Write-Back Cache for RAID 6

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apalio

Commendable
Apr 25, 2016
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Hi all,

I plan on doing a RAID 6 array with 4x 8TB WD Red drives. I read that RAID 6 can take a hit to speed due to the processing of the parity information, but writeback caching can actually make the drives faster than even a RAID 10 setup. My main question is, do I need a dedicated RAID controller for write-back caching? I am using a 6950X, ASUS Rampage V, and Corsair Vengeance 3200MHz 128GB RAM. I believe the onboard controller is sufficient for the array, but I do not know about writeback caching, as I have never used it. I don't need a lot of performance with teh array, as it will only be used for long term storage. I have NVMe drives for the rest of the system.

Thanks for your time.
 
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13thmonkey

13thmonkey

Titan
Jan 10, 2006
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Do you NEED 24x365 access? Can you afford a few hours of not having access?

If you do not, and you can afford the downtime then use 2x8TB for local storage and 2x8TB for backup in a NAS box or similar.

RAID is not a backup solution, RAID is an uptime solution. RAID will likely not outlast your mobo, i.e. your mobo dies, your raid array dies, your data dies. Hope this isn't teaching you to suck eggs, but RAID is rarely the right solution for the consumer, or the prosumer.
 
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A

apalio

Commendable
Apr 25, 2016
61
0
1,660
I am aware that it is not a backup solution. Everything will also be backed up to external drives as well. This is for storage of raw footage and finished products for video production. I want the redundancy, so that if a drive or two fails, it can be replaced and the data is still intact. Uptime is preferred, as the data may need to be accessed at any time. The other drives in the system are a 512GB 850 Pro, 512GB 960 Pro, and a 1TB 960 Pro, used for boot drive, media cache/scratch disk, and project/source media, respectively.
 
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13thmonkey

13thmonkey

Titan
Jan 10, 2006
24,798
350
75,790


It is hardware independent, you can move it to a new mobo, in case of hw failure, and tell Windows it exists and it'll find it, you can expand it without rebuild, other benefits. Have a play? It's all managed In windows, one less thing to go wrong? Check the speed out.
 
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