22 June 2012

Synology network backup failed

There is probably lot of reasons for a network backup to fail, but I would like to expose here my case.

I got the following message each time I've tried to backup my files using synology network backup system :
Network Backup failed to backup task [shared folders and local config] to [mydestinationserver]. ([23] Some files could not be transferred. Possible reasons: 1) backup user has no permission to access the files, 2) files are deleted, 3) illegal file name, 4) too many folders.)
 If I look the network backup log, I see this warning :
Network Backup failed to backup shared folder [/homes] to [mydestinationserver].
After several tests, I've discovered that the cause was the path lenght of certain folders and files in my 'homes' folder.
The path was exceeding 256 characters.

I've simply deleted those folders and finally my network backup ran smoothly.

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