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2 or 3 Drives?

post #1 of 12
Thread Starter 
I am about to buy a new bunch of drives for my rig.

I have decided on either 2 or 3 of the WD6401AALS.

These have a 32 meg cache, are apparently really fast (90 - 100mb/s read) and are 640 gig.


Question is, do I get two of 3 of these drives to run in RAID 0.

I currently have two WD5000AAKS which pull about 120 between the two of them.

I may get a dedicated RAID controller in the future but for now I will be using onboard.

So heres the question:

How much faster will a 3 drive RAID 0 be than a 2 drive RAID 0?

Cheers
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post #2 of 12
You cannot run a 3 drive RAID 0. You have to have and even number. On the other hand with 3 you can run a RAID 5, which has redundancy.
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post #3 of 12
Thread Starter 
Quote:
Originally Posted by EmerilLIVE View Post
You cannot run a 3 drive RAID 0. You have to have and even number. On the other hand with 3 you can run a RAID 5, which has redundancy.
Thanks for that info......

But I beleive you are incorrect.


I will be keeping backup images of the install weekly on a copuple of other drives.
Edited by The_Rocker - 12/12/08 at 8:31am
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post #4 of 12
I recommend two drives running in raid, and a third as backup, just in case the raid setup fries both your drives.
 
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post #5 of 12
Thread Starter 
OMG Why can't people read!

I have been running two drives in RAID 0 for nearly 2 damn years! I know and don't care about the risk! I JUST WANT SPEED!!!!

I create images of my system install and keep em of another disk anyway!
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post #6 of 12
i reccomend...extra...drive...backup...lol

seriously though. i know the minumin is 2 drives. also its say 2 or more drives for raid 0. if it would would i would think you might see a third% increase.
post #7 of 12
Quote:
Originally Posted by The_Rocker View Post
Thanks for that info......

But I beleive you are incorrect.


I will be keeping backup images of the install weekly on a copuple of other drives.
LOL, yes. I type to fast, RAID 1 requires even #'s, RAID 0 is good for 2+ drives.

http://www.ocforums.com/showthread.php?t=482610

Quote:
My older Raid 0 Matrix benchmarks had my 2 X Raptor 150's HDTached at:
175.5 Sustained Read and 6.2ms access time.

My newer Raid 0 Matrix benchmarks of 3 X Raptor 150's are HDTached at:
260 Sustained Read and 6.3ms access time.
I'd expect similar % gains(about 48%) in read performance, access times will actually decrease. Seems a near 100% increase with RAID 0 over a single drive, about 50% increase with a third, wonder if the trend continues with a 4th, as in 25% gain over 3 drives?
Edited by EmerilLIVE - 12/12/08 at 9:02am
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post #8 of 12
Thread Starter 
So, 2 or 3 drives then folks?
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post #9 of 12
i would go with three, .1ms isnt much of a slowdown =P
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post #10 of 12
3 drives is better than 2...

faster performance and more space...

just increases risk by a small margin due to the extra drive...but who really cares.

I suggest up to 4 drives on onboard raid controllers...after that you need to go with the card.

I have my WD's in raid 0 and I'm moving to an upgrade cause I need more space...going with 3 640's just like you.

with these now turning into media drives with 2 1 TB drives as backup.
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