i was in a similar situation a while back, EMC installed new DAE with 450 FC drives that were not supported by the flare version. They did the regular flare upgrade and all was well, did not have to disconnect anything, reset anything.
with the new DAE already phisically installed in "failed" status, to recognize the 450fc drive i need to upgrade to flare 3.26.  but my questions are am i able to upgrade flare, remotely  1. with the error in place, ? 2. with the new DAE phisically installed ? 3. without doing total shutdown, ( just the flare update process needs reboots SP, one by one.) ? 4. does the final steps of the upgrade going to reset the bus of the failed DAE, a restore it to normal status? 5. without total shutdown only SPs reboot;  are all new 450fc disks going to be recognized? 6. do i have to disconnect phisically some cables of the bus before upgrade?   thank.  mc
cx3 with flare 3.24 has new full DAE with 450fc disks but are not recognized - 
need go to 3.26