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Different hard drive speeds?

So I'm building a new computer, and getting a 1TB HDD as well as putting in 2 250GB old laptop hard drives and a SSD.

I was planning on RAID 0(ing) the 2 laptop hard drives because they are the exact same. But I am wondering if i can also RAID 0 the 1TB HDD with them as well. The 1TB is a 7200rpm, 64MB cache WD HD, while the two 250GB's are 5400rpm, not sure of the cache.

So I was wondering if I am able to RAID 0 the faster 1TB with the slower 250GB's. And if I am, how would that work with the speeds? If a space shows up as 1.5TB (without being formatted, simple number), then with 1TB of that be faster than the rest or would the whole space run up to par with the 1TB's speed?

Could anyone provide verification or help for me please?
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  1. Best answer
    No, you can't RAID0 1TB + 2x250 GB HDDs. Even with RAID 0 2x250 GB drives will be relatively slow /should be slower as the single 1 TB 7200 drive/.
  2. Ok, thanks for the reply. That's kind of what I thought. I really just want to RAID0 the 250GB drives just for a convenience matter, so I have a single drive instead of having to switch between 2.
  3. Best answer selected by monster10888.
  4. Ok, thanks for the reply. That's kind of what I thought. I really just want to RAID0 the 250GB drives just for a convenience matter, so I have a single drive instead of having to switch between 2.
  5. You may JBOD the 2 250 GB HDDs, which is considered safer and will give you one large volume.
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