diff --git a/metropolis/pkg/scsi/scsi_linux_defs1.go b/metropolis/pkg/scsi/scsi_linux_defs1.go
new file mode 100644
index 0000000..e2e410d
--- /dev/null
+++ b/metropolis/pkg/scsi/scsi_linux_defs1.go
@@ -0,0 +1,16 @@
+//go:build ignore
+
+package scsi
+
+// #include <scsi/sg.h>
+import "C"
+
+const (
+	SG_IO                = C.SG_IO
+	SG_DXFER_NONE        = C.SG_DXFER_NONE
+	SG_DXFER_TO_DEV      = C.SG_DXFER_TO_DEV
+	SG_DXFER_FROM_DEV    = C.SG_DXFER_FROM_DEV
+	SG_DXFER_TO_FROM_DEV = C.SG_DXFER_TO_FROM_DEV
+)
+
+type sgIOHdr C.sg_io_hdr_t