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2x 1TB SSD (non RAID) vs 4x 500GB SSD (2 RAID 0 arrays) - worth it?

post #1 of 8
Thread Starter 
Who here runs RAID 0 setups?

My 2TB HDD recently failed (is showing raw in CMD CHKDSK, bought 4 years ago), so I was going to get some more storage, since right now I only have 2 drives in my rig, a 480GB HyperX Predator PCIe SSD (boot drive, a few games), and a 250GB SanDisk SATA 3 SSD. Storage space is tight with only the two SSDs, and with the Black Friday and Cyber Monday sales coming up, I was going to get some new drives.

Originally, I was going to get two 1TB Samsung 850 EVO SSDs. However, I thought about doing four 500GB 850 EVOs, in two RAID 0 setups. The idea is that I'll still 'essentially' have two 1TB storage locations, but two 500GB 850 EVOs in RAID 0 will be faster than a single 1TB.

The 850 EVO is advertised as having:
Max Sequential Read
Up to 540 MBps
Max Sequential Write
Up to 520 MBps
4KB Random Read
Up to 98,000 IOPS
4KB Random Write
Up to 90,000 IOPS

Now, I know it won't be exactly double the speed, theoretically, but I have looked at Benchmark simulations, and the difference from a single drive to 2 in RAID 0 is significant. Even though SATA 3 has a max speed of 600MB/s, it should still be faster than that since it would be pulling from two separate drives simultaneously.

So that's the idea. I was looking for some feedback from some of you that run/have ran RAID 0 setups, and if you found it to be beneficial in real world applications (I do gaming and some video editing, but I like the speed of SSDs and am not considering an HDD). And yes, I am aware that it won't really improve games (other than slightly faster loading time), and I also know the difference between RAID 0, 1, 5, 6, 10, etc). I don't really need data protection, as nothing will be of significant importance, and I'm aware that if one drive fails in RAID 0, they both lose everything, which is fine, because it's just an alternative to a single 1TB drive. I will be doing weekly backups to an external as well. I'm essentially making two faster drives out of 4 single drives. My motherboard is an ASUS ROG Maximus VIII Formula Z170, and I was going to use the onboard RAID controller.

Sorry for the long post. Thanks in advance.
Edited by apalio - 11/25/16 at 4:46am
post #2 of 8
I would just do it just because. Your system will be significantly faster but please for the love of god make sure you back up. mad.gif
 
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post #3 of 8
Why not get any of these SSDs and pool them together? wink.gif
That way you either have 2x1TB pools, or heck, even 1x2TB pool, and if a drive dies, only the data on it is lost.

Personally I wouldn't consider RAID 0 with SSDs unless there is a very specific workload that demands it.



P.S. Hi Lord Xeb smile.gif Long time no see
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post #4 of 8
I ran six Intel 120GB 520 series SSDs in a RAID 0 on an Areca 1882 controller for over 4 years without any trouble at all.
It was used pretty heavily too.
Anecdotal? Perhaps.

On compressible data benchmarks I could hit near 3GB/s transfer rate.
4k transfers really don't improve a whole lot over a single SSD but it was fun running that RAID.
post #5 of 8
Go the non-raid setup. real world performance will not see a huge benefit. You already have raid controllers in the ssds, so you are raiding pairs of raid controllers.... so many points of failure.
I'd only go raided SSDs if they were for a temp/swap drive where all data could be lost and it would not matter.
If you really want some fast storage, go PICe M.2 adapter.
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post #6 of 8
Quote:
Originally Posted by Lord Xeb View Post

I would just do it just because. Your system will be significantly faster but please for the love of god make sure you back up. mad.gif

He right entire raid 5 and 6 arrays can just up and die redundancy drives or not.

it;s not so bad if it's just steam games and what not but, video and photo editing or file storage you'd want something better.

https://www.youtube.com/watch?v=yAuEgepZG_8
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post #7 of 8
I'm new to this site but not new to SSDs and RAID.

In 2012 I built a RAID 0 array from 4 x 480 GB OCZ Vertex 3 SSDs and an inexpensive Highpoint 2720SGL card providing 8 x SATA III (6Gb/s) ports. These drives are high reliability models, with 2 million hour MTBF ratings.

I have since added 4 more drives in another RAID 0 array - 8 SSDs in the system, all the same brand and model. You can pick up surplus 480 GB Vertex 3 drives right now on eBay for about $100 each. I have spares.

I don't know whether the folks advising you against using RAID 0 have actual long-term experience with RAID 0 arrays of SSDs, but I've got 5 years on multiple systems.

To be quite honest, building these arrays has been the best thing - bar none - I've ever done for my computing experience, and I'm a career engineer who started in the 1970s with punch cards. I have never, ever had a fault or data glitch with these arrays. The system always runs for as long as it takes before I need to do a reboot for updates or some installation.

Some other factors to consider, based on my experience:

  • Windows would prefer everything to be on drive C:. That's why everything defaults there, and it really does run best that way.
  • SSDs would like you to over provision. Buy twice the storage you think you'll need by a couple of years from now.
  • Once you get past infant mortality, SSDs are solid state, right? If you've mounted them nicely and they're not rattling around, they're less likely to fail than an electromechanical spinning disk. Just make sure everything stays cool (SSDs themselves don't make much heat).
  • With multiple SSDs in an array, the write load is spread, lengthening useful life. Useful life is also lengthened with larger SSDs.

I also have another system with a RAID 5 array of Vertex 3 SSDs because it's a server and needs a very high uptime. This one is controlled by Intel RST through motherboard SATA III ports. So far in almost 2 years of 24/7 use it's had zero glitches. Performance is decent, though not nearly as good as a RAID 0 setup. It simply takes time to calclulate the redundancy data. And frankly it's overkill unless you just can't stand even a little downtime to swap in hardware and restore a backup.

Unlike some of the others up above I highly recommend you get good, high quality drives and make your RAID 0 - and do regular system image backups to mitigate your potential for loss of data no matter WHAT setup you choose. I do mine nightly.

Hope this helps!

-Noel
post #8 of 8
Thread Starter 
Quote:
Originally Posted by NoelC View Post

Hope this helps!

-Noel

Hey Noel,

First off, thanks for the reply. I know this is a little old, but it's still nice to have your input. I actually ended up just buying 2 500GB 850 EVOs and running them independent as my G: & H: drives. I was originally going to get 4x 250GB 850 EVOs for the RAID 0, and was planning on doing weekly backups, or sooner if I added something important.

I suppose it's still possible for me to do a RAID 0. I've since got a new case (Thermaltake Tower 900), which has tons of room for more drives. I found out my MOBO's onboard RAID controller isn't the best, so I would probably get a dedicated controller. I guess if they go on sale again, maybe I'll get 2 more 500GB drives and do a RAID 0, and then have a 2TB array.
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