Hi there! I see your Zosi system is showing a "lost disk" message and is not recording. That definitely needs fixing. To help you better, could you tell me if the hard drive inside your DVR/NVR was working fine before this happened? Also, have you checked if the system restarts on its own or if there are any unusual noises from the hard drive?

Meanwhile, here’s a good step-by-step way to start troubleshooting:

1. Power Off and Inspect Connections: Turn off your system and open the DVR/NVR casing carefully. Check if the hard drive cable (both power and data connectors) are firmly and properly connected. Sometimes, loose cables can cause this “lost disk” issue.

2. Check the HDD Indicator Light: When the system is on, look at the front panel for the hard drive status light. If it’s off or blinking abnormally, the hard drive might not be recognized or is malfunctioning.

3. Try a Different Power Supply: Sometimes, if the power supply to the DVR or NVR is weak or failing, the hard drive may lose connection intermittently. If possible, try swapping the power adapter with another working 12V power supply to see if that resolves the issue.

4. Test the Hard Drive on Another Device: If you have a PC or another DVR, try connecting the hard drive to it to check if it’s recognized and healthy.

5. Reformat the Hard Drive: If the drive is recognized but corrupted, formatting it through the system setup might restore functionality—though it will erase all stored footage, so back up anything important first.

If after these steps the message persists or if the hard drive isn’t recognized at all, the hard drive might be defective and might require replacement.

Does this align with what you’ve tried so far? If yes, I can guide you toward the next steps or how to contact Zosi support directly.

Are you satisfied with this initial guidance?

how do i reformate the hard drive

Thanks for asking about formatting the hard drive on your Zosi Smart system. Formatting the hard drive can help resolve the “lost disk” issue if the drive is recognized but corrupted. Here’s a straightforward way to format your hard drive using your Zosi DVR/NVR system on Windows:

1. Access Your Zosi Device's Menu:
Open your Zosi Smart client software on your Windows system and log in to your DVR/NVR device.

2. Go to the Main Menu:
Locate and click the “Menu” button, usually found on-screen or via right-click on the live view.

3. Navigate to Disk Management:
Inside the main menu, find the “Setup” or “System” section, then select “Disk Management” or “Hard Disk.” This is where you can view the status of connected hard drives.

4. Select the Hard Drive to Format:
You should see a list of recognized hard drives. Select the drive showing “Lost Disk” or the one you want to format.

5. Format the Drive:
Look for an option like “Format” or “Initialize” and select it. The system will warn you that formatting will erase all current recordings—confirm to proceed.

6. Wait for Completion:
The format process might take a moment. Once done, the drive status should change to “Normal,” and recording should resume.

If you prefer a video guide, Zosi provides official tutorials that show how to format a hard drive in their DVR system, which can be great for visual steps. Here’s one that might help: ZOSI Security System - How to format the HD in DVR?

Should this not work, please let me know if the drive is showing at all in Disk Management or if you get any errors. We can then look into more advanced troubleshooting.

Are you satisfied with this formatting guide, or would you like me to assist you step-by-step?