3Com VCX V7000 Maintenance Manual page 299

3 Switch operating system version
The upgrade from 7.0 to 7.1 may or may not have required the
installation of a new VCX operating system version. This step describes
how to determine if a new operating system version was installed and if
so, how to revert to the previous version.
The examples in this step use the assumption that upgrading from version
7.0 to 7.1 changed the operating system version from 4.2.1 to 5.1.3.
a Log in as root.
b To determine which operating system versions are available, enter this
command:
vcx-os-query
The output from this command appears:
OS Version
A 4.2.1 /dev/hda2
B 5.1.3 /dev/hda3
The operating system versions that you see may vary from the example
shown.
The order of the A and B versions may be reversed depending on the
upgrade history of the system.
When you are downgrading, use the earlier of the two operating system
versions in this command:
vcx-os-switch 4.2.1
To confirm that you have selected the operating system version that you
want, repeat the
"selected" appears in the Status column for the version that you want.
Example:
OS Version
A 4.2.1 /dev/hda2
B 5.1.3 /dev/hda3
4 Reboot the system using this command:
reboot
When the system reboots, it starts VCX 7.0 services.
Partition
/A
/B
command. Verify that the word
vcx-os-query
Partition
/A
/B
Downgrading from 7.1 to 7.0
Label
active
Label
selected
active
299
Status
Status