QNAP TS-251D user manual

To boot from USB on QNAP NAS, you can follow these steps:
1. Insert the USB drive into one of the USB ports on the QNAP NAS.
. Log in to the QNAP NAS web interface using your admin credentials.
3. Go to the "Control Panel" and click on "System Settings."
4. In the System Settings menu, click on "Boot" under the "System" section.
5. In the Boot menu, click on the "Boot Device" dropdown and select the USB drive that you inserted.
6. Click on "Apply" to save the changes.
7. Restart the QNAP NAS, and it should boot from the USB drive.
Please note that not all QNAP NAS models support booting from USB. Make sure to check the documentation or contact QNAP support for your specific model to confirm if it supports USB boot.

The red light on a QNAP (Quality Network Appliance Provider) NAS (Network Attached Storage) device typically indicates a critical error or a hardware malfunction. It is a warning sign that something is wrong with the device and requires immediate attention. The specific meaning of the red light may vary based on the NAS model and firmware version; therefore, it is recommended to consult the QNAP user manual or contact their technical support for accurate information on interpreting the red light status.

The default password for the QNAP admin account is "admin". It is recommended to change the password after the initial login for security purposes.

To rebuild a QNAP NAS from scratch, follow the steps below:
1. Disconnect the QNAP NAS from the power source and remove all the hard drives.
2. Connect the NAS to a computer directly using an Ethernet cable.
3. Power on the NAS and wait for a few minutes until the NAS gets an IP address from the computer.
4. Open a web browser on your computer and enter the NAS's IP address in the address bar.
5. You will be directed to the QNAP setup wizard. Follow the on-screen instructions to set up your NAS.
6. Once the setup is complete, power off the NAS.
7. Reinstall the hard drives into the NAS, making sure they are properly connected.
8. Power on the NAS again and wait for it to initialize the hard drives.
9. Access the NAS management interface using the IP address you assigned during the setup.
10. Verify that the NAS recognizes all the installed hard drives.
11. If necessary, configure the RAID level and other storage settings based on your requirements.
12. Restore your data to the NAS from a backup or copy it from the computer.
Note: Rebuilding a QNAP NAS from scratch will erase all data and settings on the NAS, so it is crucial to have a backup of your important data before proceeding.