We understand you have a question about the https://ark.intel.com/products/65714/Intel-Core-i7-3517U-Processor-4M-Cache-up-to-3_00-GHz Intel® Core™ i7-3517U Processor and if it supports SATA port multiplier. We would like to get you in touch with our /community/tech/processors Processors support site, they will be able to help you with your request.
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No, unfortunately it is not supported; these chips are not validated for port multipliers. If you have for example a laptop with this processor and you try to connect it to a SATA port multiplier through eSATA connectors on the laptop, the eSATA are not "PM-aware", and thus will only see the first drive in the port multiplier enclosure.