DELL vSphere Hypervisor 5.1

ESXi 5.1 Recovery Image Build# 799733 (A00) This ISO image should be used only to recover/reinstall the ESXi image to SD Card/USB Key on Dell Platforms.

http://www.dell.com/support/drivers/en/en/rc1077983/DriverDetails/Product/poweredge-r620?driverId=XWYR5&osCode=XI51&fileId=3005015335