RAID layout in a Storage Pool (code 32)

Question

Folks,

With the new version of code 32 what's the best choice for creating a storage pool with an "odd" number of drives?

Here is a screenshot of the possible RAID selection.

Specifically I'm wondering if you have 8 drives and want to create a RAID5 pool is it best to select RAID5 (8+1)? If so will it create a RAID Group in the pool using 7+1? Is that bad? What happens if you want to grow the pool, should you group it by 8 drives again so it creates another RAID Group at 7+1?

Thanks in advance for your response.

-Brian

bleblancUL · Answer

Great thanks Thomas!

Let me ask this then. What if your original pool is RAID5(8+1) but with only 8 drives (7+1) and the next time you add 9 drives, obviously the pool can use all 9 and create a (8+1) RG. What are the concenquences and are there any performance impacts or possible issues (say data loss in the future)?

-Brian

RRR · Answer

I would expect some sort of warning msg appears to warn you of what will happen. I'm sure if customers end up creating (7+1) RGs, almost all of them WILL make the mistake you just told us

VNX

RAID layout in a Storage Pool (code 32)

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