There is much confusion concerning the cost of storage. Add to the mix vendors who have an agenda that actually deliberately confuses the issues, and the result is quite a conundrum. What is the cost of storage? The problem is that there are many costs of storage.
The first and simplest cost of storage is that of the cost per megabyte (or cost per whatever measure seems to make sense). Vendors love to provide comparisons for storage mediums on a per-byte basis. Unfortunately, comparing the cost of storage at the bit level is almost meaningless because storage does not exist by itself. In order to be useful, storage requires an entire infrastructure of controllers, communication lines, caching, software and several other incidental attachments including the processor required to use and drive the storage units. In the long run, the infrastructure surrounding the storage is more expensive and important than the storage itself.
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