RAID question.

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irrelevant
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RAID question.

Post by irrelevant » July 26th, 2013, 8:58 am

OK, for my next question.


I have 6 identical drives that I will more than likely put into a RAID array, at least once I have tested them.

My current ideas would be wither a 5+1 RAID 5 array, or 4+2 RAID 6. (Assuming that I have the option with the controllers or software I'll be using.

Does anyone have an opinion as to which would be best, or another better solution? Your reasoning would be useful also.


And what would anyone consider a cost-effective (Read cheap!) backup solution for storage in the 10s of Terabytes?

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wd
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Re: RAID question.

Post by wd » July 27th, 2013, 11:29 am

RAID 5 the problem that I can think of is if a disk goes the recover time is painful when rebuilding large drives
RAID 6 is suppose to alleviate some of that ....this seems to be a good article http://www.techrepublic.com/blog/the-en ... y-want-it/
then you do have enough drives to go RAID 10
https://en.wikipedia.org/wiki/RAID#Comparison
more on raid 10 http://www.acronis.com/resource/tips-tr ... id-10.html

irrelevant
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Re: RAID question.

Post by irrelevant » July 28th, 2013, 10:33 am

I'm honestly not a huge fan of raid 10.

I don't really need that much performance, if nothing else the redundancy is the goal,

the problem with raid 10, is that if I were to have 3 sets of 2 mirrored disks. then if I lost one drive it would be OK, and simple to rebuild the single disk. If I lost 2 from the same mirrored set, I would be down and the array unusable. If I lost 2 drives from a raid 5 I would be down, if I lost 2 from a 6 I would be OK.

so the biggest downside for raid 10 vs 6 would be the amount of storage available. the amount of redundancy would be somewhere between raids 5 and 6.

I'm still leaning towards 6 I think, unless I can find a cheap backup solution. so at least this array will be 16Tb or so. assuming that will be enough space anyway

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Re: RAID question.

Post by wd » July 28th, 2013, 12:42 pm

yeah if you don't need the speed the 6 is sounding better to

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