The following article will guide you on what to do when the device is not booting up correctly with VOS installed:

the First, Console in the appliance with a laptop connecting to the console port

Make sure the following settings are correct:

• Correct COM port (Check the Device Manage to find the correct COM port)
• Baud Rate: 115200

With the above two, we should be able to console into the appliance but if it is still failing

Make sure the following are checked

• Good working console cable
• Check with another laptop 

If you are getting the following prompt on the console or the OS is not getting detected

Make sure the following condition is checked

• Boot priority

How to enter into BIOS

• Connect your laptop to the Versa appliance using a console cable.
• When the appliance is booting up, press the Esc/Del key to interrupt the boot process and enter BIOS mode.
• If you don't get the Esc/Del option during boot up, or miss it, power cycle or reboot the appliance to see the prompt again to enter into BIOS.

Go to the BIOS menu > Boot option

Make sure HDD/SSD is getting detected as shown in the below window

If the HDD/SSD is not getting detected then it means an issue with the HDD/SSD

Eg for such cases

In the below image, we are not able to detect Hard Disk 5 but only able to see Hard Disk 3

In this case, you can try doing the below and check if this helps

Option 1:

Go to Save & Exit

Select restore default => then select Save and reset

The system system will reboot. Then, go back into bios and check if it's detected in both the Boot page and Save & Exit page

If option 1 doesn't work then do option 2

Option 2: 

Power cycle the box once and check again if it's detected after the power cycle (Remove all power cords => wait ~ 1min => plug-in power cords)

• If the HDD/SSD is getting detected upon power cycle then make sure HDD/SSD is getting selected as Boot Option 1 or 2. 

• If it is selected at 2 and USB is selected at boot option 1 then make sure USB is not inserted, so it can boot correctly through HDD/SSD
  
  
  
• If the HDD/SSD is getting detected and it is still not booting up properly then do USB ISO Installation following the document (Make sure USB has selected at Boot Option #1): https://docs.versa-networks.com/Getting_Started/Deployment_and_Initial_Configuration/Branch_Deployment/Installation/Install_on_Bare_Metal

Once the ISO installation is done successfully, you should be able boot up with VOS.

If HDD/SSD is still not getting detected then it is an issue with HDD/SSD which is not getting detected. If it is CSG device, collect the information mentioned in the document here and check with support: