diff --git a/profiles/templates/3.5/6_ac_update_sync/world/grp/sys-fs b/profiles/templates/3.5/6_ac_update_sync/world/grp/sys-fs
index 48280dd6..796fff3e 100644
--- a/profiles/templates/3.5/6_ac_update_sync/world/grp/sys-fs
+++ b/profiles/templates/3.5/6_ac_update_sync/world/grp/sys-fs
@@ -1,5 +1,11 @@
 # Calculate name=world format=world
 
+#?in(os_linux_pkglist, CB3)!=#
+# need for build kernel for servers
+btrfs-progs
+mdadm
+#in#
+
 #?in(os_linux_pkglist, CB3)!=#
 exfatprogs
 #in#