If the link above doesn't work, you can go to ftp.dell.com/secure then sysman folder, then find file name OM_6.5.0_SMTD_A01.iso.002. or try: [URL]  
Tryig to upgrade PE 840 server running Server 2003 R2 Standard to Server 2008 R2. (My current) Dell Open Manage for PE 840 does not include support for Server 2008.  When I try to boot/run ISO from DVD, message says no hard drives found. Any suggestions to update the hardware RAID controller to support this install?
Cannot install server 2008 R2 on PowerEdge 840 with Perc 5i RAID controller