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Windows 7: Which HDD to install Windows 7 on

22 Nov 2009   #1

Windows 7 Professional 64-bit
Which HDD to install Windows 7 on

I have two HDDs.

640GB WD Black Two-platter 32mb/cache
500GB Seagate 7200.12 Single-platter 16mb/cache

I've run HDTach and HDTune and this is what I've discovered. The Seagate beats the WD in Read/Write. The WD wins in access time and burst.

What is more important to a Windows 7 installation drive?


My System SpecsSystem Spec
22 Nov 2009   #2

Windows 7 Pro & Vista Home Premium

Truthfully, it's something you'll barely notice.

I'd choose the 640 WD.
My System SpecsSystem Spec
22 Nov 2009   #3

Windows 7 Ultimate x64

Access time is probably the most important for best performance across the board...given the other things that you mention.

I would put the OS on the WD the 640 caviar's are fast drives. But I honestly don't feel that you would see much difference between the two in real life use.
My System SpecsSystem Spec

22 Nov 2009   #4

XP Pro/Vista Ultimate (64)/Windows 7 Ultimate Signature Edition(64)

I usually install the OS to the smaller of two hard drives, or create a smaller partition. I do that solely because I can then fit an image of the main OS drive/partition onto the second.
As reghakr said, a diference of a few milliseconds won't be noticeable. If you had say a 128Gb SSD in your pile of HD's, that would definitely make a diference
My System SpecsSystem Spec
22 Nov 2009   #5

Windows 7 Professional 64-bit

Thanks guys. I already had it on the 640GB, but I wanted to see if I made the right choice. Later down the road when SSD drives mature and become a little more affordable/available, I will certainly go that route.
My System SpecsSystem Spec

 Which HDD to install Windows 7 on

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