How to Hot-Add a SAS Shelf - Updated!

A minor update and re-format of this post “How to Hot Add a DS4243 Shelf - A Quick Guide” from 5^th March 2013, for NetApp’s Clustered Data ONTAP!

Section 1: Commands Reference

Clustershell commands worth knowing:

::> system health node-connectivity disk show -node NODENAME

::> system health node-connectivity shelf show -node NODENAME

## START ##

Connected to both nodes via their serial port, run these commands on both controllers:

::> system health alert show -node NODENAME

::> storage disk option show -node NODENAME

::> storage disk option modify -autoassign off -node NODENAME

::> system node autosupport invoke -type all -message "SHELF HOT ADD" -node NODENAME

::> system node run local

> sasadmin expander_map

{Note which adapters the stack of shelves you’re working on is attached to.}

> storage show disk -p

## CABLING WORK for IOM A's (see Section 2A) ##

> storage show disk -p

## CABLING WORK for IOM B'S (see Section 2B) ##

> storage show disk -p

## CABLING WORK for ACP (see Section 3) ##

> options acp.enabled off

> options acp.enabled on

> storage show acp

{Wait for ACP to sort itself out.}

> exit

::> system node autosupport invoke -type all -message "SHELF HOT ADD COMPLETE!" -node NODENAME

Then run config advisor!

## FINISH ##

Section 2A: CABLING WORK for IOM A’s

1) Unplug the “long” cable from the IOM A circle port from the final shelf in the stack, and then plug this cable into the IOM A circle port on the new final shelf

2) Connect from the now empty IOM A circle port on the original final shelf to the IOM A square port on the new shelf (or shelves)

 Continue with section 1...

Section 2B: CABLING WORK IOM B’s

1) Unplug the “long” cable from the IOM B circle port from the final shelf in the stack, and then plug this cable into the IOM B circle port on the new final shelf

2) Connect from the now empty IOM B circle port on the original final shelf to the IOM B square port on the new shelf (or shelves)

 Continue with section 1...

Section 3: CABLING WORK ACP

Simply move the two ACP cables from circle ports on the original last shelf in the stack, into the respective ACP circle ports on the new shelf (or shelves), and “daisy chain” from circle to square the remaining ACP ports.

THE END

And finally … some images courtesy of the original post!

Image 1: Shelf SAS cabling with shelf numbering descending downwards

Image 2: Shelf SAS cabling with shelf numbering ascending upwards