First Way (My Advice);
1 – Power Off Nas and Plug out all HDDs,
2 – Start Qnap witout HDD’s
3 – A few minutes later, Qnapfinder should find your NAS. Start the setup.
4 – When Qnap ask you to Plug HDD, one by one, but wait 15 second while inserting next one
5 – After 15 minutes, Qnap should format & Installation should complete. Now login device and go to RAID Managments screen. Plug all HDD’s, and start “Format” Process for all HDDs.
6 – If all HDD scan result is Good, Start building RAID at the same menu. This should take around 12 Hours to complete synronization.
Login Qnap and go to Administration Page -> Reset to Factory Defaults. This will Reset, Format and Install RAID system.
Qnap Offical Complete Reinitialization Document;
The following information is two methods for performing a complete re-installation of a QNap NAS. The first involves hot swapping the hard disks at a particular point in the process. The second involves installing the hard disks in another computer and using an application to remove the partitions from the drives.
DANGER: BOTH METHODS DESCRIBED BELOW WILL DELETE ALL DATA. IF YOU GOT IT AND WANT TO KEEP IT. BACK IT UP!
Method 1 (Hot swapping)
- Remove your HDD(s) from the tray (if for TS-109, the same).
- Boot up the NAS without HDD(s) installed. You will hear a short beep, and after about 1~2 minutes, a long beep.
- The system will use the embedded image to boot up.
- Then run the Finder on your PC, it will help you to find the NAS on the network.
- Use the default ID (admin) and password (admin) to login if it asks.
- Hot-plug the HDD(s) into the NAS.
- Go through the installation process including formating hard disk and installing the firmware.
Method 2 (Manually removing partitions using a Windows PC)
- Shut down the NAS and remove the HDD(s) from the tray.
- Install the HDD(s) in a Microsoft Windows client machine.
- Boot the client computer and open the Computer Management application. (Right click My Computer –> Manage)
- Locate the HDD(s) from the NAS in the Disk Management section and delete all the partitions.
- Shut down the client computer and remove the HDD(s).
- Install the HDD(s) in the NAS.
- Boot the NAS. As there is no OS installed the NAS uses its embedded image to boot.
- Run the QNAP Finder application on the client machine to locate and connect to the NAS.
- Use the default username (admin) and password (admin) to login if it ask.
- Go through the installation process including formatting the HDD(s) and installing the firmware.
Method 3 (Manually removing partitions using QNAP)
- On TS110, TS210 there is fdisk available. So login to your QNAP with ssh and type in mount on the list find the device binded with /share/HDA_DATA (for single disk configuration) or /share/MD0_DATA (for raid configurations). Launch fdisk with the disk as a parameter and remove all partitions.
- There is also another more brutal way to destroy the partition table on the disk: dd if=/dev/urandom of=<name of your HDD device> bs=1024k count=1.