By PMP, I assume you refer to Port Multipliers. If so, I confirm the Intel® Q67 Platform Controller Hub (PCH) SATA controller on the Intel(R) Desktop Board DQ67SW does not support it; see page 594 of the datasheet for the chipset:
but on page 608 is written:
Incorrect Port Multiplier Enable (IPME) — R/W. When set, and GHC.IE and PxIS.IPMS are set, the PCH will generate an interrupt.
NOTE: FIS based Port Multipliers only supported on SATA ports 4 and 5 by PCH
How comes? Is this an error in the doc?
I confirm one thing is what the chipset supports and another what the board, with the same chipset, supports. In this case, the Intel(R) Desktop Board DQ67SW does not support Port Multipliers.
this is a missing software support for this board isn't it?
Will there be a BIOS update to enable Port Multiplier support for the eSATA ports in the foreseeable future?
In the chipset spec. at some places it seems to have provisions for PMP, like command registers for LED.
However, in the help pages of Intel Rapid Storage console it is clearly written that PMP is not supported.
Probably better if you need PMP to buy a Silicon Image dual port e-sata PCIe controller. (one external one internal).
I am not within Intel but with USB3 giving similar functionality and perf. as e-sata2 + PMP it is not obvious that PMP becomes a priority.