There is no driver. The PERC 4's are incompatible with 2012 R2 using previous drivers and no new drivers have been developed, either by Dell or by LSI. 2012 is as high as you can go. I'm not saying it is impossible, just that several people have been through this all before without any luck.
Hi All Pulling what's left of my hair out... I am trying to upgrade a Dell PowerEdge 1850 from 2012 to 2012 R2 but get the error  Can anyone send a link to this please? The dell website is useless when searching for drivers! Hopefully someone out there has found it?  Thanks
Upgrading from 2012 to 2012 RD