diff --git a/initrd/etc/functions b/initrd/etc/functions
index 94f77d3e2..d9969bc9a 100755
--- a/initrd/etc/functions
+++ b/initrd/etc/functions
@@ -697,8 +697,17 @@ mount_possible_boot_device() {
 		return 1
 	fi
 
-	TRACE "Try mounting $BOOT_DEV as /boot"
-	if mount -o ro "$BOOT_DEV" /boot >/dev/null 2>&1; then
+	# Get the size of BOOT_DEV in 512-byte sectors
+	sectors=$(blockdev --getsz "$BOOT_DEV")
+
+	# Check if the partition is small (less than 2MB, which is 4096 sectors)
+	if [ "$sectors" -lt 4096 ]; then
+		TRACE_FUNC
+		DEBUG "Partition $BOOT_DEV is very small, likely BIOS boot. Skipping mount."
+		return 1
+	TRACE_FUNC
+	DEBUG "Try mounting $BOOT_DEV as /boot"
+	elif mount -o ro "$BOOT_DEV" /boot >/dev/null 2>&1; then
 		if ls -d /boot/grub* >/dev/null 2>&1; then
 			# This device is a reasonable boot device
 			return 0