Resolved: You Can Fix These Common Synology Errors Without Help
Why a lot of Synology errors are easier to fix than they seem
Synology NAS systems are meant to be stable and run themselves, but like any other infrastructure platform, they sometimes show warnings or errors. Many users’ first thought is to call support right away. In reality, a lot of common Synology errors are related to settings or information and can be fixed quickly without help from a professional.
Knowing which problems you can fix yourself can help you avoid unnecessary escalations, keep systems running smoothly, and cut down on downtime.
“Volume Is Almost Full” Error
What It Means
DSM is telling you that a storage volume is almost full.
Why It Happens
- Planning can’t keep up with data growth
- Snapshots take up space
Backup retention is too strict.
How to Fix It
- Remove or save data that you don’t use
- Look over the policies for keeping snapshots
- Increase the size or add more drives
This is one of the most common NAS warnings and is easy to fix.
Disk Warning Detected or “Disk Has Bad Sectors” Error
What it means
SMART monitoring has found early signs that the disk is getting worse.
Why It Happens
- Normal aging of disks
- Heavy workloads for I/O
Things like heat in the environment
How to Fix It
- Do long SMART tests
- Keep an eye on disk health trends
- If the warnings keep coming, replace the disk
Early warnings give you time to do something before something goes wrong.
“Backup Task Failed” Error
What It Means
The scheduled backup job did not finish successfully.
Why It Happens
- Network problems that only last a short time
- Storage for the destination is not available
- The authentication token has run out of time
How to Fix It
- Do the backup again by hand
- Check that the destination is connected
- Reauthenticate targets in the cloud or remotely
It’s normal for backups to fail sometimes, and they usually fix themselves.
“Package Has Stopped Unexpectedly” Error
What It Means
A DSM app or service stopped working.
Why It Happens
- Updates to the package
- Temporary resource conflict
- Changes to the configuration
How to Fix It
- Start the package over
- Look for updates that are still pending.
- Check logs for failures that happen over and over again
When a single-instance package stops, it doesn’t always mean there’s a big problem.
Error: “High CPU or Memory Use”
What It Means
The NAS is very busy.
Why It Happens
- Indexing after changes
- Making a snapshot
Running backup or sync jobs at the same time
How to Fix It
- Let background tasks finish
- Change the schedule for hard jobs
- Look over the running services
Short-term spikes in resources are normal and not a problem.
“Connection Failed” for Remote Access
What It Means
Remote access services can’t connect.
Why it happens
- Changes to the Internet or DNS
- Changes to the router’s settings
The authentication session has ended.
How to Fix It
- First, check local access
- Log back into your Synology account
- Start network services again
Most problems with remote access have to do with the network, not the system.
“Certificate Has Expired” is an error
What It Means
The security certificate for HTTPS access is no longer valid.
Why It Happens
- Renewal by itself didn’t work
- Problems with syncing time
What to Do to Fix It
- In DSM, renew certificates
- Check the time on the system and the NTP settings
This is a common warning that is easy to fix.
“Replication or Sync Delayed” Error
What It Means
The replication jobs are running late.
Why It Happens
- Limitations on bandwidth
- Big changes to data
The destination system is busy.
How to Fix It
- Let replication catch up
- Change the schedules
- Check the amount of data that flows through the network
Delays don’t usually mean that something has gone wrong.
When You Don’t Need Help
You can safely solve problems on your own that:
- Show up once and don’t come back
- Are connected to capacity, updates, or connectivity
- Do not include lost data or lower volumes
Warnings from DSM are often not serious, but they are meant to be.
When You Should Move Up
If you see the following, you should get professional help:
- Repeated disk failures
- RAID or storage pools that have gotten worse
- Corruption of backups that keeps happening
- System crashes that can’t be explained
Knowing the difference saves time and lowers risk.
Stopping Mistakes Before They Happen
Here are some best practices:
- Checking system alerts on a regular basis
- Keeping DSM and packages up to date
- Planning ahead for storage space
- Checking backups and restores
- Going over logs every so often
Proactive management cuts down on mistakes that come out of nowhere.
About the Epis Technology
Epis Technology helps businesses keep their NAS environments stable and secure by providing enterprise IT infrastructure, data protection, and Synology consulting services. The company is an expert in Synology support, proactive monitoring, backup validation, and improving performance. Epis Technology helps businesses with advanced troubleshooting, scaling, or business continuity planning when they need it, even though they can fix a lot of problems on their own.