diff --git a/app/database.py b/app/database.py
index bfb2893..477b60a 100644
--- a/app/database.py
+++ b/app/database.py
@@ -87,6 +87,8 @@ _MIGRATIONS = [
     "ALTER TABLE burnin_stages ADD COLUMN bad_blocks INTEGER DEFAULT 0",
     "ALTER TABLE drives ADD COLUMN smart_attrs TEXT",
     "ALTER TABLE smart_tests ADD COLUMN raw_output TEXT",
+    # Stage 8: track last reset time so dashboard burn-in col clears after reset
+    "ALTER TABLE drives ADD COLUMN last_reset_at TEXT",
 ]
 
 
diff --git a/app/routes.py b/app/routes.py
index 8d89f08..ddff766 100644
--- a/app/routes.py
+++ b/app/routes.py
@@ -118,11 +118,17 @@ _DRIVES_QUERY = """
 
 
 async def _fetch_burnin_by_drive(db: aiosqlite.Connection) -> dict[int, dict]:
-    """Return latest burn-in job (any state) keyed by drive_id."""
+    """Return latest burn-in job (any state) keyed by drive_id.
+
+    Jobs created before the drive's last_reset_at are excluded so the
+    dashboard burn-in column clears after a reset while history is preserved.
+    """
     cur = await db.execute("""
         SELECT bj.*
         FROM burnin_jobs bj
+        JOIN drives d ON d.id = bj.drive_id
         WHERE bj.id IN (SELECT MAX(id) FROM burnin_jobs GROUP BY drive_id)
+          AND (d.last_reset_at IS NULL OR bj.created_at > d.last_reset_at)
     """)
     rows = await cur.fetchall()
     return {r["drive_id"]: dict(r) for r in rows}
@@ -733,8 +739,12 @@ async def reset_drive(
            WHERE drive_id=?""",
         (drive_id,),
     )
-    # Clear cached SMART attributes
-    await db.execute("UPDATE drives SET smart_attrs=NULL WHERE id=?", (drive_id,))
+    # Clear SMART attrs cache + stamp reset time (hides prior burn-in from dashboard)
+    now = datetime.now(timezone.utc).isoformat()
+    await db.execute(
+        "UPDATE drives SET smart_attrs=NULL, last_reset_at=? WHERE id=?",
+        (now, drive_id),
+    )
 
     # Audit event
     await db.execute(