Issue The following error occurred during the scheduled backup process:

[NevilleM]

For the past few weeks we have been receiving this email after the scheduled backup kicks in. Incremental backup is enable but does not work - could the 2 issues be related?

Backup is around 8-10Gb daily and there are 6 multi-volume tar files successfully uploaded on ftp on a daily basis.

Server
Plesk entry point: https://domain.com:883

The following error occurred during the scheduled backup process:

Unable to resume a download of the file from the storage: the content of the retrieved file does not match the content that was previously sent
Check that you can resume downloads from the storage. You can check it independently with the commands:
(echo 123 && echo 456) | curl -T - --ftp-create-dirs -v --ftp-pasv --ssl -k -u ftpuser ftp://1.1.1.1//pleskbackup/test-dir/test-file.txt
curl -C 4 -v --ftp-pasv --ssl -k -u ftpuser ftp://1.1.1.1//pleskbackup/test-dir/test-file.txt
Unable to resume an upload of the file to the storage: the content of the retrieved file does not match the content that was previously sent
Check that you can resume uploads to the storage. You can check it independently with the commands:
echo 123 | curl -T - --ftp-create-dirs -v --ftp-pasv --ssl -k -u ftpuser ftp://1.1.1.1//pleskbackup/test-dir/test-file.txt
echo 456 | curl -T - -a --ftp-create-dirs -v --ftp-pasv --ssl -k -u ftpuser ftp://1.1.1.1//pleskbackup/test-dir/test-file.txt
curl -v --ftp-pasv --ssl -k -u ftpuser ftp://1.1.1.1//pleskbackup/test-dir/test-file.txt

 

[DenisG]

Incremental backup is enable but does not work - could the 2 issues be related?

Yes, they are. You need to enable download/upload resuming on your FTP storage.

 

[NevilleM]

Yes, they are. You need to enable download/upload resuming on your FTP storage.

Thanks - how would I do that please? The ftp is designed for backups and in the past it used to do incrementals so I suspect it is a setting in Plesk/CentOS

 

[Bitpalast]

FTP servers are not necessarily able to resume previously interrupted transfers. This is a setting that needs to be done in the FTP server, not in Plesk. If you do not have access to your FTP backup space, please ask your provider whether the server supports the feature or how it can be enabled.