Booting Without The Overlay File - HP bh5700 User Manual

properly attach the console cable.
Booting Without the Overlay
If you cannot telnet into the switch and Linux fails to boot, it is likely that a change saved by
zsync has left the switch in an inaccessible state. To allow users to recover from mistakes saved
in the overlay file system, a boot argument of –i passed to the init process will stop the
untarring of the saved overlay files. As a result, the system boots to the factory-shipped
configuration.
1. Connect through the console port. During boot up, the system displays the Linux boot
2. Initiating the –i option of zbootcfg.
3. Reboot the system. After the reboot, clear the –i option from the boot string. Enter the
4. The reboot command will also take -i as an option and pass it to the Linux boot,
5. When the system boots, the overlay file system is returned to the factory-installed
6. Reboot the system.
Ethernet Switch Blade User's Guide
Downloaded from www.Manualslib.com
string. Linux/PPC load: for 5 seconds. During the 5 second pause, enter the boot option
-i and press Return
Linux/PPC load: root=/dev/ram init=/sbin/init -i
zbootcfg –d 1 –i
following command:
zbootcfg –d 1
reboot -i
configuration. At this point, you have a few options.
Caution: All changes you have made and saved prior to the zsync command
will be lost when the command executes.
a) Enter zsync, and the factory-installed system will be restored to your flash.
b) Restore particular files from the existing overlay. Use the zmnt command to mount
the overlay in a designated directory and copy back just the changes you want to keep
from the existing overlay.
For example, if you wanted to recover your /etc/hosts file from the existing
overlay, use zmnt to mount the overlay in a designated directory, like /tmp,
then copy /tmp/etc/hosts to /etc/hosts. Lastly, use zsync to save your
changes (as follows).
zmnt /tmp
cp /tmp/etc/hosts /etc/hosts
zsync /etc/hosts
manuals search engine
File
release 3.2.2j page 158