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Storage Utilization

I am frequently asked about the utilization of storage, and it seems that when there are more than three people in the room, it can become a highly confusing subject. Depending on the perspective, it can be difficult to agree on exactly what utilization is being measured. While the storage administrators will declare a utilization number, procurement management will profess another, and an outside consulting company might state yet a different utilization number. This all leads to executive management being confused. Why isn't everyone on the same page?

Storage utilization is represented as a percentage of the whole of something. The fundamental issue is that there are many different terms used for the different stages of storage. Basically, the stages of storage and high-level definitions are:

1. Raw the physical disk purchased

2. Configured – RAID is applied

3. Allocated – provisioned to the hosts

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