No downtime is needed. We do it on our vSphere 300 VM production cluster. Regards, Joerg
Hi Team, i have Two Equallogic running in Same group and in Single default storage Pool. Old Eql is having RAID 5 and Another newer one is RAID 6. Both are having 12 drives of 600GB. Last week we club both EQL in same group. Every thing went fine . Current Firmware is 6.0.9  on both eql. We add group in SAN HQ.  Now SAN HQ is showing constant alert of Disk firmware is out of date for OLD EQL. Please let me know what are best the practice to follow before any firmware up gradation of EQL disk. do we need complete down time.
Best practices to follow before Equallogic Disk firmware Upgradation