2011-10-14 11:17 AM
Besides shutting down the filers and physically moving the fiber cable, what other steps need to be taken to safely move our failover loop from slot 2 port 4 into slot 1 port 3?
We have two filers (FilerA and FilerB) running DOT 8.0.2 7-Mode as a cluster. Each filer manages one loop, as well as the failover loop for the other filer's shelves. We need to free up slot 2 on both filers in order to install an external SAS adapter.
While my gut tells me I can simply shutdown both filers and move the fiber cable from slot 2 port 4 into slot 1 port 3, I wanted to verify with the community if this is the best approach.
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2011-10-14 11:35 AM
With the systems down or in maintenance mode there is no issue changing the source hba port (but can't be done with the system up - see similar discussion a day or two ago on here). ONTAP will find the disks on any path. I would go to maintenance mode though and confirm all disks with disk show, storage show -p and aggr status to make sure all disks are available over all paths and all aggrs show up after the change.
2011-10-14 12:27 PM
Thanks Scott! Would this be doable in failover? For example if I:
2011-10-14 12:30 PM
Looks good.. Or move cables in maint mode too.. Then cf giveback and repeat. It would be worth opening a case just to have one proactive in case of any issue then close after.
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2011-10-14 01:57 PM
There was discussion on toasters about shelf unplug and the answer (from NetApp employee) was - the only safe way is with both heads down. It may appear to work with takeover/giveback but you are still risking panic after days or weeks.
Now, moving shelf connection to another adapter basically means "unplugging" all shelves on old one. So I am not sure. I would simply switch off to be on safe side.
2011-10-14 01:59 PM