2018-01-13T19:45:01.217+0900 I CONTROL  [initandlisten] MongoDB starting : pid=8101 port=27017 dbpath=/data/db 64-bit host=parkjoonyoungui-MacBook-Pro.local
2018-01-13T19:45:01.218+0900 I CONTROL  [initandlisten] db version v3.6.1
2018-01-13T19:45:01.218+0900 I CONTROL  [initandlisten] git version: 025d4f4fe61efd1fb6f0005be20cb45a004093d1
2018-01-13T19:45:01.218+0900 I CONTROL  [initandlisten] OpenSSL version: OpenSSL 1.0.2n  7 Dec 2017
2018-01-13T19:45:01.218+0900 I CONTROL  [initandlisten] allocator: system
2018-01-13T19:45:01.218+0900 I CONTROL  [initandlisten] modules: none
2018-01-13T19:45:01.218+0900 I CONTROL  [initandlisten] build environment:
2018-01-13T19:45:01.218+0900 I CONTROL  [initandlisten]     distarch: x86_64
2018-01-13T19:45:01.218+0900 I CONTROL  [initandlisten]     target_arch: x86_64
2018-01-13T19:45:01.218+0900 I CONTROL  [initandlisten] options: {}
2018-01-13T19:45:01.220+0900 I STORAGE  [initandlisten] exception in initAndListen: IllegalOperation: Attempted to create a lock file on a read-only directory: /data/db, terminating
2018-01-13T19:45:01.220+0900 I CONTROL  [initandlisten] now exiting
2018-01-13T19:45:01.220+0900 I CONTROL  [initandlisten] shutting down with code:100


why this ????????????????????

I can't solve it......