Don't think it is possible, you still need some chips of original Blu-ray drive (binding of HW-ID to BD-firmware for SCI-ID).
But you gonna need this if you're going to try (of prove/claim it is [im]possible):
(or Google for "bdd 0013e 01")
Finding the powerlines and ground shouldn't be a problem.
Next would be finding the 2 differential datapairs (if wired, normally found as shielded twisted pair) for SATA.
If you would succeed in hooking up the hardware, in the endresult you will still need a modified Backup/File Manager to add /dev_hdd1 as mountpoint additional to the usual /dev_hdd0 , /dev_bdvd , /dev_ps2disc and /dev_ps1disc
Originally Posted by KillerBug
Most new drives also have a 3.3V input...but you do not need this, and the 3.3V line does not have the amps for this anyway.
For many 3.5inch drives this would work, but if anyone would try to use a 2.5inch drive instead it would not even use the 12V lines (not connected in HDD) and possible will require the 3.3V lines instead (although I currently
don't see 3.3V lines used) as a lowpower mobile device.