IBM N Series, Hardware Manual

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IBM System Storage N series Hardware Guide
򐂰 Halting a node without takeover
򐂰 Performing a takeover
For more information about managing an HA pair configuration, see IBM System Storage N
series Data ONTAP 8.0 7-Mode High-Availability Configuration Guide, which is available at
this website:
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 halt a node without takeover, enter the following command:
halt -f
The following syntax is used for the halt command:
halt [-d] [-t interval] [-f]
where:
-d
The storage system performs a core dump before halting.
-t interva l The storage system halts after the number of minutes specified by interval.
-f Prevents one partner in a clustered storage system pair from taking over
the other after the storage system halts.
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".
Sat Apr 9 01:49:21 GMT-7 [itsonas2: fcp.service.shutdown:info]: FCP service shutdown
Sat Apr 9 01:49:21 GMT-7 [itsonas2: perf.archive.stop:info]: Performance archiver stopped.
Sat Apr 9 01:49:21 GMT-7 [itsonas2: cf.fsm.takeoverOfPartnerDisabled:notice]: Cluster
monitor: takeover of itsonas1 disabled (local halt in progress)
Sat Apr 9 01:49:28 GMT-7 [itsonas2: cf.fsm.takeoverByPartnerDisabled:notice]: Cluster
monitor: takeover of itsonas2 by itsonas1 disabled (partner halted in notakeover mode)
CFE version 3.1.0 based on Broadcom CFE: 1.0.40