After tests and tests ,I finally found a workaround to got Raid working.
1- I re- configured the raid, using raid bios. I used sighly different settings changing write policies , but anything important. 6 disks in raid 5.
2- I reboot on win and mac. Both systems detect new volume. Both show me the dialog to initializate. I decide do it in Windows, with windows disk utlity. Just initializate. Not partitions.
3- I reboot and mac. All OK. Disk utility can see volume
4- Again in windows, I did the partitions. Two partitions in my case. With nfts FS.
5- Rebooting in Mac ... Bingo. Everything seems OK.
Now. On mac, with disk utility, I delete the volume , partitioning it again. So disk utility writes again partition table. I use gpt, of course. Result at next boot: Boot procces stops again at LSI bios loading . No way.
-I discovered I didn't need disconnect HD to acces bios. I need just press ctrl-H before of bios card load process, and keep it pressing. Again, I repeat whole process.
- Again on point 5, I try to avoid make partitions. Just format. But I can't do it. But I get "can't erase (mediakit reports not enough space on device for requested operation)" error.
- I decide do all process in windows. One important thing here. On my prevoius post I explained that mac could't see volume on my second try. I used one utility on windows to make "exotic" partitions and format (I need exfat and ext3). Now I think this utility was the guilty. So I decide be carefull with this kind of utilities. After think about that I decide trust in gparted. I reboot using a live ubuntu , I format one of my partitions in ext3. Always without touch volume structure. Just format. I haven't found a trustly way to format in exfat , so I decide use nfts for the other partition and use paragon nfts in mac.
-Everything is ok. I have my Raid mounted on mac. First test give me similar read/write results than in Win. I have to test it working.
In short: Bios LSI doesn't like how mac disk utility makes table partition and/or structure. I realize it is sighly different than in windows (different first primary partition size ).
My workaround: perform raid in bios card > Initialize and make the partitions just using windows disk utiliy> Use gparted to format partitions if use HFS or exotic FS, always without touch table partition, just to format.
... and I have to express my gratitude to dukzcry. To have my raid working is my fundamental to my hackintosh project. It doesn't make sense without a raid. Using LSI card is important for me because these are the supported card on my workstations, needed to keep compatibilitie with linux too ( I use linux on my workstation too!!) . Use LSI card on mac was my dream. Same raid with win/mac/linux. So thank you , duckzcry, for waste your time ....