Hot-add new loop

[dunno1958]

Hope someone can help.

Can I hot-add a new loop (DiskShelf14mk4) without an outage on 7.3.2?

I've seen this: http://now.netapp.com/NOW/knowledge/docs/ontap/rel732_vs/html/ontap/aaconfig/GUID-DA40D7A0-A8F2-41FC-9C71-C3C8F4D8BA47.html which says explicitly that:

To add storage to an active/active configuration configured for Multipath Storage, you need to add the new disk shelf to the end of a loop, ensuring that it is connected to the previous disk shelf and to the controller.

I haven't seen a doc saying I can hot-add a new loop.

Thanks

[aborzenkov]

Yes, you can add new loop online. If this is onboard HBA, you need to make sure HBA is set to initiator, not target; to change mode you need to reboot filer.

[dunno1958]

Thanks for the reply.

Is there a NetApp doc that confirms this?

Thanks

[scottgelb · Accepted solution]

The hardware and service guide for the shelf states support to hot add to an existing adapter with support added for this in ONTAP 7.2.

http://now.netapp.com/NOW/public/knowledge/docs/hardware/filer/210-01431.pdf

See page 84, "Hot-adding a disk shelf to an existing adapter in your system"

[dunno1958]

Cheers Scott

[dunno1958]

Sorry, more questions! I'm adding three FC shelves to an active/active cluster in a new loop and NetApp suggests adding one shelf at a time. even after looking at the docs I'm not 100% sure:

I was going to add a single shelf first to both controller heads in the cluster but only single pathed, i.e. no multipathing

1. NetApp1 controller: insert fibre cable to port 0b

2. Shelf 1: insert fibre cable from NetApp1 0b to module A input

3. NetApp2 controller: insert fibre cable to port 0b

4. Shelf 1: insert fibre cable from NetApp2 0b to module B input

If all is OK at this stage I was going to add the additional shelves (still single pathed) followed by introducing the multipathing

5. NetApp1 controller: insert fibre cable to port 1b

6. Shelf 3: insert fibre cable from NetApp1 1b to module B output

7. NetApp2 controller: insert fibre cable to port 1b

8. Shelf 3: insrt fibre cable from NetApp2 0b to module A output

Does this sound reasonable?

[scottgelb]

That sounds reasonable. Adding one shelf at a time then mpha after..I prefer one change at a time like this.. I would also send an autosupport before and after the shelf addition so the configuration is sent in case of any issues. You can also open a case to review your procedure.

Typos Sent on Blackberry Wireless

[dunno1958]

Thanks Scott

[scottgelb]

Also check the speed setting and shelf ids… the most common issue is the shelf-id isn’t set or the shelf speed isn’t set correctly.