Monthly Archives: February 2019

Can’t create tasks in Synology Active Backup for business

My Synology NAS DS1813+ is running for about 6 years, all good. I used the package “Active backup for business” to backup my AWS server data. Just config rsync and then all good to go.

The backup job was running fine for the past a few years. But I noticed that the task stopped since Christmas. When I tried to re-create the task, I got below errors:

And I also found below error message in /var/log/messages:

Tried to reinstall active backup, still the same.
After investigation, I found that this issue was caused by permission structure of my NAS share folder.
My NAS was coming with DSM 4, and after several major version upgrade, now it’s running DSM 6.2. It seems in the past DSM was using UNIX-like ACL and then from DSM 5.* it’s moved to Windows Like ACLs.
So I need to upgrade my NAS to convert share folder permission to Windows ACL:

After convert, Active backup starts working again.