The HPE USB Key Utility does not support multi-boot setups on a single device. The HP SUM and SPP ISOs contain signed parts to work with the UEFI bootloader. The signed parts do not allow for multi-boot setups on a single device, such as a USB key.

The following sections discuss deployment from HP SUM. For more information on planning an update, see the HP SUM Best Practices Planning and Implementation Guides available on the Hewlett Packard Enterprise website.

More information

http://www.hpe.com/info/hpsum/documentation