FTP 125 Data Connection Open vs 452 Insufficient Storage
FTP 125 (Data Connection Open) is a 1xx Positive Preliminary response, while 452 (Insufficient Storage) is a 4xx Transient Negative response. 125 indicates that the data connection is already open and the transfer is beginning. No need to open a new data connection. In contrast, 452 means that requested action not taken. Insufficient storage space in system. The server ran out of disk space while processing the command.
説明
The data connection is already open and the transfer is beginning. No need to open a new data connection.
このコードが表示される場合
When the server reuses an existing data connection for a file transfer instead of opening a new one.
解決方法
No fix needed — the transfer is starting immediately. Your client should begin reading or writing data on the existing connection.
説明
Requested action not taken. Insufficient storage space in system. The server ran out of disk space while processing the command.
このコードが表示される場合
When uploading a file and the server's disk is full, or when the user's storage quota has been exceeded.
解決方法
Free up disk space on the server or request a quota increase from the administrator. Delete unnecessary files and retry the upload.
主な違い
125 is a 1xx Positive Preliminary response, while 452 is a 4xx Transient Negative response.
FTP 125: The data connection is already open and the transfer is beginning. No need to open a new data connection.
FTP 452: Requested action not taken. Insufficient storage space in system. The server ran out of disk space while processing the command.
You encounter 125 when when the server reuses an existing data connection for a file transfer instead of opening a new one.
You encounter 452 when when uploading a file and the server's disk is full, or when the user's storage quota has been exceeded.
どちらをいつ使うか
For 125 (Data Connection Open): No fix needed — the transfer is starting immediately. Your client should begin reading or writing data on the existing connection. For 452 (Insufficient Storage): Free up disk space on the server or request a quota increase from the administrator. Delete unnecessary files and retry the upload.