Hi Everyone,
Spoke to an IBM Engineer on the weekend and he said that in order to change the battery, i need to bring the system down. He also advised me to do a battery test using the Management console, the battery automaticaly discharges every 13 weeks, to prolong battery length, and so as the system can test how long it takes to charge the battery to see if it old and dying or if it is still fine. My test came out fine and the battery was still optimum. I have reset the battery age in the Console so as to remove the Alert, and i will Wait for a Maintenence window to replace the battery as is is not urgent.
If anyone would like some more reading on this system these documents were quite helpfull:
Redbook for DS3400
http://www.redbooks.ibm.com/redbooks/SG247065/wwhelp/wwhimpl/java/html/wwhelp.htm Installation, User's, and Maintenance Guide - IBM System Storage DS3400
http://www-947.ibm.com/systems/support/supportsite.wss/docdisplay?lndocid=MIGR-5069916&brandind=5000028 Battery information:
http://www-947.ibm.com/systems/support/supportsite.wss/docdisplay?lndocid=MIGR-5079213&brandind=5000008