When you originally posted you wanted to mirror the san, and replicate to another DR server therefore I suggested the software mirroring with a replication as the solution for you. (Please remeber you can not replicate a volume on an open-e server to more than one open-e server.)

The block level you talk about is replication and does not have auto failover yet so manual intervention would be needed if the primary open-e server failed, where as the mirroring through the OS allows a open-e server to fail without any disruption to the users.

In both of the situations the dynamic / basic disks would still be an issue if you are using a software isci initiator as we found that on occasions when rebooting the application server the disks would appear as offline and we would have to go into disk manager and re-activate them. We did not loose any data but it could be a pain. To resolve this issue we found that using a qlogic isci hba worked perfectly and also improved performance.