Array Setup and Networking

HF20 expansion shelf hot or not?

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HF20 expansion shelf hot or not?

I have recenly purchased an expansion shelf for my HF20.  Was about to hot add it but noriced a line on the

• When you activate the expansion shelf, there is a momentary pause in data service
from the array. You might need to activate the expansion shelf during a
maintenance windows.

 As I have both VMware and SQL running on the HF20 is it safe to add a new shelf hot or do I need really need to schedule in maintenance on both VMware and SQL (which would be pretty disruptive!)?

Would be interested to hear if other people have added them hot without issue.



Honored Contributor

Re: HF20 expansion shelf hot or not?

Hi Jon,

'activating' a Nimble expansion shelf is the same as when you do a NimbleOS upgrade. IO will pause for a few seconds, as we restart the data service daemon to build the new RAID set on the shelf.

Lots of customers add shelves do this work without stopping apps / VMs, there should be no reason to schedule a maintenence window. That said, I would always recommend hitting the "activate" button out of hours. Just because

Nick Dyer
twitter: @nick_dyer_
Sheldon Smith

Re: HF20 expansion shelf hot or not?

Can the system be failed over to the other controller with no issues from the I/O pause? There is roughly 1/3rd of that pause when activating the shelf.

Note: While I am an HPE Employee, all of my comments (whether noted or not), are my own and are not any official representation of the company

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New Member

Re: HF20 expansion shelf hot or not?

Thanks for the reply Nick.