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5400rpm vs 7200rpm in Raid5

post #1 of 12
Thread Starter 
picked up three wd caviar green 2tb drives last week and failed to realize they were 5400rpm drives.

return the drives and get a 7200rpm drive?
post #2 of 12
Quote:
Originally Posted by ehaze;12009595 
return the drives and get a 7200rpm drive?

Yes
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post #3 of 12
You'd see a nice performance gain. Do it.
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post #4 of 12
Thread Starter 
196217268_1703431390_AMC-MP-Starsky-Hutch-BenOwen.jpg

well, guess i'm headed back to frys.
post #5 of 12
If your using it just for storage, keep them, if the main drive, then you need WD blacks (blue is OK) for best speed.

BTW, Greens are variable speed drives (between 5400 and 7200 depending on use).
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post #6 of 12
If these are for storage only.... then get the cheapest per GB.
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post #7 of 12
Thread Starter 
storage and have VMs that live on the raid.
and Steam installs sit on the raid.
Edited by ehaze - 1/14/11 at 12:41pm
post #8 of 12
Quote:
Originally Posted by blupupher;12010079 
BTW, Greens are variable speed drives (between 5400 and 7200 depending on use).

No - they run at 5400rpm all the time. As do the Samsung EcoGreen drives. The Seagate low power drives run at 5900rpm. There are no variable speed drives on the market, although they are in development (although whether they will ever see market is another matter - the technology is going to be tricky to get cheap and reliable).
Quote:
Originally Posted by ehaze;12010821 
storage and have VMs that live on the raid.
and Steam installs sit on the raid.

For VMs and gaming you would probably be better with non-Green drives. And don't use RAID5 either - it's crap for small writes, so OS performance is terrible.

Oh, and Green drives don't work well on (some) hardware RAID controllers too.
post #9 of 12
Quote:
Originally Posted by the_beast;12011924 
No - they run at 5400rpm all the time. As do the Samsung EcoGreen drives. The Seagate low power drives run at 5900rpm. There are no variable speed drives on the market, although they are in development (although whether they will ever see market is another matter - the technology is going to be tricky to get cheap and reliable).

...

Just going by everything I have read online.
Some say variable, some say 5400 only, some say 5900, some say 5400-7200 depending on which model you have.
WD themselves will not say.

Still, greens are designed to be a storage drive, not a primary.
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post #10 of 12
Quote:
Originally Posted by the_beast;12011924 
No - they run at 5400rpm all the time. As do the Samsung EcoGreen drives. The Seagate low power drives run at 5900rpm. There are no variable speed drives on the market, although they are in development (although whether they will ever see market is another matter - the technology is going to be tricky to get cheap and reliable).

Bang on. "Intellipower" is a great marketing trick used (read: exploited) by Western Digital to make their drives look more than what they actually are.

I suspect they toyed with the idea of varying the speeds across different models according to platter density (so for example, 375GB platters might spin at 6200RPM, while 500GB platters would spin at 5400, thereby delivering similar performance), but shelved that idea and decided to keep "Intellipower" combined with a clever marketing scheme.

To my mind, truly variable speed drives aren't worth the engineering hassle. Combining variable speed rotation, increasing platter density and more accurate servo control just isn't worth the cost of development. It would be better to work towards making solid state media cheaper and denser. The power saving over rotational media is inherently large.
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