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## Data Recovery

Used to fix issues in data, such as data in sequential space not being arranged in chronological order.

### START REPAIR DATA

Start a repair task to scan all files created before current time.
The repair task will scan all tsfiles and repair some bad files.

```sql
IoTDB> START REPAIR DATA
IoTDB> START REPAIR DATA ON LOCAL
IoTDB> START REPAIR DATA ON CLUSTER
```

### STOP REPAIR DATA

Stop the running repair task. To restart the stopped task.
If there is a stopped repair task, it can be restart and recover the repair progress by executing SQL `START REPAIR DATA`.

```sql
IoTDB> STOP REPAIR DATA
IoTDB> STOP REPAIR DATA ON LOCAL
IoTDB> STOP REPAIR DATA ON CLUSTER
```