topic Re: Is it possible that pool1 disks exist in the shelf of another HA pair? in ONTAP Discussions

Is it possible that pool1 disks exist in the shelf of another HA pair?

Daniel_66 — Wed, 04 Jun 2025 10:53:45 GMT

There is a 4 nodes cluster, node1/node2 is a HA pair, node3/node4 is another HA pair. I want to use "aggr create aggr1 -mirror true" command to create a mirrored aggregate. Pool0 disks are in the shelf that is connected on node1/node2 HA pair. when assigning pool1 disks, Can I use these disks in the shelf that is connected on node3/node4 HA pair? As per MetroCluster's disk assignment layout, it seems possible that Pool1 disks exist in another HA pair.

I am looking forward to your help, thanks in advanced.

Re: Is it possible that pool1 disks exist in the shelf of another HA pair?

SpindleNinja — Sat, 19 Sep 2020 01:52:12 GMT

I don't think it is possible. MetroClusters have the mechanisms(FC/bridges iWARP/iSCSI) to allow disks to be seen a cross HA pairs at a block layer. The cluster network is IP networking.

Re: Is it possible that pool1 disks exist in the shelf of another HA pair?

Daniel_66 — Mon, 21 Sep 2020 08:57:21 GMT

I think you are right. In the MCCIP, pool1 disks are assigned after issuing the "metrocluster configuration-settings connection connect" command. The command will create iscsi-initiators that are used by partner cluster in order to connect another HA pair's disks(that is pool1 disks). However, local 4 node's cluster can't create these iscsi-initiators, so another HA pair's disks aren't visible. Then it is impossible to assign another HA pair's disks to pool1