You are going to be using the "storage adapter" command to disable and re-enable all the adapters.
If you want to do this live, you have to be careful of the four paths.
For instance, if your multipath paths are:
Node 1 0a/1c
Node 2 0a/1c
I would do something like this:
Node 1> storage adapter disable 0a Node 2> storage adapter disable 0a (provided it the same path as node1) --> basically, we want to shut down the entire path from both heads --> i.e. shelf 1 top ESH4 module and shelf 2 top ESH module
--> re-cable the link attached to 0a including the new shelves, daisy-chaining as needed.
Node 1> storage adapter enable 0a Node 2> storage adapter enable 0a
The system should pick up the new disks and will complain about not being multipath-HA
Repeat the process for the other path. Node 1> storage adapter disable 1c Node 2> storage adapter disable 1c (provided it the same path as node1) --> i.e. shelf 1 bottom ESH4 module and shelf 2 bottom ESH module
--> re-cable the link attached to 1c including the new shelves, daisy-chaining as needed.
The system should pick up the new disk paths and should verify multipath-ha
not sure this is supported, but in my head it should work ;)
--tmac
*Tim McCarthy* *Principal Consultant*
Clustered ONTAP Clustered ONTAP NCDA ID: XK7R3GEKC1QQ2LVD RHCE5 805007643429572 NCSIE ID: C14QPHE21FR4YWD4 Expires: 08 November 2014 Expires w/release of RHEL7 Expires: 08 November 2014
On Tue, May 21, 2013 at 7:34 PM, Fletcher Cocquyt fcocquyt@stanford.eduwrote:
This is something I've never had reason to attempt until now.
We have a 3270 cluster (8.1.2) Head 2 aggr1 consists of these two multipathed DS14MK4 trays (IDs 1,2):
http://i.imgur.com/821iN35.jpg
We want to hot add another DS14MK4 trays racked right above (IDs 3,4):
I've read the 2011 DS14MK4 guide and verified the loop speeds are all set consistently and IDs are all unique. (note: trays IDs are 1-4 from bottom to top)
Can I simply:
1 - remove the top two pairs of fiber and transceivers (these go to head 1 (partner)) 2 - daisy chain up from those vacated ports to new trays (3,4) 3 - plug the fiber and tranceivers back in on the top tray?
We would then grow (effectively double) this aggr1's capacity
What are the risks ? (2011 guide mentions panic's are possible with loop misconfig)
(we have 60 VMs running on head 2 on a separate loop and aggregate)
Any other tips appreciated
thanks
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