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    • https://kb.netapp.com/on-prem/E-Series/SANtricity-OS-KBs/E_Series_upgrade_error_Cannot_Perform_Upgrade_Operation
      Applies to NetAppp E-Series NetApp SANtricity OS Issue Error message after uploading the controller OS software and NVSRAM in Upgrade Center:Cannot Perform Upgrade Operation - An unkown issue occurred...Applies to NetAppp E-Series NetApp SANtricity OS Issue Error message after uploading the controller OS software and NVSRAM in Upgrade Center:Cannot Perform Upgrade Operation - An unkown issue occurred while performing the upgrade operation. Please try again The upgrade fails no matter how many times it is attempted even after a restart of the controller