Numerous factors can influence the hibernation of your Synology NAS or lead to unintended wake-ups. This article aims to outline the various scenarios that may impact the hibernation of your NAS.

Volume Status

• The volume has degraded or crashed.
• No volume has been created.

Services

Your Synology NAS may not be able to hibernate in any of the following scenarios:

• An automatic DSM update scheduled check is running. To check or edit when automatic DSM update checks will run, go to DSM Control Panel > Update & Restore > Update Settings > Check Schedule.
• Collect debug logs: Collect debug logs is enabled. Check this at the following locations:
  • DSM 7.0 and above: Control Panel > File Services > SMB > Advanced Settings > Others
  • DSM 6.2 and below: Control Panel > File Services > SMB/AFP/NFS > SMB > Advanced Settings
• DDNS: You are using DDNS. Check the DDNS settings by going to Control Panel > External Access > DDNS.
• Data scrubbing schedule: A data scrubbing schedule is enabled. Check this at the following locations:
  • DSM 7.0 and above: Storage Manager > Storage > select storage pool > Schedule Data Scrubbing
  • DSM 6.2 and below: Storage Manager > Storage Pool > Data Scrubbing > Set Schedule
• DHCP: You have enabled the Get network configuration automatically (DHCP) option on any LAN. Check this by going to Control Panel > Network > Network Interface > select the LAN > Edit.
• IP conflict detection: IP conflict detection is enabled. Check this by going to Control Panel > Network > General > Advanced Settings.
• Recycle Bin schedule: You have a scheduled task to empty the recycle bin. Go to Control Panel > Task Scheduler to check if there is a task to empty the recycle bin.
• Resource Monitor: Enable usage history is selected. Check this by going to Resource Monitor > Settings.
• File Services: SMB/AFP/FTP/NFS is enabled, any file transfers between a Synology NAS and a host or any SMB/CIFS broadcast packets may prevent the system from hibernating, including Windows Explorer running on the same network.
• IPv6: IPv6 is enabled. Go to Control Panel > Network > Network Interface to select a LAN, and then click Edit > IPv6 > IPv6 setup.
• Domain/LDAP: Your Synology NAS is acting as a domain/LDAP client (starting from DSM 6.0.1).
• Local Master Browser: Local Master Browser is enabled. Check this at the following locations:
  • DSM 7.0 and above: Control Panel > File Services > SMB > Advanced Settings > Others
  • DSM 6.2 and below: Control Panel > File Services > SMB/AFP/NFS > SMB > Advanced Settings
• NTP: Your Synology NAS is synchronizing data with other network devices via NTP service. You can check this at Control Panel > Regional Options > NTP Service > Enable NTP service. After DSM 7.2, NTP service no longer prevents Synology NAS hibernation.
• QuickConnect: QuickConnect is enabled. Check this at the following locations:
  • DSM 7.0 and above: Control Panel > External Access > QuickConnect
  • DSM 6.2 and below: Control Panel > QuickConnect > General
• Remote Access: Remote Access is enabled. Check this by going to Support Center > Support Services > Remote Access.
• Router Configuration: Port forwarding rules have been configured. Check this by going to Control Panel > External Access > Router Configuration.
• Security Advisor: Your Synology NAS will wake up during a scheduled scan, including scan schedules that are enabled by default. Check if you have any scan schedules by going to Security Advisor > Advanced > Scan Schedule.
• Share Network Location: The option to display your Synology NAS in Web Assistant is selected.
  • DSM 7.0 and above: Allow this Synology NAS to be displayed in Web Assistant located at Control Panel > Info Center > Device Analytics > Share Network Location
  • DSM 6.2 and below: Enable Web Assistant located at Control Panel > Info Center > Device Analytics > Share Network Location
• Space Reclamation: When the system automatically starts space reclamation as scheduled in Storage Manager > Storage Pool > Global Settings > Set Time Grid, your Synology NAS will wake up.
• System Log: Any System Log Tools are enabled (starting with DSM 6.0). Check these settings by going to Support Center > Support Services > System Log Tools.
• SSD Cache: SSD cache is in use, Resource Monitor will continuously record SSD Cache hit rate.
• Thumbnails and indexing: The system is generating thumbnails or re-indexing multimedia files after updates. The "synoindexd" process will be listed as"Running" at the following locations:
  • DSM 7.0 and above: Resource Monitor > Task Manager > Processes
  • DSM 6.2 and below: Resource Monitor > Processes
• VPN clients: You are using VPN clients. Check this by going to Control Panel > Network > Network Interface.
• Windows Media Player: Windows Media Player's Network Sharing Service is enabled on the LAN.
• WriteOnce: WriteOnce shared folders rely on the Tamper-Proof Clock mechanism to determine the retention period. The clock writes the time back onto the drives once a day.
• 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.

Packages

The following packages or package settings may affect the hibernation of your NAS:

• Synology Directory Server (formerly Active Directory Server)
• Active Backup for Business
• Active Backup for Business Agent (DSM): If this package is installed on your NAS and has set up connection to another NAS.
• Active Insight service is enabled.
• Audio Station: If logging is enabled. To check if this is enabled, go to Audio Station > Settings > Advanced > General Settings > Enable Audio Station log for diagnosis.
• Calendar
• Cloud Station Server
• Cloud Sync: Cloud Sync monitors changes to sync your Synology NAS with public cloud services, which may prevent or interrupt hibernation. Learn how to fix this issue.
• Cloud Station ShareSync
• Central Management System: If CMS is managing other Synology NAS servers.
• Container Manager
• LDAP Server (formerly Synology Directory Server)
• Log Center: If there are any devices connected.
• DNS Server
• Download Station: When Download Station is running eMule, an RSS scheduled download, or other 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 if IMAP/POP3 is deactivated and not configured.
• MailPlus
• Media Server: If DMA logging is enabled. To check this, go to Media Server > General Settings > Diagnose.
• Plex Media Server
• PetaSpace
• Proxy Server
• Surveillance Station: If there are any devices installed or any tasks enabled.
• Synology Contacts
• Synology AI Console: If token limits are enabled on any API integration.
• Synology Drive Server: If there are any devices connected.
• Virtual Machine Manager
• VPN Server
• WebDAV Server

Others

• Third-party packages: If any third-party package is running.
• USB devices: If any USB device is attached to the unit.
• Synology Photos app

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

• Set a startup and shutdown schedule:
  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.
• Enable auto poweroff:
  1. Go to Control Panel > Hardware & Power > HDD Hibernation and tick Enable auto poweroff.¹
  2. 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 and MAC address in a WOL application, such as Synology Assistant or DS finder.