You should re-connect the network cable from CM0 and on the switch. Than you can pull the cable on the CM1 and see if the connection fail back to the active CM. If this happens than its save to pull the CM1 to swap the battery. Note: A EQL Group needs some minimum of disk space to work and for me it looks like that there is only little space left. If you have deployed SANHQ i expect mail notification about the very low space.   Regards,Joerg
I have an old equallogic internally running testing - which I don't want to turn off or restart at the moment.  Meaning a replace of battery without turning off the SAN:I have a battery failure, and have a challenge to pick the correct Controller module to pull from SAN, ref Fig 1 and Fig 2 below. Fig 1. There is a battery failure in Secondary Controller Module/Type14 [IMAGE]   It does not specify which is the secondary module from the back of the SAN, ref Fig2 below.  My thinking was that the secondary module would be the one with no activity:  But bottom module shows activity on the ethernet while the top module I connect to via the management port and shows activity on the management port.  FYI I pulled the management cable from the top module - and I could not connect to the SAN. It seems both modules are in use? Pull Top Module or Bottom Module for battery replacement?    Please advice.  Fig2. [IMAGE]
Equallogic PS6110X Controller Module battery failure - which controller to pull 
from SAN?