diff --git a/migrations/versions/669065fb2d20_flag_bloquage_calcul_moyennes.py b/migrations/versions/669065fb2d20_flag_bloquage_calcul_moyennes.py
new file mode 100644
index 00000000..9479c828
--- /dev/null
+++ b/migrations/versions/669065fb2d20_flag_bloquage_calcul_moyennes.py
@@ -0,0 +1,28 @@
+"""Flag bloquage calcul moyennes
+
+Revision ID: 669065fb2d20
+Revises: a217bf588f4c
+Create Date: 2021-09-16 22:04:11.624632
+
+"""
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = '669065fb2d20'
+down_revision = 'a217bf588f4c'
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.add_column('notes_formsemestre', sa.Column('block_moyennes', sa.Boolean(), server_default='false', nullable=False))
+    # ### end Alembic commands ###
+
+
+def downgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_column('notes_formsemestre', 'block_moyennes')
+    # ### end Alembic commands ###
diff --git a/tools/migrate_scodoc7_archives.py b/tools/migrate_scodoc7_archives.py
new file mode 100644
index 00000000..55acd842
--- /dev/null
+++ b/tools/migrate_scodoc7_archives.py
@@ -0,0 +1,72 @@
+# -*- mode: python -*-
+# -*- coding: utf-8 -*-
+
+import glob
+import os
+import shutil
+
+from app.models import Departement
+from app.models.formsemestre import FormSemestre
+from app.models.etudiants import Identite
+
+
+def migrate_scodoc7_dept_archive(dept_name=""):
+    if dept_name:
+        depts = Departement.query.filter_by(acronym=dept_name)
+    else:
+        depts = Departement.query
+    for dept in depts:
+        print(f"Migrating {dept.acronym} archives...")
+        # SemsArchiver
+        #   /opt/scodoc-data/archives/<dept>/<scodoc7id> -> formsemestre_id
+        migrate_sem_archives(dept)
+
+        # EtudsArchiver:
+        migrate_docetuds(dept)
+
+        # ApoCSVArchiver:
+        #   /opt/scodoc-data/archives/apo_csv/<dept>/ ne bouge pas
+
+
+def migrate_sem_archives(dept):
+    "/opt/scodoc-data/archives/<dept>/<scodoc7id> -> formsemestre_id"
+    n = 0
+    n_moves = 0
+    for sem in FormSemestre.query.filter_by(dept_id=dept.id):
+        n += 1
+        arch_dir7 = f"/opt/scodoc-data/archives/{dept.acronym}/{sem.scodoc7_id}"
+        arch_dir9 = f"/opt/scodoc-data/archives/{dept.acronym}/{sem.id}"
+        if os.path.exists(arch_dir7):
+            n_moves += 1
+            if not os.path.exists(arch_dir9):
+                # print(f"renaming {arch_dir7} to {arch_dir9}")
+                shutil.move(arch_dir7, arch_dir9)
+            else:
+                # print(f"merging {arch_dir7} with {arch_dir9}")
+                for arch in glob.glob(f"{arch_dir7}/*"):
+                    # print(f"\tmoving {arch}")
+                    shutil.move(arch, arch_dir9)
+    # print(f"moved {n_moves}/{n} sems")
+
+
+def migrate_docetuds(dept):
+    "/opt/scodoc-data/archives/docetuds/<dept>/<scodoc7_id>/ -> etudid"
+    n = 0
+    n_moves = 0
+    for etud in Identite.query.filter_by(dept_id=dept.id):
+        n += 1
+        arch_dir7 = (
+            f"/opt/scodoc-data/archives/docetuds/{dept.acronym}/{etud.scodoc7_id}"
+        )
+        arch_dir9 = f"/opt/scodoc-data/archives/docetuds/{dept.acronym}/{etud.id}"
+        if os.path.exists(arch_dir7):
+            n_moves += 1
+            if not os.path.exists(arch_dir9):
+                # print(f"renaming {arch_dir7} to {arch_dir9}")
+                shutil.move(arch_dir7, arch_dir9)
+            else:
+                # print(f"merging {arch_dir7} with {arch_dir9}")
+                for arch in glob.glob(f"{arch_dir7}/*"):
+                    # print(f"\tmoving {arch}")
+                    shutil.move(arch, arch_dir9)
+    # print(f"moved {n_moves}/{n} etuds")