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post #11 of 23
It looks like you have write-back caching enabled. Which skews benchmark results.
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post #12 of 23
To be honest, It may have been enabled. That benchmark was done months ago and I dont remember. I do know that file transfers to the array from an SSD were on par with the benchmark and when I had a gigabit network in my old home, I could constantly saturate it with >100Mb/s writes and reads.

Even though I didnt need it, I was very close to buying an intel dual NIC to have teaming and better bandwidth.
 
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post #13 of 23
My sig rig running raid-5

HardDriveRating.jpg

May have to zoom in to see, apologies
    
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post #14 of 23
Quote:
Originally Posted by Manyak View Post

To rephrase: Do NOT do a RAID 5 unless you don't mind having the I/O performance of a 486.

Exactly

http://www.cyberciti.biz/tips/raid5-vs-raid-10-safety-performance.html
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post #15 of 23
Quote:


I'm not trying to be rude by saying this, but that article is crap.... Its pretty much the guys opinion that because drives are cheap you should never used raid 5. Then he goes on to compare a 3 disk raid 5 array to a 4 disk raid 10 array and doesn't give ANY details.

Yes, raid 10 is faster and could have more than a single drive fault tolerance depending on the drive that fails. For my setup specifically, If I wanted 6TB from raid 10, I would have needed 6 drives. I couldn't do that without buying an expensive controller card. (None of the 3 intel based motherboards I have allow a 6 disk raid setup even though they have 6 ports.)

I get 6TB from only 4 drives in raid 5 which works in my system and allows me to have another drive for the OS or whatever. That was the biggest deciding factor for me. I chose raid to have some fault tolerance and easy manageability since I use WHS and the 2011 didn't include drive extender.


To the OP, I hope you did your research on raid before deciding to implement it. If not, then I suggest you do. Also, don't think of using it as a backup solution because that's not what its for. Also, keep in mind, if you go with raid 5 for example, you cant easily change it after. If you have 6 TB of data on there, you will need to find another 6tb of space to move it to, before you do anything to the raid array.
 
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CPUMotherboardGraphicsRAM
i5-2400 Gigabyte GA-Z68MX-UD2H-B3 Sapphire HD7850 OC 8GB Corsair Vengence 
Hard DriveOptical DriveCoolingOS
WD Black w/ 60gb Vertex plus SSD in SRT LG BluRay Scythe Ninja Mini Passive Windows 7 Home Premium 
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i5-2400 Gigabyte GA-Z68MX-UD2H-B3 Sapphire HD7850 OC 8GB Corsair Vengence 
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WD Black w/ 60gb Vertex plus SSD in SRT LG BluRay Scythe Ninja Mini Passive Windows 7 Home Premium 
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post #16 of 23
Quote:
Originally Posted by LB11 View Post

I'm not trying to be rude by saying this, but that article is crap.... Its pretty much the guys opinion that because drives are cheap you should never used raid 5. Then he goes on to compare a 3 disk raid 5 array to a 4 disk raid 10 array and doesn't give ANY details.
Yes, raid 10 is faster and could have more than a single drive fault tolerance depending on the drive that fails. For my setup specifically, If I wanted 6TB from raid 10, I would have needed 6 drives. I couldn't do that without buying an expensive controller card. (None of the 3 intel based motherboards I have allow a 6 disk raid setup even though they have 6 ports.)
I get 6TB from only 4 drives in raid 5 which works in my system and allows me to have another drive for the OS or whatever. That was the biggest deciding factor for me. I chose raid to have some fault tolerance and easy manageability since I use WHS and the 2011 didn't include drive extender.
To the OP, I hope you did your research on raid before deciding to implement it. If not, then I suggest you do. Also, don't think of using it as a backup solution because that's not what its for. Also, keep in mind, if you go with raid 5 for example, you cant easily change it after. If you have 6 TB of data on there, you will need to find another 6tb of space to move it to, before you do anything to the raid array.

K well search anywhere on the internet, you'll definitely find that 99% recommend RAID10
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post #17 of 23
Quote:
Originally Posted by Krud View Post

My sig rig running raid-5
HardDriveRating.jpg
May have to zoom in to see, apologies

Those are read speeds. The question is about write speeds.
Quote:
Originally Posted by LB11 View Post

I'm not trying to be rude by saying this, but that article is crap.... Its pretty much the guys opinion that because drives are cheap you should never used raid 5. Then he goes on to compare a 3 disk raid 5 array to a 4 disk raid 10 array and doesn't give ANY details.
Yes, raid 10 is faster and could have more than a single drive fault tolerance depending on the drive that fails. For my setup specifically, If I wanted 6TB from raid 10, I would have needed 6 drives. I couldn't do that without buying an expensive controller card. (None of the 3 intel based motherboards I have allow a 6 disk raid setup even though they have 6 ports.)
I get 6TB from only 4 drives in raid 5 which works in my system and allows me to have another drive for the OS or whatever. That was the biggest deciding factor for me. I chose raid to have some fault tolerance and easy manageability since I use WHS and the 2011 didn't include drive extender.
To the OP, I hope you did your research on raid before deciding to implement it. If not, then I suggest you do. Also, don't think of using it as a backup solution because that's not what its for. Also, keep in mind, if you go with raid 5 for example, you cant easily change it after. If you have 6 TB of data on there, you will need to find another 6tb of space to move it to, before you do anything to the raid array.

The biggest reason RAID10 is preferred over RAID5 is that there is a lower chance of having a URE during a rebuild. The other stuff doesn't matter so much.

Also, you can migrate from RAID5 to whatever other RAID you want, as well as add and remove drives at any point in time. Well, at least you can on a real RAID controller.
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post #18 of 23
This obviously isn't a 1:1 test, but it says something about how poor RAID 5 performs on lower end RAID controllers and shows how well RAID 10 performs in general, especially when paired with a high end card.

T420 with 3 15k 300GB 3.5's on a PERC H310:

m1fj4.jpg

T620 with 4 15k 300GB 2.5's on a PERC H710:

8Ayn3.jpg

The 310 is no high class performer, but I can't see it as performing worse than the slop that intel integrates into their PCH's.
    
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post #19 of 23
I can actually show you some good RAID6 performance out of my server's array. Just as soon as I get my replacement drive from RMA and it's done rebuilding rolleyes.gif.
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post #20 of 23
I would hope that the performance could be described as "good" for an array driven by an $800 card.
    
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