The following hosts were retasked in bug 1397879 but did not reimage correctly. t-w1064-ix-121.wintest.releng.scl3.mozilla.com t-w1064-ix-122.wintest.releng.scl3.mozilla.com t-w1064-ix-123.wintest.releng.scl3.mozilla.com t-w1064-ix-124.wintest.releng.scl3.mozilla.com t-w1064-ix-125.wintest.releng.scl3.mozilla.com According to markco, when one attempts to PXEboot, one gets back the message: "An operating system is not found"

Looks like these 5 machines have Ethernet plugged into into NIC2 instead of NIC1 and by default the boot ROM is on NIC2. This means it will fail PXE boot because no device with an enabled ROM is in a connected state. See BIOS on machine t-w1064-ix-121 for an example of fix under Advanced ->PCI/PNP->Load Onboard LAN 2 Option Rom or attached image on this bug.

ROM boot option in a fixed state for a machine with NIC 2 plugged instead of NIC1

Done for the other 4 machines.