RAID 0: Hard-Drive Size and Cache Size

Hey guys,

N00bie here – I'm looking at setting up a RAID 0 for my new computer build (I will back-up the snot out of it, no worries) but I'm stuck between two WD hard-drives with a $10 price difference ($20 total). I know it's not a lot but now that I got my build together I'm just seeing where I can cut back little by little, it's been adding up to a decent amount so far.

Anyways, the one drive is 3.5" at 7200rpm with 64MB of cache. The other is 2.5" at 7200rpm with 16MB of cache (the cheaper one, surprisingly). What, if any, performance differences will I notice with regard to the platter sizes and the cache sizes? After more than thirty-minutes of digging I only found one off-handed comment on the topic (maybe I need some new vocab. on this stuff) and would like some more info before I dive in.


EDIT: I already have a 512GB SSD I'm throwing in as my primary boot/app drive. The RAID will be all done in software with WD Blacks. Any other RAID hints/tips I should be aware of?
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  1. Best answer
    If the difference is only 20 bucks total, definitely go with the 64mb disk. The 2.5 inch disk is more than likely aimed at the laptop crowd. If you're going with a conventional HDD over SSD, then I'd say go with a 3.5" disk. The disk with 64mb of ram will give you a performance advantage. And if you're setting up RAID 0, you care about performance.
  2. Why not a WD black edition no raid with longer warrantee get one with 5 years
    (Fastest WD model) or hybrid SSD / Hdd model
    Lot safer than raid 0

    If a very small case then 2.5" drives have smaller thermal load so may have advantage

    There is also a WD 10,000rpm 2.5" drive in a heat sink that make it a 3.5" drive

    Personally I think I will use a hybrid drive on my next build
    Currently I have a 120GB SSD +. 1 TB hard disk

    PS. If you must have raid 0 have a big fan blow cooling air over them

    Mike Barnes
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