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    [SOLVED] Cannot activate LVs in VG iscsi while PVs appear on duplicate devices.

    Um, wow. All it seemed to take was to install multipath-tools. I did nothing else. My migrated VM started straight away after that. Live migration appears to be working as well. Thank for pointing me in the right direction!
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    [SOLVED] Cannot activate LVs in VG iscsi while PVs appear on duplicate devices.

    Thank you for the reply. I'm not intentionally or knowingly multipathed... my iSCSI SAN is connected to two different VLANs, 100 for management and 110 for storage, through the same switch. Only node A was set up with the iSCSI device through its ethernet port on VLAN 110. When I added node B...
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    ERROR: can't activate LV '/dev/

    It is a shame you didn't get an answer to this. I have the same problem... the same type of 'prefers device x because device was seen first' warnings in a two node cluster when I try to migrate VMs which are on my iSCSI. Did you ever find out anything?
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    [SOLVED] Cannot activate LVs in VG iscsi while PVs appear on duplicate devices.

    Two node cluster, (A) Proxmox 5.0 and (B) Proxmox 5.1 One shared iSCSI with LVM VM disks on iSCSI I get the error in the subject line when trying to migrate an online VM or start a migrated VM. What I've discovered is on node A, iSCSI is sdc and its LVM is sdd, while on node B it is just the...