HP StorageWorks Storage Mirroring for Linux User's Guide (T2558-96078, February 2008)

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The following table identifies how the visual indicators change as the status of failover changes.
Initiating failback
When failover occurs, a source machine has failed. The steps below must be completed in order to complete failback without
IP address or name conflicts.
1. Verify that your source machine is not connected to the network. If it is, disconnect it.
2. Resolve the source machine problem that caused the failure.
3. In the Failover Control Center, select the target machine that is currently standing in for the failed source.
Time to Fail
Countdown
Status Bar Colored Bullets Desktop Icon Tray
Source is Online
The Time to Fail counter
is counting down and
resetting each time a
heartbeat is received
from the source machine.
The status bar
indicates that the
target machine is
monitoring the
source machine.
The bullets are
green.
a
a. When the Time to Fail value has decreased by 25% of the entire timeout period, the bullet changes from green to
yellow, indicating that the target has not received a response from the source. The yellow bullet is a caution signal.
If a response from the source is received, the countdown resets and the bullets change back to green. If the
countdown reaches zero without the target receiving a response from the source, failover begins.
The Windows
desktop icon tray
contains a failover
icon with red and
green computers.
Source Fails and
Failover is Initiated
The Time to Fail
countdown value is 0.
The status bar
displays the source
machine and IP
address currently
being assumed by
the target.
The bullets are red. The Windows
desktop icon tray
contains a failover
icon with red and
green computers.
Failover is Complete
The Time to Fail counter
is replaced with the
“Failed Over”
message.
The status bar
indicates that
monitoring has
continued.
The bullets are red. The Windows
desktop icon tray
contains a failover
icon with a red
computer.
WARNING: Do not connect the source machine to the network at this time.
NOTE: If your target machine has been replaced during failover because of the configuration you selected (perform
failover by replacing target identity with source), do not select your target from the
Target Machine list.
Since the target has been replaced by the source, it no longer exists and the Failover Control Center will
retry for several minutes (possibly up to five minutes), until it finally fails in locating the target. After a
replace failover, select your source machine in the
Target Machine list, which will be monitoring itself in
a failed over state, and perform failback. After failback, the target will be available again.