You can import a system disk image file from your local PC or other cloud and register the image file as a private image. Then, you can use this image to create ECSs or reinstall the OSs for existing ECSs.
Process
Figure 1 shows the process of creating a private image.
Figure 1 Creating a Windows system disk image

As shown in the figure, the following steps are required to register an external image file as a private image:
- Prepare an image file that meets the cloud platform requirements. For details, see Preparing an Image File.
- Upload the image file to your OBS bucket. For details, see Uploading an Image File.
- On the management console, select the uploaded image file and register it as a private image. For details, see Registering an Image File as a Private Image.
- After the private image is registered, you can use it to create ECSs. For details, see Creating a Windows ECS from an Image.
Parent topic: Creating a Windows System Disk Image from an Image File
- Process