I went on holiday, so it had to wait a bit. I noticed that when you add a member to a group, a lot of data is being transfered to the new member. this is done so that all members handle the load they can. The system transfers data online without loss of bandwith. the same system is used when you move a member to another storage pool. so no problems with bandwith there and when the member is moved to a empty storare pool, all data is transfered to the remaining members. When a move is completed the member is empty and can be deleted in a few minutes. in conclusion: no bandwith issues when moving and deleting a member from a group. This can be done in a working production envirement. thx for the help.
I have a group with: 1 ps100 ( yes its very old) 2 ps5000 and now i have 2 new ps6100 with enough space  to replace all of them. I have put 1 ps6100 in the group and now i want to remove 1 ps5000 from the group to make space in the rack for the other ps6100. My question is: can this be done in a life situation? what will be the workload on the switch when i move the old ps 5000 out of the group? Will Vmware have problems connecting to the San or will the datatransfer be throttled?  hope someone can give me some idea. greetings Gertjan 
Network load when removing member