I am using Resilio Sync on my DS918+ and I am quite satisfied. However, Sync prevents HDD and system hibernation.
I have done the steps described here without success: Sync-prevents-HDD-from-sleeping-on-NAS
When I turn off Sync, hibernation works as expected.
Here are a few lines from hibernation.log
[655007.030806] syslog-ng(380): dirtied inode 13424 (.SYNOCONNDB-wal) on md0
[655007.030877] syslog-ng(380): dirtied inode 20126 (.SYNOCONNDB-shm) on md0
[655007.031722] init(1): dirtied inode 13391 (pkg-LogCenter-syslog.log) on md0
[655007.031739] init(1): dirti