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Why is my RAID 0 so slow? HELP!!!

post #1 of 7
Thread Starter 
Why is my stripe slower then my single drive? The stripe is SATA I and the single is SATA II but I would think that the stripe should still be faster. If anyone has any ideas I would love to hear them!!!
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The Beast
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post #2 of 7
Quote:
Originally Posted by crashovride02 View Post
Why is my stripe slower then my single drive? The stripe is SATA I and the single is SATA II but I would think that the stripe should still be faster. If anyone has any ideas I would love to hear them!!!
Man, you got a lot of junk in your sig...........

What are you talking about, the stripe faster:
12.5ms vs 13.0ms access time.
64.0 MB/s vs 48.9 MB/s read times.
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post #3 of 7
If you mean why the RAID 0 has 199MB/s burst speed and the single SATA2 hdd has 205MB/s... it's actually normal in some cases.

First, burst speed is totally insignificant, the fact the single drive has 6MB/s in burst speed doesn't mean at all that it's faster than the stripe. The burst speed is the transfer speed of the files from the hdd's buffer to the main memory (ram).

Say you have a 16MB buffer, you'll transfer at 205MB/s only 16MB(if the buffer is full exactly with what you want to copy). The rest of the files are transfered with the speed pointed by the blue curve. The blue curve inducated the actual speed of the SATA2 hdd, while the red the stripe's speed. Although the red curve is not constant, it is clearly above the blue one, so the RAID0 stripe is clearly faster.

My 2 cents
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post #4 of 7
how old are those drives and what rpm?
post #5 of 7
The single drive probably has a bigger cache as well..
post #6 of 7
That chart looks awfully weird. Make sure you have shut down all background processes.
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post #7 of 7
Thread Starter 
Quote:
Originally Posted by CravinR1 View Post
how old are those drives and what rpm?
These are the drives in question. They are older but I would still think they would be faster.

Quote:
Originally Posted by 2Luke2 View Post
The single drive probably has a bigger cache as well..
It also has an 8MB cache.
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