diff --git a/openpower/package/petitboot/66-add-sg-module.rules b/openpower/package/petitboot/66-add-sg-module.rules
new file mode 100644
index 0000000..ae18d28
--- /dev/null
+++ b/openpower/package/petitboot/66-add-sg-module.rules
@@ -0,0 +1,2 @@
+# load modules to scsi disks, if they aren't in kernel
+SUBSYSTEM=="scsi", ENV{DEVTYPE}=="scsi_device", TEST!="[module/sg]", RUN+="/sbin/modprobe sg"
diff --git a/openpower/package/petitboot/petitboot.mk b/openpower/package/petitboot/petitboot.mk
index 2835be3..ba7276b 100644
--- a/openpower/package/petitboot/petitboot.mk
+++ b/openpower/package/petitboot/petitboot.mk
@@ -61,6 +61,8 @@
 		$(TARGET_DIR)/etc/udev/rules.d/
 	$(INSTALL) -D -m 0755 $(BR2_EXTERNAL_OP_BUILD_PATH)/package/petitboot/65-md-incremental.rules \
 		$(TARGET_DIR)/etc/udev/rules.d/
+	$(INSTALL) -D -m 0755 $(BR2_EXTERNAL)/package/petitboot/66-add-sg-module.rules \
+		$(TARGET_DIR)/etc/udev/rules.d/
 
 	ln -sf /usr/sbin/pb-udhcpc \
 		$(TARGET_DIR)/usr/share/udhcpc/default.script.d/