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Which RAID Card? - Page 2

post #11 of 17
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Anyone else that can comment? I think im going with the 6i or 5i seeing that its normal price is around $600. So now its 6i vs 5i
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post #12 of 17
Quote:
Originally Posted by ericeod View Post
The Perc 5i/6i are PCI-E x4 cards. Note I edited my previous post.
The PERCs are x8 cards, not x4. Not that it really matters - there aren't many boards with x4 (physical) slots, and many of those are open ended anyway...

Quote:
Originally Posted by IntelLover View Post
Anyone else that can comment? I think im going with the 6i or 5i seeing that its normal price is around $600. So now its 6i vs 5i
The 6/i is faster but a little more expensive than the 5/i. It also offers RAID6, which the 5/i does not.

But if all you intend to do is run RAID0 then either card will be a waste of money - both in the initial purchase price and in running costs.

I would go for something like an Intel SASWT4I Controller Card (or other full-features LSI rebrand) instead. You can often find them for less than $50 on eBay if going used, or new they go for ~$150.
post #13 of 17
Thread Starter 
I will be running raid 10 as I believe that offers a performance advantage over RAID 5.
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post #14 of 17
Sorry - I knew you were running RAID10, but my finger must have slipped or my keyboard is crap. That's the reason I didn't suggest a Dell SAS 5/iR or 6/iR or an HP SC40Ge or SC44Ge (which are cheaper still) - as they don't do RAID10. You need the LSI-firmware based cards rather than the cheap OEM cards for that.

However, be aware that RAID10 does not always offer a performance advantage over RAID5. A RAID5-based array will do sequential reads much faster than a RAID10 array for example, but the small write performance suffers a lot...
post #15 of 17
Quote:
Originally Posted by IntelLover View Post
I will be running raid 10 as I believe that offers a performance advantage over RAID 5.
In sequential read performance, RAID10 provides up to N/2 performance while RAID5 provides up to N-1 performance.
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post #16 of 17
Thread Starter 
Can someone give advice on if I should go RAID 5,6,10,50, or 60? Also, the PERC 5/i or 6/i or another RAID card. People here seem to like the PERC cards.
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post #17 of 17
Quote:
Originally Posted by IntelLover View Post
Anyone else that can comment? I think im going with the 6i or 5i seeing that its normal price is around $600. So now its 6i vs 5i
The 6i goes for less than $600 direct from Dell....

Quote:
Originally Posted by IntelLover View Post
Can someone give advice on if I should go RAID 5,6,10,50, or 60? Also, the PERC 5/i or 6/i or another RAID card. People here seem to like the PERC cards.
This depends on your needs and intended application... If you intend on only having a single array that will contain your boot volume, you should avoid RAID-5/6. RAID-50/60 just takes two (or more) RAID5 or RAID6 arrays and stripes them in RAID-0 (if I remember correctly), but you still pay a performance penalty under certain applications for parity calculations. And RAID-50 requires 6-drives minimum, RAID-6 requires 8 disks minimum.

And you know, it's also highly subjective. Different people have a different feel as to what's "enough" in terms of speeds. Once you get the card, well, you should just set things up with different RAID levels and determine what works best for you...
Edited by ComGuards - 6/12/10 at 12:04am
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