Hello,   I would upgrade the existing units to the latest 7.1.x.   Then when the 6210 comes in, put it in its own pool and upgrade it as well.  Since it won't come with the latest firmware.   Long term you'll need to remove the PS5000's from that group.   Since mixing supported and EOL EQL storage products in the same group isn't supported.  Once you have it all moved around,  you can create a new group with the PS5000's if you really want to keep using them.   Regards,   Don 
We have a group named EQLBackup that provides space for backup and replication. There are two pools in the group. The firmware version on each of the members in both pools is V7.1.4. We are not storing data on pool M but we have continued to leave the members running. We are looking at purchasing a PS6210 and adding it to pool M so the PS6500 could be removed from the group and be repurposed in a primary storage group. That would reduce the raw space available in pool C from 144 TB to 96 TB. The ultimate plan is to move 2 PS6000s from a primary storage group into pool M to restore some of the lost space but during the transition time I would be very low on space in the pool. I would like to use PS5000s to temporarily provide space for pool M until I am able to add the PS6000s to the pool. A concern I have is the firmware version difference between the PS5000s and the PS6210. I expect the PS6210 would have a newer version than V7.1.4. Could I upgrade the PS5000 firmware to the latest 7.1.X version and, if necessary, downgrade the PS6210 firmware to the same version? Are there any issues I should expect from running a PS6210 in the same group or same pool with a couple PS5000s?
Firmware Version