Haven't we already been through this twice before? If you want to use the full capacity of all three drives together (that is, a total of 6 GB) with e-smith, you need to use RAID 0, and you'll need a hardware RAID controller for that. You don't have a hardware RAID controller, and RAID 0 gives you no fault tolerance. If you wanted fault tolerance, you could set up a RAID 5 array (for a total of 4 GB), but that would again require a hardware RAID controller with e-smith.
OK, you _could_ use the three separate drives and mount them individually, but that would also require custom work, and wouldn't be supported by a standard installation.
If you want to use e-smith's RAID, you might as well remove one of the three drives. e-smith should use the other two, mirrored. That means that you'll only get the capacity of one drive, but if either drive fails, your data is still saved.
As to 4.1.1 vs. 4.1.2, most of the same bugs that have recently appeared in 4.1.2 are also present in 4.1.1--the billion second bug and the telnetd bug for sure, and if 4.1.1 included the webmail at all (I don't remember this), the webmail security hole is in 4.1.1 as well.