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5400rpm vs 7200rpm in Raid5 - Page 2

post #11 of 12
Quote:
Originally Posted by blupupher;12012289 
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.

It would appear a lot of what you read was wrong - WD's initial marketing seemed to imply that the drives had variable rpm, and as a result many retailers put this info on their sites and you can see it mentioned a lot in forums also. WD then changed their info to state that the rpm was fixed, but could be any value from 5400-7200 rpm (although the pages on their site that said this no longer exist either, but you can see them on Google's cache or achive.org). Whilst WD maintain the drives rpm could be anything from 5400-7200 rpm, I have never seen (nor seen any article where anyone else has confirmed) one that actually operates at anything other than 5400 rpm. Again this is WD being less than honest - at least Samsung and Seagate publish the spindle speeds of there low power drives.

If you want you can measure the spindle speed of your drive yourself - all you need is a microphone and sound card. Record the sound of the drive, then analyse the frequency response of the recording. A Green drive will show a peak in the spectrum at 90Hz, corresponding to 5400 rpm (90 revs per second * 60 seconds = 5400 revs per minute). A 7200 rpm drive has a peak at 120Hz, and a 5900 rpm drive will show one at 98Hz.
post #12 of 12
Quote:
Originally Posted by the_beast View Post
If you want you can measure the spindle speed of your drive yourself - all you need is a microphone and sound card. Record the sound of the drive, then analyse the frequency response of the recording. A Green drive will show a peak in the spectrum at 90Hz, corresponding to 5400 rpm (90 revs per second * 60 seconds = 5400 revs per minute). A 7200 rpm drive has a peak at 120Hz, and a 5900 rpm drive will show one at 98Hz.
Yea, I found a site that had done that, and they were 5400 RPM.
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Samsung  Samsung DVD-RW  Samsung DVD-RW  Cooler Master Hyper 212+ 
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