Index: stand/efi/libefi/efipart.c
===================================================================
--- stand/efi/libefi/efipart.c
+++ stand/efi/libefi/efipart.c
@@ -63,6 +63,9 @@
 #define	PNP0700	0x700
 #define	PNP0701	0x701
 
+/* iPXE media signature */
+#define	IPXE_MEDIA_ID	0x69505845U
+
 struct devsw efipart_fddev = {
 	.dv_name = "fd",
 	.dv_type = DEVT_FD,
@@ -255,6 +258,15 @@
 		/* USB or SATA cd without the media. */
 		if (blkio->Media->RemovableMedia &&
 		    !blkio->Media->MediaPresent) {
+			return (false);
+		}
+
+		/*
+		 * iPXE stub Block IO protocol. Test for "iPXE" in MediaID
+		 * and BlockSize.
+		 */
+		if (blkio->Media->MediaId == IPXE_MEDIA_ID &&
+		    blkio->Media->BlockSize == 1) {
 			return (false);
 		}
 	}