R21xx-HP FlexFabric 11900 Fundamentals Configuration Guide

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Comware image redundancy and loading procedure
You can specify two sets of Comware software images: one main and one backup.
The system always attempts to start up with the main images. If any main image does not exist or is
invalid, the system tries the backup images. Figure 34 sho
ws the entire Comware image loading
procedure.
This procedure assumes that the main image set and the backup image set have feature packages and
patch packages. If an image set does not have feature packages or patch packages, the system can use
the image set to start up after the boot image and the system image passes verification.
If neither the main boot image nor the backup boot image exists or is valid, connect to the console port
and power cycle the device to access the Boot menu for loading a boot image. For more information
about downloading and loading a boot image, see the release notes for the software version.
Figure 34 Comware image loading procedure
System startup process
Upon power-on, the BootWare image runs to initialize hardware, and then the startup software images
run to start up the entire system, as shown in Figure 35. T
o access the Boot menu, you must press Ctrl+B
within 5 seconds at the prompt.
Main boot image exists
and valid?
Start
Backup boot image
exists and valid?
No No
Start up from the Boot menu
Main system image
exists and valid?
Backup system image
exists and valid?
No No
Yes Yes
All main feature
packages exist and
valid?
All backup feature
packages exist and
valid?
No No
All patch packages exist
and valid?
All backup patch
packages exist and
valid?
No No
Yes Yes
Yes
Yes
Yes Yes
Start up with the main images
Start up with the backup
images