3.3

7 Troubleshooting
102
Power Failure
If you experience a power failure, the servers will reboot. After they work their way back to
the login prompt and you have logged in, the servers will not be named, they will be at the
question mark-colon prompt.
?:
If both servers went down at the same time, the databases will still be in mirror and they can
be connected normally and started up:
To connect and start up servers after a simultaneous power failure:
1. On all servers simultaneously, type: connect <server letter>
2. To remove edit locks, on the master computer only, type: dbclean -x .
n
This command is not strictly necessary. “Stale” edit locks are detected and ignored. An edit
lock is considered to be “stale” if the session that owns the lock no longer exists or if the
session was started—logged in—after the edit lock was acquired.
3. On all servers simultaneously, type:
startup
If they are plugged into different UPSs and they ran through the UPS battery and then
lost power and rebooted, you will not know if they went down concurrently. One UPS
might have run longer than another. If so, more stories may have flowed in on a wire or
been saved by a user while the one server was still up and the other was down. The
database will not be in mirror and you will need to go through the recovery process.
Network Failure
The iNEWS newsroom computer system is a networked client-server application. A
well-running Ethernet network is essential for proper communication between the devices.
A network failure can disable the entire system.
The simplest way to test network connectivity is to try to ping other computers on the
network. When you ping a server, your computer sends a “pulse” across the network. The
pulse then is echoed back from the target server and returns to the sending computer in the
form of ICMP replies. If the network or server is down, you will not get replies from the
server (or computer) you are trying to ping. You can ping a computer using its IP address or
name, as shown in the following examples:
NRCS-A$ ping -c 5 152.165.17.110
NRCS-A$ ping -c 5 nrcs-a