Normally, after the system boots, the devices are configured and then after a reboot the devices are initialized. You can enable the I/O Identity Optimization feature to achieve boot optimization. If it is enabled, it sets the virtual address, initiator, and storage target attributes after the device is reset and before it is initialized, thus eliminating a second BIOS restart. The device configuration and boot operation occur in a single system start and is optimized for boot time performance.
After enabling I/O Identity Optimization feature, export the XML configuration file from iDRAC, modify the required I/O Identity attributes in the XML configuration file, and import the file back to iDRAC.