Best Answer

2,5" HDDs come in different form factors, usually 15mm (for servers), 9.5mm (most usual form factor, most applications), or 7mm (usually for ultrabooks etc.), where 7mm seems to get more and more common. "SLIM" most probably means 7mm height.