Using the emergency shell
At startup, the device tries to locate and load the Comware startup software images. These images can include a boot image, a system image, feature images, and patch images. If the following requirements are met, the device enters emergency shell mode:
The boot image exists and can be used.
The system image, a feature image, or a patch image is missing or corrupt.
After the device enters emergency shell mode, you can log in through the console port to obtain and load a system image to start the Comware system. After the Comware system is started, you can load feature images and patch images. This chapter describes how to obtain and load the system image in emergency shell mode. For information about loading feature and patch images, see "Upgrading software" and "Performing an ISSU."
If more than one member exists on the device, each member starts up independently. If one member enters emergency shell mode, log in to that member through its console port to load a system image for it.
For more information about software images, see "Upgrading software." For more information about how to log in through the console port, see "Logging in through the console port for the first device access."