The NAS shared folder stops being reachable after a certain period.
The NAS shared folder stops being reachable after a certain period.
Not certain about the term "sensor".
Still, there are several actions you can take to monitor signs that the folders might become unavailable. For instance, performing network checks or pings to see if any devices go offline.
The disappearance of folders seems to stem from a combination of factors. Event A is normal, Event B is normal, and Event C is normal.
When all three events occur together, it doesn’t meet the expected condition.
On the Synology NAS, open the Control Panel and examine the File Sharing settings closely.
The process is fairly intricate with many details to consider.
Pay attention to the small upward or downward arrows that adjust other settings.
Examine folders that vanish against those that remain visible (including those that reappear).
Review end-user permissions and configuration options: compare users who notice folder loss with those who don’t. Check subnets, IP addresses, pathnames, etc.
Inspect all logs from the router and NAS.
Set up notifications or alerts. It’s unclear what specific rules or flags to apply.
Just define a few general guidelines that fit your network setup and sharing needs.
The main goal is to receive alerts about any changes in the NAS or network that could precede folder unavailability. These changes might be caused by the NAS itself or other factors.
It’s still advisable to create a detailed network diagram. Include all devices, their names, MAC addresses, IP addresses (static or DHCP), and subnet masks.
The diagram should reflect the actual physical layout, accounting for every device, port, cable, and wireless connection.
This task might require significant effort, particularly with the subnetting details discussed. Consider how many devices exist overall and how they’re distributed across subnets.
What is the IP range assigned to each subnet?
When a device leaves the network, the initial assumption is a physical issue. But other, more complex reasons could be at play. Duplicate IPs, conflicting access rights, or automated actions interfering are possibilities. There may be too many devices for the subnet capacity.
Track who reports that files have vanished again. Note what, when, and which users or systems are online and connected to the shared folders. Record timestamps for each event.
Eventually, it should narrow down to a specific subnet and possibly a particular device or user. It’s possible someone has introduced a rogue device for their own use.
You might uncover the underlying cause and resolve it. Alternatively, fixing one issue could inadvertently trigger another.
This problem requires patience and effort, possibly involving late nights and weekends.
Having a clear overview is extremely beneficial.
If creating the diagram proves challenging, search for free or trial network software that offers discovery features. It’s not a bad idea to try.