Installation Guide
output to that port. If you dump the logs into that file, these characters will corrupt the .tar format
of the file. In order to create a valid .tar file, you must connect the serial port to a new and empty
file just before you dump the logs to it.
Step 3
Return to the Virtual Machine console and proceed to dump the logs to the serial port. After
the file is complete, open it with 7-zip, which you can download from http://www.7-zip.org/
download.html.
Step 4
Important: After a successful install, power off the Virtual Machine, edit settings, and remove
the serial port from the Virtual Machine. Leaving the serial port (or any other virtual hardware)
can negatively impact performance of the Virtual Machine. The serial port has no other use
other than dumping the install logs and you will not need it again, unless you perform a fresh
install.
What To Do if the Upgrade Stalls
During the installation of upgrade software, the upgrade may appear to stall. The upgrade log
stops displaying new log messages. When the upgrade stalls, you must cancel the upgrade,
disable I/O throttling, and restart the upgrade procedure. When you successfully complete the
upgrade, you do not need to reenable I/O throttling.
To disable I/O throttling, enter the CLI command utils iothrottle disable.
To display the status of I/O throttling, enter the CLI command utils iothrottle status.
To enable I/O throttling, enter the CLI command utils iothrottle enable. By default, iothrottle
is enabled.
If the system does not respond to the cancellation, you must reboot the server, disable I/O
throttling, and restart the upgrade process procedure.
Where is a Fresh Installation Installed?
All Controller servers have an active bootable partition, an inactive bootable partition, and a
common partition.
The installation creates these partitions, and a fresh (first-time) installation places the new
software and operating system on the active partition. The system boots up and operates on the
active partition.
Where is an Upgrade Installation Installed?
All Controller servers have an active bootable partition, an inactive bootable partition, and a
common partition.
Installation and Upgrade Guide for Cisco Unified Intelligence Center Release 8.5(2)
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Chapter 9: Frequently Asked Questions about the Installation
What To Do if the Upgrade Stalls