Cisco Headend System Release 2.7 Installation Guide

 

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4013154 Rev C 

In this procedure, you will detach the disk mirrors of the Enterprise E450 or Sun Fire 
V880 DNCS. If you fail to detach the disk mirrors, you must restore from a tape back 
up. Detaching the mirrors allows you the option of recovering quickly in the event of 
a failed upgrade by booting from the standby drives. 

Important!  Skip this procedure if the DNCS you are upgrading is an Enterprise 250. 
Disk mirroring pertains only to the Enterprise E450 or Sun Fire V880 DNCS. 

Note:  You should still be logged on to an xterm window on the DNCS as root user. 

 

Complete the following steps to detach the disk mirrors before the upgrade to SR  
4.0 SP2. 
1  Insert the CD labeled DBDS Maintenance CD   4.0 SP2 (or later) into the CD 

drive of the DNCS. 

2  Type df  -n and then 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 /cdrom/cdrom0/s3/backup_restore/mirrState  -d and then press Enter. The 

system displays the following message: 
WARNING!! 
Proceeding beyond this point will DETACH all d7xx submirrors. 
Are you certain you want to proceed? 

4  Type y and then press Enter. The system disables the disk mirroring functions on 

the DNCS.