Managing An Ha Pair Configuration; Halting A Node Without Takeover - IBM N Series Hardware Manual

7.4.1 Managing an HA pair configuration

At a high level, the tasks involved in managing an HA pair configuration are:
Monitoring HA pair configuration status
Viewing information about the HA pair configuration:
– Displaying the partner's name
– Displaying disk information
Enabling and disabling takeover
Enabling and disabling immediate takeover of a panicked partner

Halting a node without takeover

Performing a takeover
For more information about managing an HA pair configuration, see the IBM System Storage
N series Data ONTAP 8.0 7-Mode High-Availability Configuration Guide at:
http://www.ibm.com/storage/support/nas
7.4.2 Halting a node without takeover
You can halt the node and prevent its partner from taking over. For example, you might need
to perform maintenance on both the storage system and its disks. In this case, you might want
to avoid an attempt by the partner node to write to those disks.
To do halt a node without takeover, enter the following command:
halt -f
The syntax for the halt command is:
halt [-d] [-t interval] [-f]
where:
-d
-t interval
-f
Example 7-8 shows how an HA pair node is halted by using the halt -f command. You can
monitor the entire shutdown process to the LOADER prompt by logging on through the RLM
module. Doing so gives you console access even during reboot.
Example 7-8 Halting by using the halt -f command.
itsonas2> cf status
Cluster enabled, itsonas1 is up.
itsonas2> cf monitor
current time: 09Apr2011 01:49:12
UP 8+23:34:29, partner 'itsonas1', cluster monitor enabled
VIA Interconnect is up (link 0 up, link 1 up), takeover capability on-line
partner update TAKEOVER_ENABLED (09Apr2011 01:49:12)
itsonas2> halt -f
CIFS local server is shutting down...
CIFS local server has shut down...
Sat Apr 9 01:49:21 GMT-7 [itsonas2: kern.shutdown:notice]: System shut down because :
"halt".
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IBM System Storage N series Hardware Guide
The storage system performs a core dump before halting.
The storage system halts after the number of minutes specified by interval.
Prevents one partner in a clustered storage system pair from taking over
the other after the storage system halts.