Cisco Headend System Release 2.7 Installation Guide

 

4038415 Rev A 

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In Examine Mirrored Devices (on page 14), sites confirm the disk mirroring function 
is working correctly before beginning the upgrade process. In this procedure you 
now disable the mirroring functions on the DNCS to ensure that the contents of the 
mirrored disk reflects the data and configuration of the DNCS prior to an upgrade. If 
the upgrade fails for any reason, you can then swap the positions of the mirrored 
disks to restore your system to its condition prior to the upgrade attempt. 

Note:  Disabling disk mirroring is sometimes referred to as detaching disk mirroring. 

 

Follow these instructions to detach the disk mirroring function of the Enterprise 450 
or Sun Fire V445, V880, or V890 DNCS.  

Note:  You should still be logged in as root user to an xterm window on the DNCS. 
1  Insert the CD labeled Maintenance CD into the CD drive of the DNCS. 
2  Type the following command and press Enter. A list of the mounted filesystems 

appears. 

Note:  The presence of /cdrom in the output confirms that the system correctly 
mounted the CD. 

3  Type the following command and press Enter to verify whether or not the 

mirrors are attached. Each device should be mirrored and should have two 
submirrors listed under each mirror device. 

Important:  If any metadevice is followed by an indicator listed in parentheses, 
then the metadevice is not Okay. Call Cisco Services. 

4  Are all of the mirrors attached? 

 

If yes, go to step 6. 

 

If no, type the following command and press Enter. A confirmation message 
appears. 

5  Type y and press Enter. The system enables the disk mirroring functions. 

Note:  Attaching the mirrors may take an hour or longer.