Hi Akther In that case, please make sure the server have a continuous power supply to prevent any power trip, just in case there is data being written to your MD at that point of time.  
Hi  I can see this  Battery Degraded warning message in Dell Open Manage against  PERC 6/E Controller. Do we need to change this battery immediately or there is no harm to keep like this? Appreciate any one can explain about it and i want to know this battery contains any configuration or settings saved.  Dell MD1000 Direct Attached storage is connected through this PERC 6/E controller. Thanks 
Dell Power Edge R710 PERC 6/E Controler Battery Degraded