Synology DS418play: Disk Space Full, Can't Login via SSH

Title: Synology DS418: Disk Space Full, Can't Login via SSH

Introduction

The Synology DS418 is a popular network-attached storage (NAS) device that provides a range of services, including file sharing, media streaming, and backup solutions. However, users may encounter issues when the root partition of the device's hard drive becomes full, preventing login via SSH. This article aims to provide a detailed solution to this problem.

Understanding the Issue

When the root partition of the Synology DS418 NAS device is full, it may cause issues such as:

• Inability to login via SSH
• System instability
• Loss of data

Resolving the Issue

To resolve the issue of a full root partition on the Synology DS418 NAS device, follow these steps:

1. Log in via the Synology DSM web interface:

   Access the DSM web interface by entering the NAS's IP address in a web browser. Log in with your administrator account credentials.

2. Check disk usage:

   Navigate to Control Panel > System > Disk Management. Check the used and available space for each partition.

3. Identify the problematic directory:

   If the root partition is full, locate the directory consuming the most space. This can be done by sorting the disk usage column in descending order.

4. Clean up unnecessary files:

   Depending on the directory consuming the most space, delete unnecessary files or move them to another partition with more space. For example, if the /var/log directory is consuming too much space, you can delete old log files.

5. Expand the root partition:

   If cleaning up unnecessary files does not free up enough space, consider expanding the root partition. This process involves shrinking another partition (preferably the data partition) and extending the root partition.

   Note: Be cautious when expanding partitions, as data loss may occur if not done correctly. Always backup important data before proceeding.

6. Reboot the NAS:

   After cleaning up unnecessary files or expanding the root partition, reboot the NAS to apply the changes.

Preventing the Issue

To prevent the root partition from becoming full again, consider the following:

• Regularly clean up unnecessary files, especially in the /var/log directory.
• Set up automatic disk cleanup tasks in the DSM web interface.
• Monitor disk usage regularly to catch potential issues early.

References

• Synology DS418 Manual: https://www.synology.com/en-global/knowledgebase/DSM/tutorial/DSM/How_to_clean_up_the_disk_space_on_DS418
• Synology DiskStation Manager (DSM) Disk Management: https://www.synology.com/en-global/knowledgebase/DSM/tutorial/DSM/How_to_use_Disk_Management
• How to expand a Synology NAS drive: https://www.synology.com/en-global/knowledgebase/DSM/tutorial/DSM/How_to_expand_a_NAS_drive

Summary

In this article, we addressed the issue of a full root partition on the Synology DS418 NAS device, preventing login via SSH. We provided a detailed solution, including identifying the problematic directory, cleaning up unnecessary files, expanding the root partition, and preventing the issue from reoccurring. By following the steps outlined in this article, you should be able to resolve the issue and maintain a stable and functional Synology DS418 NAS device.