There was an (successful) attempt to build Lenny distro for LS PRO DUO.
The kernel patches can be found here
They initialize some of the NAS devices, including the Marvell SATA controller.
The precompilled kernel image works fine, the controller is properly
initialized and hard drives are visible.
The original announcement can be found here
Unfortunately I do not have enough knowledge of D-I infrastructure to
build and try a network-console image.
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