FTP 110 Restart Marker Reply vs 550 File Unavailable
FTP 110 (Restart Marker Reply) is a 1xx Positive Preliminary response, while 550 (File Unavailable) is a 5xx Permanent Negative response. 110 indicates that the server is sending a restart marker reply. The text is exact and not left to interpretation. This marker is used to indicate the point at which a file transfer should be restarted. In contrast, 550 means that requested action not taken. File unavailable — the file does not exist, the path is wrong, or you do not have permission to access it.
설명
The server is sending a restart marker reply. The text is exact and not left to interpretation. This marker is used to indicate the point at which a file transfer should be restarted.
이 코드를 보게 되는 경우
During a resumed file transfer when the server confirms the restart position in the data stream.
해결 방법
No fix needed — this is a normal response during transfer recovery. If restarts keep failing, verify the marker format matches what your client expects.
설명
Requested action not taken. File unavailable — the file does not exist, the path is wrong, or you do not have permission to access it.
이 코드를 보게 되는 경우
When you try to download, delete, or navigate to a file or directory that does not exist or is restricted by server permissions.
해결 방법
Verify the file path and name are correct (FTP paths are case-sensitive on most servers). Check your user permissions with the server administrator.
주요 차이점
110 is a 1xx Positive Preliminary response, while 550 is a 5xx Permanent Negative response.
FTP 110: The server is sending a restart marker reply. The text is exact and not left to interpretation. This marker is used to indicate the point at which a file transfer should be restarted.
FTP 550: Requested action not taken. File unavailable — the file does not exist, the path is wrong, or you do not have permission to access it.
You encounter 110 when during a resumed file transfer when the server confirms the restart position in the data stream.
You encounter 550 when when you try to download, delete, or navigate to a file or directory that does not exist or is restricted by server permissions.
언제 어떤 것을 사용할지
For 110 (Restart Marker Reply): No fix needed — this is a normal response during transfer recovery. If restarts keep failing, verify the marker format matches what your client expects. For 550 (File Unavailable): Verify the file path and name are correct (FTP paths are case-sensitive on most servers). Check your user permissions with the server administrator.