Dell Compellent Series 40 - Manual (Page 14)

6 Enterprise Manager 5.5 Installation and Setup Guide
Special Instructions for Installing on 64-Bit Machines
If you are installing Data Collector or Enterprise Manager Client on a 64-bit machine, follow
these additional instructions:
Note Only AMD64-compatible 64-bit processors, including Intel 64, are supported by
Enterprise Manager. Itanium 64 is not supported.
1 During installation on a 64-bit machine, you may be prompted to install the Java
Runtime Environment two times: once for the 32-bit version and again for the 64-bit
version. Make sure you install the Java Runtime Environment both times you are
prompted to do so. (The 64-bit version requires elements in the 32-bit version.)
2 If you are prompted to reboot the system, perform the reboot. Enterprise Manager
installation will continue after the reboot.