Dell's MD3k series SANs only accept Dell Certified Enterprise Drives of the specific models in the support matrix. So, if your drive is the same model, but it doesn't have on the sticker the "Enterprise Class - Certified by Dell" on it, it won't work. There is no way to bypass this. You can look on Ebay or so for appropriate drives if Dell won't sell one or charges too much. Here is an example.
HiGot a MD3200i. A disk reported as failed so I purchased an identical disk (same Product ID ST3600057SS). However the new disk reports now Status IncompatibleCause: UnsupportedMode: IncompatibleI suspect this might be because of the disk firmware: 000B. Newest firmware is ES68. When trying to upgrade firmware I get this message: ERROR DATA Command sent to RAID controller module in slot: 0Return code: Error 249 - The physical disk firmware download operation failed because one or more of the physical disks you selected has a Bypassed or Offline status and is inaccessible. Please make sure the physical disks you selected do not have a status of Bypassed or Offline, and then retry the operation. Operation when error occurred: PROC_startDriveFirmwareDownload How to determine if old firmware is really the cause of incompatibility status?And if so, how to 'activate it' so that it gets a status that allows firmware upgrade? 
Replacing disk - Status: incompatible - Unable to upgrade firmware