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Unity all flash over-provisioning

We have a Unity 450 all-flash array, which we are running as block-only. The total usable capacity is 18TB, provisioned as all thin LUNs. We are over-provisioned by about 4TB currently. We are not planning for a lot of growth. Should we purchase additional flash drives, and if so, how many additional? Thank you for your assistance.

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Re: Unity all flash over-provisioning

Over-provisioned does not mean out-of-space, soh, depends how many data from the actual storage area are you effectively allocating from these 18TB. I would advise you to monitor the growth of this actual area before ordering new SSD disks, I would recommend you to order new SSD only when your effectively allocate space is above 80%.
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