Dell :: [E6500][esata][RAID Port Multiplier] Raid 1 Enclosure Not Regnosized Using The Esata Port

Here's my story and, let's say, my analysis:

I bought a generic 2 HD sata2 RAID1 enclosure based on the chipset Silicon Image SteelVine 5744. It can be used in USB or eSATA2. This embedded chipset (named SiL5744) is known (understand "claimed") to auto-handle Sata I/II and host sata2 controllers that not support the port multiplier feature. The HD are two Samsung F1 1To. There's no jumper to rollback to SATA 1.5Go on them, you can only do it by flashing the HD's bios, however we don't need to do it as I wrote just before, the SiL5744 supports SATA 3Go natively.

The enclosure works pretty well with USB, but *not* in eSATA : the E6500 freezes/hangs just after the POST step (a potential driver issue with the installed vista 64bits is not the reason then). As soon has I disconnect the eSATA cable, the system recovers and continues as normal.

What I've tried/done so far :

Both E6500's BIOS SATA mode AHCI and IRRT mode were tested,
Intel Matrix driver and software was updated to the latest 8.7.0.1007 version (AHCI and IRRT),
The SiL5744 chip was upgraded to its latest firmware as well (in case of...)

In order to verify the esata cable, the HDs and the enclosure itself, I succeed to :

- Use the enclosure's RAID1 feature when using the USB connection, I could partition,format, and read/write on the logical volume
- directly connect *one* HD (Samsung F1 1To) to the E6500's esata port -(I have a sata2esata cable), Vista installed it and I was able to use it as normal, even the hotswap feature seemed to work fine (I unkindly removed it). I could so test both HD individually this way... On the enclosure hardware side, everything looks fine then.

An IMPORTANT thing : The E6500's ICH8/9-M sata host controller seems to support the Port Multiplier feature *ONLY* on sata port 0 -as a bubble message from the Intel Matrix soft sometimes shows up-, but this is exactly where the internal HD is plugged on the motherboard I found nowhere you can change the internal sata port ID (switch,bios,ect...). I think this is the key of the problem that seems to be a dumb port conflict, because the esata port is in fact the port sata 4 (the DVDRW drive is sata 1, dock's esata is 5 for instance). If somebody knows how to swap the sata port ID, I think I won't be toasted !