Nc-backup to NAS fails - tar: Unexpected EOF in archive


Nextcloud version : latest
Operating system and version (eg, Ubuntu 17.04): Nextcloudpi

The issue you are facing:
I ran in the past successfully a manual nc-backup to NAS. Now when running int again the nc-update output says:

[ nc-backup ]
check free space…
Maintenance mode enabled
backup database…
backup base files…
backup data files…
tar: Unexpected EOF in archive
tar: Error is not recoverable: exiting now
error generating backup
Nextcloud is in maintenance mode - no apps have been loaded

Maintenance mode disabled

My backup should be a 12gb file but failed nc-backup created two files:
nextcloud-bkp_20180609_…tar File Size: 131kb
nextcloud-bkp_20180609_1528534374_DiskStation_Jun-09-1055-2018_Conflict.tar File Size: 292.5MB

Is this an issue with the files on nextcloudpi or on DiskStation?

Thanks for any ideas…


Looks like it is a user right issue. The backup that failed was run via the webinterface (user ncp). Now when running the backup via terminal: sudo nextcloupi-config the backup is succesful.

It just works if you first export the configuration file, otherwise backup keeps on failing…when first exporting configuration file also the export of data is successful