diff --git a/features.in/isomd5sum/README b/features.in/isomd5sum/README
index ea61a5bd..39420d01 100644
--- a/features.in/isomd5sum/README
+++ b/features.in/isomd5sum/README
@@ -1,3 +1,4 @@
-Эта фича конфигурирует внедрение контрольной суммы в образ
-инсталятора после его сборки с целью проверки целостности
-на ранней стадии установки.
+Эта фича конфигурировала экспериментальную проверку целостности носителя;
+в настоящее время является устаревшей, см. features.in/mediacheck
+
+# TODO: DROP
diff --git a/features.in/isomd5sum/config.mk b/features.in/isomd5sum/config.mk
index dc33899c..ecc2e2e8 100644
--- a/features.in/isomd5sum/config.mk
+++ b/features.in/isomd5sum/config.mk
@@ -1,3 +1,2 @@
-use/isomd5sum:
-	@$(call add_feature)
-	@$(call add,POSTPROCESS_TARGETS,90isomd5sum)
+use/isomd5sum: use/mediacheck
+	@$(warning deprecated, see mediacheck feature)
diff --git a/features.in/mediacheck/README b/features.in/mediacheck/README
new file mode 100644
index 00000000..f4d67136
--- /dev/null
+++ b/features.in/mediacheck/README
@@ -0,0 +1,6 @@
+Эта фича конфигурирует внедрение контрольной суммы в образ
+инсталятора после его сборки с целью проверки целостности
+на ранней стадии установки.
+
+NB: прототип, для реального использования надо сделать
+микрообраз на основе stage2.
diff --git a/features.in/mediacheck/config.mk b/features.in/mediacheck/config.mk
new file mode 100644
index 00000000..50834920
--- /dev/null
+++ b/features.in/mediacheck/config.mk
@@ -0,0 +1,3 @@
+use/mediacheck: use/stage2 sub/stage2@mediacheck use/syslinux/mediacheck.cfg
+	@$(call add_feature)
+	@$(call add,POSTPROCESS_TARGETS,90mediacheck)
diff --git a/features.in/isomd5sum/lib/89-isomd5sum.mk b/features.in/mediacheck/lib/89-mediacheck.mk
similarity index 74%
rename from features.in/isomd5sum/lib/89-isomd5sum.mk
rename to features.in/mediacheck/lib/89-mediacheck.mk
index 3baecc5a..9bd12547 100644
--- a/features.in/isomd5sum/lib/89-isomd5sum.mk
+++ b/features.in/mediacheck/lib/89-mediacheck.mk
@@ -1,4 +1,4 @@
 CHROOT_PACKAGES += isomd5sum
 
-postprocess-90isomd5sum:
+postprocess-90mediacheck:
 	@implantisomd5 "$(IMAGEDIR)/$(IMAGE_OUTFILE)"
diff --git a/features.in/mediacheck/mediacheck/image-scripts.d/98-init-mediacheck b/features.in/mediacheck/mediacheck/image-scripts.d/98-init-mediacheck
new file mode 100755
index 00000000..06d576ed
--- /dev/null
+++ b/features.in/mediacheck/mediacheck/image-scripts.d/98-init-mediacheck
@@ -0,0 +1,3 @@
+#!/bin/sh
+mv -f -- /etc/inittab.mediacheck /etc/inittab
+:>/etc/rc.d/rc
diff --git a/features.in/mediacheck/mediacheck/image-scripts.d/99-cleanup-all b/features.in/mediacheck/mediacheck/image-scripts.d/99-cleanup-all
new file mode 100755
index 00000000..bfaab3b4
--- /dev/null
+++ b/features.in/mediacheck/mediacheck/image-scripts.d/99-cleanup-all
@@ -0,0 +1,8 @@
+#!/bin/sh
+# everything needed should have been done within initrd when this boots
+
+rpm -e --nodeps apt libapt rpm librpmbuild librpm 2>/dev/null ||:
+rm -rf /var/lib/apt /var/cache/apt /var/lib/rpm
+rm -rf /lib/modules
+rm -rf /usr/share
+rm -rf /usr/lib*/{locale,perl*,python*}
diff --git a/features.in/mediacheck/mediacheck/stage2cfg.mk b/features.in/mediacheck/mediacheck/stage2cfg.mk
new file mode 100644
index 00000000..4a80e90a
--- /dev/null
+++ b/features.in/mediacheck/mediacheck/stage2cfg.mk
@@ -0,0 +1,8 @@
+# stage2 mod: mediacheck single-purpose "live" image
+
+IMAGE_PACKAGES = startup-mediacheck
+
+MKI_PACK_RESULTS = squash:mediacheck
+
+debug::
+	@echo "** mediacheck: IMAGE_PACKAGES: $(IMAGE_PACKAGES)"