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Quad RAID WD640AAALS or SSD?

post #1 of 7
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Im getting some money and im not sure if i want to pick up an SSD or buy 2 more WD640 caviar blacks. I have 2 right now and adding two would let me RAID0 4 of them, but which will be faster?
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post #2 of 7
You can pick an SSD that would be much faster than those raided together.
What will the drive be used for?

Also, I wouldn't put more than 3 drives in raid 0 personally. Each drive you add increases the chance of having 1 drive failure which results in all data loss.
    
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post #3 of 7
Well, if I recall correctly, you can have 6 HDDs before you saturate the bandwidth of SataII. So you're fine there, and technically, the HDDs will have higher read and write speeds.

HOWEVER. They will have much higher seek times, even if you shortstroke the drive massively.

The reason SSDs are so snappy is becuase they have crazy fast seek times; 0.1ms compared to 9-11ms of a RAID HDD setup.
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post #4 of 7
You'll be amazed at an SSD, you'll just have to shell out the $$ and get used to space constraints.

I have a 3-disk RAID 0 and honestly you can't tell any difference compared to the 2-disk RAID 0 machines I have.

I just built a machine on a 120GB OCZ Vertex 2, and I'm frankly shocked how quickly certain things load, compared to the RAID 0 PCs I have. It's a huge improvement in certain situations, and that's not just an OCN exaggeration.

After building this SSD based machine for someone else, I'm planning on adding one to my sig rig as soon as I have the $$ for a 240GB. That's how good it is.

If storage size is your concern, you're not going to beat a RAID array of platter drives unless you have some serious cash. Know that a 4-disk RAID 0 has alot of failure potential also...
Edited by 2thAche - 3/13/11 at 7:05am
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post #5 of 7
Thread Starter 
Quote:
Originally Posted by 2thAche View Post
You'll be amazed at an SSD, you'll just have to shell out the $$ and get used to space constraints.

I have a 3-disk RAID 0 and honestly you can't tell any difference compared to the 2-disk RAID 0 machines I have.

I just built a machine on a 120GB OCZ Vertex 2, and I'm frankly shocked how quickly certain things load, compared to the RAID 0 PCs I have. It's a huge improvement in certain situations, and that's not just an OCN exaggeration.

After building this SSD based machine for someone else, I'm planning on adding one to my sig rig as soon as I have the $$ for a 240GB. That's how good it is.

If storage size is your concern, you're not going to beat a RAID array of platter drives unless you have some serious cash. Know that a 4-disk RAID 0 has alot of failure potential also...
Ya, but WD is a good company so im not too concerned about failure, but i do want as quick boot times as possible (to showoff) so ill grab an SSD and pair it with my current RAID arraty. Thanks guys +rep to all.
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post #6 of 7
WD all the way!!
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post #7 of 7
SSD for OS (especially one with higher IOPS (4k random writes) like a Vertex 2) would easily dominate mechanical drives as far as boot times, etc.

You'd be amazed really.
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