IBM N Series, Hardware Manual

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Chapter 7. Highly Available controller pairs
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In the example, the N series itsonas1 rebooted when you ran the cf takeover command.
When one N series storage system node is in takeover mode, the partner N series node does
not reboot until the
cf giveback command is run.
Starting giveback by using the CLI
While in takeover mode, the N series administrator can move the console context to the
controller that was taken over. This move is accomplished by using the
partner command.
Example 7-12 shows how you can run commands from the N series node that is taken over.
Run the
partner command followed by the command that you need to run. Another partner
command brings the operator back to the takeover N series node. The prompt changes to
reflect which N series node has the console.
Example 7-12 Moving context to the controller that is being taken over
itsonas1(takeover)> partner
Login to partner shell: itsonas2
itsonas2/itsonas1> Tue Apr 12 03:14:02 GMT-7 [itsonas1 (takeover):
cf.partner.login:notice]: Login to partner shell: itsonas2
itsonas2/itsonas1> vol status
Volume State Status Options
vol0 online raid_dp, flex root
Flexvolume_copy online raid_dp, flex create_ucode=on,
sis convert_ucode=on
dedupe online raid_dp, flex create_ucode=on,
sis convert_ucode=on
testdata online raid_dp, flex create_ucode=on,
convert_ucode=on
itsonas2/itsonas1> aggr status
Aggr State Status Options
aggr0 online raid_dp, aggr root
itsonas2/itsonas1> partner
Logoff from partner shell: itsonas2
itsonas1(takeover)>
To give back resources, run the cf giveback command, as shown in Example 7-13.
Example 7-13 cf giveback
itsonas1(takeover)> cf status
itsonas1 has taken over itsonas2.
itsonas2 is ready for giveback.
Takeover due to negotiated failover, reason: operator initiated cf takeover
itsonas1(takeover)> cf giveback
itsonas1(takeover)> Tue Apr 12 03:17:11 GMT-7 [itsonas1 (takeover): kern.cli.cmd:debug]:
Command line input: the command is 'cf'. The full command line is 'cf giveback'.
Tue Apr 12 03:17:11 GMT-7 [itsonas1 (takeover): cf.misc.operatorGiveback:info]: Cluster
monitor: giveback initiated by operator
Tue Apr 12 03:17:11 GMT-7 [itsonas1: cf.fm.givebackStarted:warning]: Cluster monitor:
giveback started
CIFS partner server is shutting down...
CIFS partner server has shut down...