You can try to "re-tag" the array in the Ctrl R bios.  Select  the drives and create the RAID 5, but do not initialize.  Then restart the server and hope it restarts.  Otherwise, you will need to send the drives to a data recovery service, such as OnTrack or DriveSavers to recover the data.  Regards,
I removed the VD on a RAID 5 six disk 2950. I need to recover the data. Can the VD be re-created and the data recovered. No other changes have been made to the machine.
Dell 2950 VD removed