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SSD for OS & Raid 5 HDD for Data/Games - Page 2

post #11 of 28
The CPU hit is really negligible with an i7 (or any modern CPU for that matter).

The issue is that your drive speed will suck as RAID5 is terrible at small writes, more so when using onboard RAID5. You'd be better off with a smaller RAID0 for speed plus a RAID1 (or RAID5) on the same drives storing backup images to get your redundancy - that way you avoid the issue.

Plus the fact that onboard RAID5 arrays have a horrible habit of falling over, and the array is unrecoverable anyway, negating the supposed benefit from parity in the first place...
post #12 of 28
Thread Starter 
Going to have to read up on that. Biggest thing is that I would need an extra harddrive correct?
post #13 of 28
Quote:
Originally Posted by Infrabasse View Post
Tyler you're not making things any simpler to understand.
Your second post deviates totally from your first and doesn't talk about the same problematic.
I meant to say the same thing, just elaborate more... sorry if it came across differently. Hopefully this helps:

RAID1+0 and RAID5 both offer redundancy AND increase performance. RAID5 does this through parity, and thus offers more "usable" disk space than RAID1+0. RAID1+0 achieves this by storing an extra copy of information in an unprocessed format (requiring no parity)... however, this unprocessed format leaves you with less usable space.

Buying a 4th drive so you can use RAID1+0 might very well be worthwhile looking into. RAID1+0 and RAID5 benchmarks (for a very old chipset, but it's probably not too much different with today's chipsets) are shown in the graphs above. Notice RAID5 with 4 drives offers significantly less performance than RAID1+0 (using 4 drives). Keep in mind that RAID5 also requires extra processing power.

Wikipedia throughly explains RAID formats if you want to read up:

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post #14 of 28
Quote:
Originally Posted by Wr3ckin_Cr3w View Post
Going to have to read up on that. Biggest thing is that I would need an extra harddrive correct?
Exactly.
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post #15 of 28
Quote:
Originally Posted by tylerstach View Post
Notice RAID5 with 4 drives offers significantly less performance than RAID1+0 (using 4 drives).
It's not nearly as simple as that - for many activities (anything primarily read-based or where only full stripe writes are performed), RAID5 will offer more performance than RAID10.
post #16 of 28
Thread Starter 
Confusing thread, i'm going to read up on Raid10
post #17 of 28
Quote:
Originally Posted by Wr3ckin_Cr3w View Post
Confusing thread,
Apologies for that - the reality is that storage, and setting it up properly, is a very complex area. It's not possible to say for every set of hardware what the 'best' way if setting it up is - you have to know exactly how the kit will be used to determine what will perform best in any given situation.

Quote:
Originally Posted by Wr3ckin_Cr3w View Post
i'm going to read up on Raid10
Good plan - feel free to ask questions when you have done. It's very difficult to present full details of all the different setups and the pros and cons of each without scaring the crap out of you, so it's much better for you to get a general idea of the options and ask questions to sort out the details...
post #18 of 28
Quote:
Originally Posted by the_beast View Post
It's not nearly as simple as that - for many activities (anything primarily read-based or where only full stripe writes are performed), RAID5 will offer more performance than RAID10.
This is true, I probably shouldn't generalize.
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post #19 of 28
I run a SSD on my system and have 3 HDs in RAID 5, and it works well for me.

The only time I wouldnt use RAID 5, is if I had a lot of HDs in the RAID or I had a workload that did a large amount of random writing.

RAID 5 works fine if you mostly read from the drives, and since I primary use it for storing stuff, it works well. Even writing to it is faster than 1 drive.
post #20 of 28
Thread Starter 
Okay, so I've settled on Raid 1+0. Two questions:

Are 4 drives needed? 4x1TB drives gives me 2 TB correct?

Can I have my OS on my SSD and just my data, games, and applications on the HDD? Does that even make sense?

Lastly, how can I get my current information on my 1 HDD to all of the others?

Also, can my mobo handle RAID 10 & 5 in the first place?

Sorry for the noob questions. TIA.
Edited by Wr3ckin_Cr3w - 6/21/11 at 5:58pm
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