diff --git a/sdk_container/src/third_party/coreos-overlay/sys-fs/mdadm/files/mdadm.service b/sdk_container/src/third_party/coreos-overlay/sys-fs/mdadm/files/mdadm.service
new file mode 100644
index 0000000000..182c97310b
--- /dev/null
+++ b/sdk_container/src/third_party/coreos-overlay/sys-fs/mdadm/files/mdadm.service
@@ -0,0 +1,6 @@
+[Unit]
+Description=Initiates a check run of an MD array's redundancy information.
+
+[Service]
+Type=oneshot
+ExecStart=/usr/sbin/checkarray --cron --all --idle --quiet
diff --git a/sdk_container/src/third_party/coreos-overlay/sys-fs/mdadm/files/mdadm.timer b/sdk_container/src/third_party/coreos-overlay/sys-fs/mdadm/files/mdadm.timer
new file mode 100644
index 0000000000..ad1a52d828
--- /dev/null
+++ b/sdk_container/src/third_party/coreos-overlay/sys-fs/mdadm/files/mdadm.timer
@@ -0,0 +1,9 @@
+[Unit]
+Description=Weekly check for MD array's redundancy information.
+
+[Install]
+WantedBy=timers.target
+
+[Timer]
+OnCalendar=weekly
+Persistent=true
diff --git a/sdk_container/src/third_party/coreos-overlay/sys-fs/mdadm/files/mdadm.weekly b/sdk_container/src/third_party/coreos-overlay/sys-fs/mdadm/files/mdadm.weekly
deleted file mode 100644
index e2b35b550f..0000000000
--- a/sdk_container/src/third_party/coreos-overlay/sys-fs/mdadm/files/mdadm.weekly
+++ /dev/null
@@ -1,5 +0,0 @@
-#!/bin/sh
-# This requires that AUTOCHECK is true in /etc/default/mdadm
-if [ -x /usr/sbin/checkarray ] && [ $(date +\%d) -le 7 ]; then
-	/usr/sbin/checkarray --cron --all --idle --quiet
-fi
diff --git a/sdk_container/src/third_party/coreos-overlay/sys-fs/mdadm/mdadm-4.2-r1.ebuild b/sdk_container/src/third_party/coreos-overlay/sys-fs/mdadm/mdadm-4.2-r1.ebuild
index 5709e2a00b..cc41f29d25 100644
--- a/sdk_container/src/third_party/coreos-overlay/sys-fs/mdadm/mdadm-4.2-r1.ebuild
+++ b/sdk_container/src/third_party/coreos-overlay/sys-fs/mdadm/mdadm-4.2-r1.ebuild
@@ -96,8 +96,10 @@ src_install() {
 	insinto /etc/default
 	newins "${FILESDIR}"/etc-default-mdadm mdadm
 
-	exeinto /etc/cron.weekly
-	newexe "${FILESDIR}"/mdadm.weekly mdadm
+	systemd_dounit "${FILESDIR}"/mdadm.service
+	systemd_dounit "${FILESDIR}"/mdadm.timer
+
+	systemd_enable_service timers.target mdadm.timer
 }
 
 pkg_postinst() {