This issue was seen on a subset of e6540 systems. Dell released a BIOS update to resolve this behavior on the e6540 in Sept / Oct of 2015. I don't have the exact revision number or the date of the release. Can you check the BIOS and update if needed?
Also, ensure the system has the SATA Operational Mode set to AHCI.
Thanks! I'll do the bios upgrade. I appreciate your help!!
I already had the most current BIOS version and had tried changing numerous bios settings over the past several weeks in an attempt to resolve the matter. Had also tried all recommendations provided by McAfee Tier 3 support.
Here is what fixed this issue. I contacted Dell tech support and provided the same explanation I included here. Their tech said this was an issue that was covered under our warranty so they dispatched someone to replace the motherboard. There were no other indications there was any problem with the motherboard. But that resolved the issue! I've tested it with about 20 "cold" boots now and no more infinite reboot issue.