As noted at the end of this previous post, upload problems persist with sftp. When using GUI tools like filezilla and gftp, we can see that sometimes the server drops the connection, then the tool reconnects and resumes the upload. filezilla is much faster than gftp, but has support for key-based auth under Settings only in later versions which are not available for the particular OS on saiwaves. Runs OK on WinXP.
Sometimes, when using sftp and it stalls, if we kill the process, then the file at stream.radiosai.org becomes orphaned or something like that. If we delete the file, then also the file appears in ls. After a day or two it disappears on its own - probably when the process times out or something like that.