From the word on the Ethereum streets, we knew that an archive node would probably require a couple hundred gigabytes of storage and should be on SSDs and not on spinning rust.
Isn't the latest state (and perhaps the block headers) the only part that needs to be on SSD? The rest of the blockchain and archive are just history and aren't accessed anymore for processing new blocks and transactions. That would reduce the requirement for the SSD to around 10GB. And the rest can be stored on a regular HDD.
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