Cisco Headend System Release 2.7 Installation Guide

 

84 

4042389 Rev A 

If your upgrade is unsuccessful, you may need to use the procedures in this section 
to restore your system to its condition prior to the upgrade and then to reattach disk 
mirroring on the DNCS. 

Important:  Be sure to notify Cisco Services before concluding that an upgrade has 
failed and before following any of the procedures in this section. In many cases, 
Cisco Services can help you easily resolve the problems related to the failed upgrade. 
In addition, the procedures in this section apply only if you have not yet completed 
the Re-Enable the Disk Mirroring Function. If you have already enabled disk-
mirroring on the DNCS, you will have to restore your system using your latest file 
system and database backup tapes. 

 

Follow these instructions to roll back the DNCS from an unsuccessful upgrade to 
your previous DNCS release. 

Note:  You need to be at the CDE Login window to begin this procedure. If you are 
unable to get to the CDE Login window, call Cisco Services for assistance. 
1  If necessary, open an xterm window on the DNCS. 
2  In Stop System Components (on page 46), use these procedures, if necessary. 

a  Stopping the Application Server 
b  Stopping the DNCS 

3  Complete the following steps to log on to the xterm window as root user. 

a  Type su - and press Enter. The password prompt appears. 
b  Type the root password and press Enter. 

4  Insert the SR4.2 SP4 CD in the drive on the DNCS. 

 Note:  If the File Manager window opens, you can close it. 

5  Type cd /cdrom/cdrom0 and press Enter. The /cdrom/cdrom0 directory 

becomes the working directory. 

6  Type ls -la and press Enter. The system lists the contents of the CD. 
7   Did the system list the contents of the CD as expected? 

a  If yes, skip the next step and go to step 9. 
b  If no, the CD might be defective.  Go to step 8.