Scanned Drawings into Enterprise

Hello,

We have large pile of drawings that we have scanned (thank God for summer students), I am planning on putting some into enterprise for the purpose of scanning content.  Is OCR required on them prior to inserting into the system?  Is there a practical limit to the amount of information that can be put into Enterprise and still have a good (timely) content search?

Thanks

SolidworksSolidworks Pdm enterprise Pdm