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SSD RAID Advice

post #1 of 9
Thread Starter 
So I just picked up a lot of 1760MB worth of SSD's on eBay...

They are all ex-demo units, so are in like-new condition. Included in the lot is 6 Intel 320 160GB drives. One is going in my laptop, and I am considering making a RAID array with the rest in my sig rig. I'll most likely sell the rest of the drives in the lot to offset most of the cost.

I have the ASUS P8Z68-V/GEN3, which has 6 SATA ports, so taking into consideration optical drive and mechanical storage drive, gives me 4 SATA ports to work with. I was considering doing a 4-way RAID 0 array for 640GB of storage, Although I have a few questions about the feasibility of this.

Firstly, will I notice much of a performance difference from my current drive (OCZ Vertex 2 120GB), and will that performance scale reasonably well with 2, 3 or 4 drives in RAID?

Secondly, what can be said about the reliability of SSD's in RAID? These are Intel drives, which I've heard are some of the best, so I don't think there should be any issues apart from the lack of TRIM support (supposedly fixed in the next Intel RST driver)

Finally, what is the optimal RAID configuration for SSD's, if there is one. Fault tolerance isn't critical, as regular backups will be made and there will be no critically important data stored, but I would like a nice boost in speed as well as capacity if at all possible.
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post #2 of 9
to answer one of your questions

Intel
Up to 270 MB/s
Sustained Sequential Write
Up to 165 MB/s

OCZ
Sustained Sequential Read
up to 285MB/s
Sustained Sequential Write
up to 275MB/s

However the random write will be better on the Intel and 2 of them in RAID0 will beat the OCZ IMHO.
Quote:
I was considering doing a 4-way RAID 0 array for 640GB of storage

A single drive failure destroys the entire array because when data is written to a RAID 0, if they are used it might present a problem later on, Try running IntelToolBOX and upgrading the firmware on the Intel's to the latest via bootable CD.
Edited by dlee7283 - 3/29/12 at 3:42pm
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post #3 of 9
I have 2 OCZ agility 3's in RAID 0 and I love the speed. Add the speed to a caching tool and you'll get these speeds.

378
post #4 of 9
Quote:
Originally Posted by K62-RIG View Post

I have 2 OCZ agility 3's in RAID 0 and I love the speed. Add the speed to a caching tool and you'll get these speeds.
378

he doesn't have OCZ Agility 3 or does he?
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post #5 of 9
Will you notice much of a performance difference? Possibly, or possibly not. It depnds on what you are doing mostly and if the better sequential speeds will help you or not because 4K speeds and access times really don't change. If you run a lot of programs and VMs and transfer large amounts of data a lot then yes you will, if not then no.
Quote:
Originally Posted by K62-RIG View Post

I have 2 OCZ agility 3's in RAID 0 and I love the speed. Add the speed to a caching tool and you'll get these speeds.

378

-_- That is not the speed of your SSDs, that is fancy cache or what ever you are using so crystal disk mark is actually running the test on your RAM. Makes no difference really.
post #6 of 9
you're right. You won't notice that much of a difference. It is very snappy and responsive though. I just love to look at those numbers. biggrin.gif I have uninstalled it now as I just wanted to see how much I could tweak it. Alot of other people could get their read speeds up but not the write speeds (according to benchmarks)
post #7 of 9
Thread Starter 
Quote:
Originally Posted by dlee7283 View Post

However the random write will be better on the Intel and 2 of them in RAID0 will beat the OCZ IMHO.
A single drive failure destroys the entire array because when data is written to a RAID 0, if they are used it might present a problem later on, Try running IntelToolBOX and upgrading the firmware on the Intel's to the latest via bootable CD.

I thought this would be the case with the read and write speeds. Thanks for confirming. I plan to do a full secure erase and firmware update on the drives as soon as I get them. They are ex-demo, so only lightly used and I'll likely upgrade them well before they fail. As for the drive failure aspect, I always keep daily backups of my data so this shouldn't be too much of an issue. I consider myself reasonably familiar with raid setups and their benefits with mechanical HDD's, just a little unsure how this translates to SSD performance.
Quote:
Originally Posted by Sean Webster View Post

Will you notice much of a performance difference? Possibly, or possibly not. It depnds on what you are doing mostly and if the better sequential speeds will help you or not because 4K speeds and access times really don't change. If you run a lot of programs and VMs and transfer large amounts of data a lot then yes you will, if not then no.

The array would likely be used as an OS drive, but with the added capacity I could probably store a lot more of my programs and games on the solid state storage for increased access times. The main appeal is a 640gb solid state drive with greater or equal performance to my current drive, granted that it proves to be a realistic setup.
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post #8 of 9
Quote:
Originally Posted by Sean Webster View Post

Will you notice much of a performance difference? Possibly, or possibly not. It depnds on what you are doing mostly and if the better sequential speeds will help you or not because 4K speeds and access times really don't change. If you run a lot of programs and VMs and transfer large amounts of data a lot then yes you will, if not then no.
-_- That is not the speed of your SSDs, that is fancy cache or what ever you are using so crystal disk mark is actually running the test on your RAM. Makes no difference really.
You can get 6.2gb/s with ram disk but when you store a game on it and access it you can never get that 6.2GB/s speed or even 3GB/s, I tried it with warcraft 3 on a ram disc and I hadn't have much diffrence from my stock hdd
(Tried running stuff on RAM disk and didn't get SSD speeds)
Quote:
Originally Posted by brodieboy143 View Post

I thought this would be the case with the read and write speeds. Thanks for confirming. I plan to do a full secure erase and firmware update on the drives as soon as I get them. They are ex-demo, so only lightly used and I'll likely upgrade them well before they fail. As for the drive failure aspect, I always keep daily backups of my data so this shouldn't be too much of an issue. I consider myself reasonably familiar with raid setups and their benefits with mechanical HDD's, just a little unsure how this translates to SSD performance.
The array would likely be used as an OS drive, but with the added capacity I could probably store a lot more of my programs and games on the solid state storage for increased access times. The main appeal is a 640gb solid state drive with greater or equal performance to my current drive, granted that it proves to be a realistic setup.

Lynix tech typs did a movie on his raid 0 ssd and he got same plorbem low write speeds and he found out it was his settings wrtie back cash or something and sorted it out near or same max read write
Edited by Iwamotto Tetsuz - 6/14/15 at 8:52pm
post #9 of 9
Thread Starter 
Quote:
Originally Posted by Iwamotto Tetsuz View Post

Lynix tech typs did a movie on his raid 0 ssd and he got same plorbem low write speeds and he found out it was his settings wrtie back cash or something and sorted it out near or same max read write

Necro'd thread but if anyone is interested in a follow up, I ended up getting an Intel 520 Series 240GB as a boot drive instead. Then picked up a second about 12 months on and now have those in RAID0 for my boot drive. The 320's ended up as RAID0 in my MacBook Pro for a while, before I decided I no longer use it enough to justify them and put a mechanical back in, selling the 320's. Worked surprisingly well in the MBP and I have no issues with RAID 0 at all with the 520's. Had to mod some BIOS Oproms to get TRIM to work on my z68 but that wasn't too bad. Write back cache is recommended by the Intel RST Drivers for best performance as is, have it all set up and all is quite satisfactory.
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