Hello,   Are you planning on moving to 10GbE in the future?  Yes, specifically the 6210 series controller can run at GbE.  It's the only EQL 10GbE array that can by the way.   The 6210 will only run EQL FW v7.0 or greater.  So the existing member will need to be upgraded to current version of 7.0.x.    If you don't plan on moving to 10GbE, you might want to consider getting another 6100 system..  Only downside to 6210 running at GbE is there are only two ports total vs. the 6100 having four GbE ports.   Since you are currently using dedicated mgmt port, the new unit will also need be configured that way.    What kind of switches are you using?   Make sure the connection between the switches is sufficient to handle the additional I/O load.   So if they are not stacked switches, you may need to increase the trunk ports.  It's a common problem we see,  add another member and performance goes down because of lack on Inter-Switch connectivity.   Regards, 
Hi, At the moment I'm in the final stages of shopping for an extra EqualLogic to add extra space to our current (and only one) PS6100XV (24x 600 GB 3,5" 15k disks raid-10). Altought we could have added an E type unit I decided to add another SAS unit first as we do quite some writes (50/50 averaging at 2300 IOps total), the third unit will be a SATA if performance wise allowed. The new unit is going to be a PS6210X (24x 600 GB 2,5" 10k disks) which comes with 2x 10Gbit dual port controllers were our current unit has 2x 1Gbit quad port controllers (green ones). As I've told it's no problem to be running the 10 Gbit modules on 1 Gbit and to put the into a group together (dedicated management network btw). After making sure our current unit has recent firmware which is >= to the new units firmware it should be pretty straight forward or are there any caveats I might be missing here?
Shopping for EQL #2 besides the current PS6100XV