1. PC6224 are not the best iSCSI switches on this planet.Yes we have use them too. 2. The 10G Module for PC6224 are made for uplinks to other switches and not for connecting Server/Storage. I dont expect they come with buffers and so..... Yes we have use them to connect ESX Hosts to it... but it was only some DR setup and not a real life production environment. 3. A EQL ist an Active/Standby controller model which means the Standby CM (Controller Module) offer Cache/CPU but no NetworkIO as long as it acts as the Standby.  (We leave the feature called Vertical Portfailover away at this point) If you use 2 phys. Switchtes you need an ISL between them or use the Stacking feature* for creating one logical switch. A Server is never connected directly to a EQL CM but always to one ore more switches. With the ISL in place any server can reach ETH0 and ETH1 from the active CM. * The PC6224 offer 2 slots on the back and in slot1 you can insert a Stacking Module. The 2nd. slot than can takes your 10G Module. Regards,Joerg 
i have two servers R520 connected to two switches power connect 6224 connected to PS4200 storage and another replica storage connected to the main storage lake in the figure belwo Figure 1. Cabling an iSCSI SAN-Attached Cluster to a Dell EqualLogic PS4000 Storage Array  [IMAGE]  i am using the one 10G link from each server connected to the 10G ports on switch. also 10 G links from switch1 to module 0 and switch2 to module 1. and the other links from servers to switches and from switches to storage is 1G? i faced problems with this scenario that server two cannot see the storage because its connected to module 1 (passive). what i am going to do is connecting the 10G links from both switches to module 0 (active) and the 1 g links from switch to module 1 (passive). correct me if im wrong and any suggestion for this connection since its limited to two 10G modules on each switch. one for the server and the other for storage controller.????????   
hi all