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What benefit do I get with RAID

post #1 of 13
Thread Starter 
Not to familiar with the reason or process with RAID... I'm building a new computer, and realized one of my backup SSDs went bad which I was going to install on my server as OS drive. I had to take my primary SSD (OCZ vertex 4) and install it on the server as OS Drive...

That being said, my new build is now without SSD...

I was thinking about getting the Samsung 850 120gb (times 2) to make a RAID arrangement.... Just curious what benefit I'm going to receive, and if it's worth the extra 100 bucks for it.

I know with a RAID 0, I'll have faster overall perforamnce, but with chance of things going bad.... How likely is this? I guess if one of the drives happen to fail, I'm out of the game and will have to fix the bad SSD? Does it decrease a SSD's reliability when you go RAID?

I would really be interested in RAID 0... Not too interested in RAID 1 or 5 (3 drives is too much $$ lol) not sure what RAID 10 is, I'll have to google that one.

I'm not really familiar on how to do it either... is it easy to setup?

and lastly, that SSD I mentioned.... is it a good SSD to use for this?

my mid life upgrade is a Z77 sabertooth with i5 2500k and 9gb of kingston hyper x ram and GTX 970

I can alternatively get 1 Samsung 850 24gb and just be happy with the double storage capacity and it's plenty fast I guess...
Edited by razorseal - 5/1/15 at 8:12am
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post #2 of 13
I wouldn't recommend RAID for SSD unless you are benchmarking SSD performance or intentionally building an overkill rig. It shouldn't matter whether reading a terabyte of data takes one second or two, in reality. You are also better off backing up to HDD when protecting against data loss.

The OCZ drive in your server could be a bit of a liability. I'm willing to bet that the failing SSD was also from OCZ. For good measure, you should definitely make sure the firmware is up to date and check to see if the bad drive is still under warranty.

Samsung and Crucial are the best brands to look for. The Samsung 850 EVO is a good choice.

Since you were considering spending some extra money, you would get the most value from buying a bigger SSD. SSD's lose performance as more and more data is written and as space is used. Smaller SSD's will lose performance at a higher rate because they fill up quicker.
post #3 of 13
I think you meant to say what benefits do I get with RAID on SSD drives. In which case, to my knowledge, there really aren't any? SSD's are inherently fast enough that putting them in a raid 0 configuration won't really impact overall performance. I'm not sure on this so feel free to correct me if I'm wrong.

As far as the benefits of RAID overall, it stands for redundant array of independent drives so its "purpose" is to make sure data is mirrored in some way. RAID 0's purpose is to increase read times. And as far as reliability, I reallllly wouldn't worry about that to be honest. Ever had a hard drive fail on you? Neither have I.
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post #4 of 13
I'm not a fan of RAID-0, it doubles the chances of drive failure crippling your system. RAID-1 makes sense if you don't want any downtime due to drive failure. Most of my systems are now RAID-1 or RAID-5 since I've had a lot of hard disk failures these past few years.
post #5 of 13
Thread Starter 
Thanks guys! I appreciate it...

The failed SSD was a Corsair Nova 60gb (older SATA 2) I could always call Corsair and see what they're willing to do for me, but I purchased it a while back (8/11) so I'm not sure if they'd be willing to help. Who knows... Maybe they'll send me a newer one lol

The OCZ has been going for a little while on this computer with no issues. It's plenty fast too (about 1 or 2 years old now) I'll just get 1 Samsung 850 and call it a day. I'll go for the increased size one as well.

Thanks again! You guys saved me some $$$

I do want to look into backup of some sort though. When a drive fails on a RAID-1, how do you know it has failed if the system is still running? and how about finding out which drive failed?

I wouldn't mind just having the computer do a daily backup of my SSD to my WD Blue (like create and move an image over or something?) so if the system crashed and SSD failed, I can re-image it back?
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post #6 of 13
Quote:
Originally Posted by tombom View Post

I think you meant to say what benefits do I get with RAID on SSD drives. In which case, to my knowledge, there really aren't any? SSD's are inherently fast enough that putting them in a raid 0 configuration won't really impact overall performance. I'm not sure on this so feel free to correct me if I'm wrong.

As far as the benefits of RAID overall, it stands for redundant array of independent drives so its "purpose" is to make sure data is mirrored in some way. RAID 0's purpose is to increase read times. And as far as reliability, I reallllly wouldn't worry about that to be honest. Ever had a hard drive fail on you? Neither have I.

All RAIDs other than 0 do is reduce the chances of data loss due to drive failure, helping to ensure continuous operation should one or more drives (depending on the RAID) fail. However, there other cause of data loss that RAID will not protect against, such as user error, hardware failure, malware, natural disasters, fire, theft, etc. The only protection from any of that is to keep multiple backups in multiple locations that are connected to the computer only to update the backup.

In real time use, RAID 0 will give little or no increase in performance unless dealing with really huge file transfers. Even then, the gain will not be worth the risks.

Methinks you meant RAID 0's purpose is to decrease read times (or increase read speeds). It also creates a single volume over all the drives in the array. However, it also increases the chances of drive failure taking out data from all the drives in the RAID.

There are only two kinds of HDDs: those that have failed and those that haven't failed yet. Any HDD, no matter how good, can fail with or without warning at anytime. The fact you haven't had a HDD fail just means you have been exceptionally lucky (and I'm jealous! wink.gif ). I've had three fail on me before I retired them, one just late last year. I also received one DOA late last year.
     
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post #7 of 13
RAID is not a backup, it's merely physical fault tolerance. If a drive dies, your RAID controller will usually complain to you during POST.
post #8 of 13
Quote:
Originally Posted by razorseal View Post

I wouldn't mind just having the computer do a daily backup of my SSD to my WD Blue (like create and move an image over or something?) so if the system crashed and SSD failed, I can re-image it back?

That's a matter of software. You can use something like Acronis TrueImage to perform regular disk-2-image backups. I think there's a version that comes included with certain WD external HDDs that should be suitable. Or you can buy it retail.
post #9 of 13
Quote:
Originally Posted by Ippy2 View Post

Quote:
Originally Posted by razorseal View Post

I wouldn't mind just having the computer do a daily backup of my SSD to my WD Blue (like create and move an image over or something?) so if the system crashed and SSD failed, I can re-image it back?

That's a matter of software. You can use something like Acronis TrueImage to perform regular disk-2-image backups. I think there's a version that comes included with certain WD external HDDs that should be suitable. Or you can buy it retail.

Macrium Reflect Free (here is a good tutorial on how to use Macrium Reflect) is also excellent for imaging a drive. The image, along with a restore CD or USB stick, can easily be used to restore a drive.
     
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post #10 of 13
also see part 2.
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