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Comparison ONE SSD Vs 2x 10K Raptor Drives in Raid 0 - Page 5

post #41 of 47
guaranteed get a raid controller. google it. when you get hardware raid it has special buffers,cache,processors to do the work for you
without putting stress on the os or your cpu. when you use hardware the os doesnt even know its there and runs a lot faster.
i know i already told you,but maybe someone else would like to know:)
i would google benches from the two. maybe i will. ill update you! smile.gif
candy pain
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candy pain
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post #42 of 47
guaranteed get a raid controller. google it. when you get hardware raid it has special buffers,cache,processors to do the work for you
without putting stress on the os or your cpu. when you use hardware the os doesnt even know its there and runs a lot faster.
i know i already told you,but maybe someone else would like to know:)
i would google benches from the two. maybe i will. ill update you! smile.gif
candy pain
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candy pain
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post #43 of 47
Thread Starter 
Yeah I checked last night to see if my dad had a raid controller some where in his boxes of old stuff and all I found was a raid controller for external drives. =/ O well. Also, if I were to set the stripe size the 16k it would make the raptors raid run faster? And where is this setting at? When setting up the raid I think where I put 128k for Raid0?
post #44 of 47
Quote:
Originally Posted by esCob4r View Post

Yeah I checked last night to see if my dad had a raid controller some where in his boxes of old stuff and all I found was a raid controller for external drives. =/ O well. Also, if I were to set the stripe size the 16k it would make the raptors raid run faster? And where is this setting at? When setting up the raid I think where I put 128k for Raid0?

Yes you set it to 16k when you form the raid array (setting up), as far as making it faster, I don't know.

Did you install the latest Intel raid drivers ?

 

 

 

 

http://downloadcenter.intel.com/Detail_Desc.aspx?agr=Y&ProdId=2101&DwnldID=20624&ProductFamily=Software+Products&ProductLine=Chipset+Software&ProductProduct=Intel%C2%AE+Rapid+Storage+Technology&lang=eng


Edited by quakermaas - 5/12/12 at 11:33am
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post #45 of 47
Quote:
Originally Posted by esCob4r View Post

Yeah I checked last night to see if my dad had a raid controller some where in his boxes of old stuff and all I found was a raid controller for external drives. =/ O well. Also, if I were to set the stripe size the 16k it would make the raptors raid run faster? And where is this setting at? When setting up the raid I think where I put 128k for Raid0?
Way too high.
Quote:
Originally Posted by quakermaas View Post

Yes you set it to 16k when you form the raid array (setting up), as far as making it faster, I don't know.

I had a 74GB Raptor. Same generation as yours. I noticed odd results in HDTune - with the block size set too high (ex: 64KB+) it would read at 45-50MB/sec. Set lower it would read at about 80MB/sec; it seemed to be optimized for smaller read sizes. Since you're getting about double 45-50MB/sec with two, your stripe size must be set too high for the drives. It's the only thing that makes sense.
     
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post #46 of 47
Thread Starter 
Thanks for the input. Yeah for some reason my entire system failed on the raids so I am thinking I either messed it up or one of the drives was failing. Just decided to wait till i get an SSD and boot off of that.
post #47 of 47
Oh come on guys, I thought the answer was obvious. Only like two people in this thread got it, I expected much better from OCN.

To the OP: the main reason that your raptors are slow is the fact that they hold very little data. The platter density is too low.

Two things affects sequential speed.
1. How fast can the disk spin
2. How much data can the disk hold with one revolution

With sequential data, data is stored along the disk platter in circles. 100MB of data may take an entire revolution on a 36GB disk (depending on how close the data to the center of the circle is), but the same 100MB of data may only take a quarter of a revolution or even less on a 500GB disk.

Your 10k raptors may spin faster than 7.2k drives, but the data is too spread out due to low disk density. It may has to spin two or three or many full circles to get the data you need. On a drive with much higher density, it doesn't even have to spin one full circle.
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