FTP 110 Restart Marker Reply vs 504 Parameter Not Implemented
FTP 110 (Restart Marker Reply) is a 1xx Positive Preliminary response, while 504 (Parameter Not Implemented) 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, 504 means that command not implemented for that parameter. The command is supported but not with the specific parameter value provided.
Descripción
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.
Cuándo lo verás
During a resumed file transfer when the server confirms the restart position in the data stream.
Cómo solucionarlo
No fix needed — this is a normal response during transfer recovery. If restarts keep failing, verify the marker format matches what your client expects.
Descripción
Command not implemented for that parameter. The command is supported but not with the specific parameter value provided.
Cuándo lo verás
When you use an unsupported transfer type or mode, such as TYPE E (EBCDIC) on a server that only supports ASCII and binary.
Cómo solucionarlo
Use a supported parameter value. Check the server documentation or use FEAT to see which parameter options are available.
Diferencias clave
110 is a 1xx Positive Preliminary response, while 504 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 504: Command not implemented for that parameter. The command is supported but not with the specific parameter value provided.
You encounter 110 when during a resumed file transfer when the server confirms the restart position in the data stream.
You encounter 504 when when you use an unsupported transfer type or mode, such as TYPE E (EBCDIC) on a server that only supports ASCII and binary.
Cuándo usar cada uno
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 504 (Parameter Not Implemented): Use a supported parameter value. Check the server documentation or use FEAT to see which parameter options are available.