>> The card IBM recommended is only 0,1 and they will not warranty any parts >> which are not from IBM. > > is this machine available with a simple JBOD non-raid 4 channel SATA card? > use linux native software raid 0+1... it probably performs better than > their raid cards anyways. As I am not confident to build and maintain the software raid 0+1, therefore, i decided not to get into that stage. Thanks