i like to thank u for the answer
here is the system configuration
1. server with 250GB sata , no raid controller, i have build inside a VL size of 10GB and make it a target (lun)
2/ server with 80GB sata, no raid controller, also made 10GB VL and make it a lun
3/ using the iscsi initator, i have connected the first server to the second and now i can see in the S/W raid 2 drives!
4,. i use those drive, ( one from my server, and second from the other connection ) to create a raid 1 between them.
5, a new raid 1 is created name md0
6.MD0 is now publish under one drive and bean target iscsi as half 5.45GB
7/i manage to copy data into the iscsi from linux server and work with that, but if one of the servers fail i can access the system but i dont know if the data is there or is there any mirror in the system
also
8. i think i need more info how to create a mirror between 2 DSS lite system,

thanks
amir