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Old 2011-07-25, 09:23 AM   #1
Wayne
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Default Why are SSDs so big?

I guess it makes sense to standardize to a few sizes but why are SSDs made in a 2.5" form factor? Why not make them much smaller - essentially just large enough for a SATA connector and a power connector? This would make it easier to make more compact laptops and to make very tiny HTPCs in a mini-ITX form factor. I know that there are some custom form factors and there is a Mini PCI-Express version but why not have the most commonly sold versions be a smaller size?
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Old 2011-07-25, 09:29 AM   #2
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The reason is to make them compatible with existing systems. SSD on board on some latops are very small (looney/twoney) size. Some onboard SSD don't have a typical SATA connector. They can be connected via ribbon cable or using PCIe ports on the motherboard.
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Old 2011-07-25, 12:11 PM   #3
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Wayne, some laptops already do this - with SSDs that look more like a stick of memory than a 2.5" HDD.
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Old 2011-07-25, 12:14 PM   #4
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IIRC, some use 1.5" SSDs.
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Old 2011-07-25, 03:54 PM   #5
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A great example would be the Macbook Air.
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Old 2011-07-25, 04:11 PM   #6
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mSATA are what you guys are thinking of - they essentially made a new SATA connector to fit these tiny SSDs
(some are PCIe direct connect, but rarer)

As for the OP, it's simply for standards.
Many laptops are slide-in vs top-mount when putting in a drive
If you make it just the length needed, and width of a SATA-interface, good luck getting that one in and out
(for a desktop, no problem provided you go to the first standard screw hole spot, so you can actually fit i in a standard case properly)
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Old 2011-07-25, 10:59 PM   #7
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Thanks folks - it looks like there are two smaller form factors:
2.5" half SATA and mSATA

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