Firmware is vendor specific for each drive - for example, if we have three different drives that we describe as "X412", one model might need NA03 firmware, another needs NA02, and another might be fine on NA00 - they need not all be the same level unless they are exactly the same drive and manufacturer model.
Ensure the latest firmware is present on the system and the Disk Qualification Package is up to date and options raid.background_disk_fw_update.enable is set to on. Firmware and DQP are available from http://mysupport.netapp.com/NOW/download/tools/diskfw/
Potentially the replacement drive is also faulty - did you receive it from NetApp directly, or through a third party?