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I have an ISCSI server (NetApp) with multipath support, initially i login (iscsi login from client) with one controller and created an iscsi partition (sdb) in CentOS 7.

Also i copied some data's into it. Now i need to configure multipathing but i don't want to loose my data.

Is it safe/possible to login to the next controller (sdc) and create multipath with out loosing existing data?

James Arems
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Configuring and adding multipath to existing iSCSI disk should not somehow affect data on it. You need to disconnect iSCSI target -> configure multipath on CenOS site -> and then reconnect iSCSI disk using multiple paths.

Stuka
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    May be it will work, i didn't took the risk . I created another iscsi LUN and copied all data and configured multipath . – James Arems Feb 19 '19 at 07:18