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HDD Hibernation (one of the Volumes)



Hi all,

I`ve read lot of topics here and there, and i`m still not able to make my hdd go sleep/standby. I have two disks in my NAS build. One of them is 128GB SSD, where i`ve installed DSM at the begining and i`m using it as Volume1 (every package is installed there). Then i`ve connected second disk (1TB HDD) and i`ve created Volume2, which i`m using as storage for my music/movies/photos. I`m aware of that DSM is installing itself on every connected disk to machine. I`m accessing Volume2 occasionally, but HDD is never sleeping, it is always active/idle. I`ve tried to change disk settings using hdparm but i can`t see no difference. When I try to use "hdparm -Y /dev/sdc" command,  disk is waking up after few seconds. Additionaly when i use dstat to track disk IO i can see that every 60 seconds (or something like that) some process is writing 4096b to disk. Do you have any ideas what is the problem?

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3 минуты назад, psychodracon сказал:

I`m using MSI B250M Mortar, Intel Pentium G4560T, 8GB RAM, 1x SSD Plextor M5S 128gb, 1x Toshiba P300 1TB with DS918+ 1.04b loader and DSM 6.2.1-23824 Update 4.

DS918+ 1.04b loader didn't hibernate on Juns version yet. Try to do this.

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1 час назад, psychodracon сказал:

Unfortunately it is not working, i`m not sure what process is writing on that disk but i`m sure that it has something to do with journaling.

From syno Knowledge Base

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The volume conditions, services, packages, third party packages and the situation in others below prevent your Synology NAS from entering hibernation mode or will awake your Synology NAS from hibernation mode from time to time.

Volume Conditions

Volume degraded / crashed

Volume not created



LDAP: When your Synology NAS acts as an LDAP client (since DSM 6.0.1).

Local Master Browser: When Local Master Browser is enabled (Go to Control Panel > Win/Mac/NFS > Windows File Service > Advanced Settings > Enable Local Master Browser).

System Log: When any of System Log Tools (Support Center > Support Services > System Log Tools) is enabled (since DSM 6.0).

Thumbnails and indexing: While generating thumbnails or re-indexing multimedia files post-upgrade. During this time, the “synoindexd” process will be listed as “Running” (Go to Resource Monitor > Process).

QuickConnect: When 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.

Your Synology NAS cannot hibernate if a number of concurrent processes requires swap, where RAM capacity has been exceeded and HDDs are used temporarily for read/write operations.


Active Directory Server

Audio Station: When logging is enabled in Audio Station settings (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, please refer to Cloud Sync help).

Cloud Station Sharesync

CMS (Central Management System): When CMS is managing other Synology NAS servers.

Directory Server

Download Station: When Download Station is running eMule, RSS scheduled download, or active tasks.






Document Viewer


MailPlus Server

Mail Server

Mail Station: When Mail Station is running, even when IMAP/POP3 is deactivated and not configured.


Media Server: When DMA logging is enabled in Media Server settings (Go to Media Server > General Settings > Diagnose).

Plex Media Server


Surveillance Station: When there is any device installed or tasks enabled in Surveillance Station.

Virtual Machine Manager: When a cluster is created.

Third Party Packages


Bittorrent sync

Cloud Fleet

DVBLink Server



Logitech® Media Server








Symform Cloud Backup






Other third party software or optware such as SABnzbd.


USB Devices: When any USB device is attached to the unit.


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