diff --git a/mbr/consts.go b/mbr/consts.go
new file mode 100644
index 0000000..93d0efa
--- /dev/null
+++ b/mbr/consts.go
@@ -0,0 +1,30 @@
+package mbr
+
+const (
+	MBRsize = 512
+
+	BootstrapCodeArea1Size = 218
+	BootstrapCodeArea1Offset = 0
+	BootstrapCodeArea2Size = 216
+	BootstrapCodeArea2Offset = 224
+	LegacyBootstrapCodeAreaOffset = 0
+	LegacyBootstrapCodeAreaSize = 446
+
+	DiskTimestampOffset = 218
+	DiskTimestampSize = 6
+	DiskTimeStampSecondsOffset = 221
+	DiskTimeStampSecondsSize = 1
+	DiskTimeStampMinutesOffset = 222
+	DiskTimeStampMinutesSize = 1
+	DiskTimeStampHoursOffset = 223
+	DiskTimeStampHoursSize = 1
+
+	PartitionEntrySize = 16
+	PartitionEntry1Offset = 446
+	PartitionEntry2Offset = 462
+	PartitionEntry3Offset = 478
+	PartitionEntry4Offset = 494
+
+	BootSignatureSize = 2
+	BootSignatureOffset = 510
+)
\ No newline at end of file