Certain conditions or factors, including volume status, services, packages, or third-party packages, may prevent your Synology NAS from hibernating or may wake up your Synology NAS from hibernation mode from time to time.

Volume Status

• Volume degraded or crashed
• Volume not created

Services

• DDNS
• Router configurations
• LDAP: When your Synology NAS acts as an LDAP client (starting from DSM 6.0.1)
• Local Master Browser: When Local Master Browser is enabled at the following locations
  • For DSM 7.0: Go to Control Panel > File Services >SMB > Advanced Settings > Others
  • For DSM 6.2 and earlier: Go to Control Panel > File Services > SMB/AFP/NFS > SMB > Advanced Settings
• Collect debug logs: When Collect debug logs is enabled at the following locations
  • For DSM 7.0: Go to Control Panel > File Services >SMB > Advanced Settings > Others
  • For DSM 6.2 and earlier: Go to Control Panel > File Services > SMB/AFP/NFS > SMB > Advanced Settings
• File Services: When SMB/AFP/FTP/NFS is enabled, any file transfers between Synology NAS and host, or any SMB/CIFS broadcast packets may prevent the system from going into hibernation, including Windows Explorer running on the same network
• NTP: When NTP service is used to synchronize with other network devices (Go to Control Panel > Regional Options > NTP Service > Enable NTP service)
• Security Advisor: When Security Advisor is enabled, your Synology NAS will be woken up during the running of a scheduled scan
• Automatic DSM Update scheduled check
• System Log: When any of System Log Tools at Support Center > Support Services > System Log Tools is enabled (starting from DSM 6.0)
• Thumbnails and indexing: When the system is generating thumbnails or re-indexing multimedia files after updates. During this time, the “synoindexd” process will be listed as “Running” at the following locations
  • For DSM 7.0: Resource Monitor > Task Manager > Processes
  • For DSM 6.2 and earlier: Resource Monitor > Processes
• QuickConnect: When the QuickConnect service or remote access (Support Center > Support Services > Remote Access) is enabled
• Windows Media Player: When Windows Media Player’s Network Sharing Service is enabled in the LAN
• IPv6: When IPv6 is enabled, your Synology NAS might be woken up from hibernation (Go to Control Panel > Network > Network Interface, select a LAN, and click Edit > IPv6 > IPv6 setup)
• Your Synology NAS cannot hibernate if several concurrent processes require memory swap, where RAM capacity has been exceeded and HDDs are used temporarily for read/write operations
• VPN clients

Packages

• Synology Directory Server (formerly Active Directory Server)
• Audio Station: When logging is enabled (Go to Audio Station > Settings > Advanced > Enable Audio Station log for diagnosis)
• Cloud Station Server
• Cloud Sync (For a list of public cloud services that affect hibernation, refer to Cloud Sync help)
• Cloud Station ShareSync
• Central Management System: When CMS is managing other Synology NAS servers
• LDAP Server (formerly Directory Server)
• DNS Server
• Download Station: When Download Station is running eMule, RSS scheduled download, or active tasks
• Docker-Discourse
• Docker-GitLab
• Docker-LXQt
• Docker-Redmine
• Docker-Spree
• Document Viewer
• MailPlus Server
• Mail Server
• Mail Station: When Mail Station is running, even when IMAP/POP3 is deactivated and not configured
• MailPlus
• Media Server: When DMA logging is enabled (Go to Media Server > General Settings > Diagnose)
• Plex Media Server
• PetaSpace
• Proxy Server
• Surveillance Station: When there are any devices installed or tasks enabled
• Synology Contacts
• Synology Drive Server: When there are any devices connected
• Virtual Machine Manager: When there is a running virtual machine or there are multiple hosts in a cluster
• VPN Server
• WebDAV Server

Others

• Third-party packages: When any third-party package is running
• USB devices: When any USB device is attached to the unit

If you do not wish to disable any of the above packages or services, but still wish to save energy, try either of the following methods:

• Startup and shutdown schedules:
  1. Go to Control Panel > Hardware & Power > Power Schedule > Create, select Startup, specify the Date and Time, and click OK.
  2. Go to Control Panel > Hardware & Power > Power Schedule > Create, select Shutdown, specify the Date and Time, and click OK.
• Auto power off:
  • Go to Control Panel > Hardware & Power > HDD Hibernation and tick Enable auto poweroff.
  • After your Synology NAS is automatically powered off, you can wake it up via the Internet or LAN by entering the Synology IP (or DDNS name) and MAC address in a WOL application such as Synology Assistant or DS finder.