By default, MinIO writes to disk in synchronous mode for all metadata operations. Set `MINIO_DRIVE_SYNC` environment variable to enable synchronous mode for all data operations as well.
Example:
```sh
export MINIO_DRIVE_SYNC=on
minio server /data
```
### HTTP Trace
HTTP tracing can be enabled by using [`mc admin trace`](https://github.com/minio/mc/blob/master/docs/minio-admin-complete-guide.md#command-trace---display-minio-server-http-trace) command.