A corrupt ESXi 5.x installation file supplied by a vendor
A vendor-provided USB drive or CD/DVD media that is faulty
The boot device, such as a USB Flash Drive or SD Flash Card, that is being installed on is corrupt or faulty
Resolution
To resolve this issue, confirm that your hardware is supported and then contact the vendor for replacement media or download the most recent ESXi 5.x revision from the Broadcom Download Center.