Sorry, but there isn’t a way to merge two groups into one (regardless of the number of members). Provided that at least one member in the group (that you plan to no longer use) has enough space to hold the data that was on both members, you can simply; Delete one member from the group (the remaining member will temporally hold all the data). Then add the removed member to the group you are planning on keeping (this ensures that you have the space to hold the data from the group you are removing). Once added and initialized, then copy the data (using either another disk to hold each volume’s data, or create a iSCSI connection to an empty volume on the production group), to the group you plan on keeping.  Once all the data is copied from the group you plan on no longer using, you can then remove the remaining member and add it to the other group.  This process requires that you reconfigure the member as you add it to the other group (IP, RAID Policy, etc.). If you don’t have enough space for one member to hold the data in the group, you could copy/delete enough of the data off the one group (temporarily) until you have enough space to remove one member, then just follow the process outlined above until all the volumes are copied (Or you can use a backup and restore the data). Adding a member to an existing group does not disrupt the current group operations.  However, a small performance hit would be expected, so plan on doing any work during low IO.  A best practice to limit this performance hit, is to add the new member to a temporary pool (you create this in the production group), when you add the member to the group, select the temp pool, and then setup the raid policy.  Once the array has finished initializing, you then add it to the production pool. -joe
Greetings, Here is the scenario. I currently have (2) PS5000 groups consisting of 2 members each. One group has several critical volumes and the other has nothing of note on it. We have just recieved (1) new PS6500. My goal is to merge the (2) groups or (4) PS5000s for a combined approx 18TB of storage without disrupting the existing volumes. I'll then prepare the PS6500 to act as an offsite replication partner for Disaster Recovery purposes. Question: Will I be able to merge one PS5000 group into the other as a single pool without disrupting the existing volumes? And if not...might I consider setting up the PS6500...make it a rep partner...rep the critical volumes to it...initialize the new (4) member group...then replicate back? Long way around it seems. I welcome your thoughts.
Merging PS5000 Groups