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I have been reading a lot of warnings about Raid-6 becoming less and less safe to use due to the storage amount per disk as well as array sizes increasing.

What are the best practice limits/when does it make sense to take the economical hit of using Raid-10 instead? (at which size)

We are considering these disk combinations: Hotstorage:

  • 10x4TB SSDs

Coldstorage:

  • 10x10TB HDDs
  • 15x10TB HDDs
  • 12x12TB HDDs

Raid-6 would save us a lot of money, yet is it safe to use at those sizes in terms of normal failures and rebuild times.

Thanks

Seth
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user2693017
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    https://www.zdnet.com/article/why-raid-6-stops-working-in-2019/ – CaldeiraG May 31 '19 at 11:40
  • Most of your questions are heavily depended on your situation (budget, actual hardware, what happens on those disks and so on). For a general rundown as to why it might be undesirable check @CaldeiraG the question will probably be closed as being opinion based. – Seth May 31 '19 at 12:01
  • @CaldeiraG thanks, this article is quite old (2010) do the statements and math still hold true or did the error rate change – user2693017 Jun 01 '19 at 09:24
  • So I guess for SSDs a Raid-6 is pretty safe? – user2693017 Jun 01 '19 at 09:24

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