# Incremental data replication - To trigger a precheck manually (Optional)

```
$ tiup dmctl:v6.5.1 --master-addr=${HOST_DM_MASTER_IP}:8261 check-task dm-task.yaml
Starting component `dmctl`: /home/ec2-user/.tiup/components/dmctl/v6.5.1/dmctl/dmctl --master-addr=10.90.2.119:8261 check-task dm-task.yaml
{
    "result": true,
    "msg": "pre-check is passed. "
}

```
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To run a data replication task smoothly, `DM` triggers a precheck automatically at the start of the task and returns the check results. `DM` starts the replication only after the precheck is passed. To trigger a precheck manually, run the `check-task` command:

```
$ tiup dmctl:v6.5.1 --master-addr=${HOST_PD1_PRIVATE_IP}:8261 check-task dm-task.yaml
Starting component `dmctl`: /home/ec2-user/.tiup/components/dmctl/v6.5.1/dmctl/dmctl --master-addr=10.90.2.119:8261 check-task dm-task.yaml
{
    "result": true,
    "msg": "pre-check is passed. "
}
```