Cisco Headend Digital Broadband Delivery System Guia Do Utilizador
Back Up the DNCS or Application Server File System
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Failure of File System Backups and the Real-Time, Class Process
Occasionally, the file system backup of the DNCS or the Application Server may fail.
If the backup fails, system operators should check whether there are any real-time,
class processes that are running. Current file system backup scripts can handle only
the ntpd process that is running as a real-time class process.
Note: The ntpd process is an operating system daemon that sets and maintains
Note: The ntpd process is an operating system daemon that sets and maintains
system time in synchronization with Internet standard time servers.
If the file system backup fails, system operators should complete the following steps
If the file system backup fails, system operators should complete the following steps
to see if any real-time, class processes are running.
1 From an xterm window on the DNCS or the Application Server (depending
1 From an xterm window on the DNCS or the Application Server (depending
upon which file system backup failed), type ps -efc | grep RT and then press
Enter. The system reports whether any real-time, class processes are running.
2 Are any real-time, class processes running (other than the ntpd process)?
If yes (and the file system backup still failed), call Cisco Services for
assistance.
If no, re-run the procedures to back up the file system. If the backup still fails,
call Cisco Services.
Specific Platform Considerations
Before backing up the file system of a Sun Enterprise 450 or Sun Fire V240, V245,
V440, V445, V880, or V890 DNCS, our engineers recommend that system operators
first check the dncs and root user e-mail accounts on the DNCS. The e-mail accounts
will reveal whether any metadevice errors exist on the DNCS.
Preparing for the File System Backup
Complete the following steps to prepare for the DNCS or Application Server file
system backup.
1 Are you backing up a Sun Enterprise 450 or Sun Fire V240, V245, V440, V445,
1 Are you backing up a Sun Enterprise 450 or Sun Fire V240, V245, V440, V445,
V880, or V890 DNCS?
If yes, check the dncs and root user e-mail accounts on the DNCS for the
presence of metadevice errors.
Note: Correct any metadevice errors before proceeding with the backup.
Note: Correct any metadevice errors before proceeding with the backup.
Call Cisco Services if you need help in correcting metadevice errors.
If no, go to step 2.
2 If necessary, open an xterm window on the DNCS or the Application Server,
whichever server you are backing up.
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.
b Type the root password and press Enter.