*May go boom. It works 95% of the time. That 1% controller panic is a killer though.

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On Feb 12, 2013, at 1:19 PM, "Klise, Steve" klises@sutterhealth.org wrote:

Nope. Netapp goes boom. Only option would be to fail some disks and replace.. Shelves need to stay, or take an outage... At least to my knowledge.. Clustermode would make this easier, but you still have to move off the storage and heads.

-----Original Message----- From: toasters-bounces@teaparty.net [mailto:toasters-bounces@teaparty.net] On Behalf Of Jeff Cleverley Sent: Tuesday, February 12, 2013 1:14 PM To: toasters@teaparty.net Subject: Live disk shelf removal.

Greetings,

Is there a way to remove DS14 MK4 shelves from a running cluster? I need to look into isolating some drives and removing some shelves and would like to do it without having to halt the cluster. This is a 7.3.5.1 Ontap cluster on FAS6080s.

Thanks,

Jeff

-- Jeff Cleverley Unix Systems Administrator 4380 Ziegler Road Fort Collins, Colorado 80525 970-288-4611 _______________________________________________ Toasters mailing list Toasters@teaparty.net http://www.teaparty.net/mailman/listinfo/toasters

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Toasters mailing list Toasters@teaparty.net http://www.teaparty.net/mailman/listinfo/toasters

Since it's not a loop don't do it. Experience loop works but shelves at the end are not a good idea

Have fun. Maybe get up to the last supported version of ontap with ds14 shelves so that u can create 64bit aggregates and make use if vol move commands, etc. Think it 8.0.x Skype michailm33

Good luck and have fun.

Mike

Sent from my HTC

----- Reply message ----- From: "Jeff Cleverley" jeff.cleverley@avagotech.com Date: Wed, Feb 13, 2013 03:11 Subject: Live disk shelf removal. To: "Herring, Jason" jherring@insightinvestments.com Cc: "toasters@teaparty.net" toasters@teaparty.net, "Klise, Steve" klises@sutterhealth.org

I received a number of replies saying it works, but isn't supported. Most likely we won't risk it. I have a test cluster but it doesn't have the same hardware or load as the production boxes.

Thanks,

Jeff

On Tue, Feb 12, 2013 at 2:25 PM, Herring, Jason jherring@insightinvestments.com wrote:

*May go boom. It works 95% of the time. That 1% controller panic is a killer though.

Sent from my iPhone 4S by my iThumbs

On Feb 12, 2013, at 1:19 PM, "Klise, Steve" klises@sutterhealth.org wrote:

...

Nope. Netapp goes boom. Only option would be to fail some disks and replace.. Shelves need to stay, or take an outage... At least to my knowledge.. Clustermode would make this easier, but you still have to move off the storage and heads.

-----Original Message----- From: toasters-bounces@teaparty.net [mailto:toasters-bounces@teaparty.net] On Behalf Of Jeff Cleverley Sent: Tuesday, February 12, 2013 1:14 PM To: toasters@teaparty.net Subject: Live disk shelf removal.

Greetings,

Is there a way to remove DS14 MK4 shelves from a running cluster? I need to look into isolating some drives and removing some shelves and would like to do it without having to halt the cluster. This is a 7.3.5.1 Ontap cluster on FAS6080s.

Thanks,

Jeff

-- Jeff Cleverley Unix Systems Administrator 4380 Ziegler Road Fort Collins, Colorado 80525 970-288-4611 _______________________________________________ Toasters mailing list Toasters@teaparty.net http://www.teaparty.net/mailman/listinfo/toasters

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Toasters mailing list Toasters@teaparty.net http://www.teaparty.net/mailman/listinfo/toasters

-- Jeff Cleverley Unix Systems Administrator 4380 Ziegler Road Fort Collins, Colorado 80525 970-288-4611 _______________________________________________ Toasters mailing list Toasters@teaparty.net http://www.teaparty.net/mailman/listinfo/toasters

For future reference, is there also a problem with removing SAS shelves as well?  Or is it just the loop-based shelves?

________________________________ From: Sebastian Goetze spgoetze@gmail.com To: Jeff Cleverley jeff.cleverley@avagotech.com Cc: toasters@teaparty.net Sent: Wednesday, February 13, 2013 4:12 AM Subject: Re: Live disk shelf removal.

Hi Jeff,

it's unsupported, but with some precautions you could minimize the risks of panic:

* evacuate (provided you have enough spares) the shelf using * disk replace start[-f] [-m] <disk_name> <spare_disk_name> * check that all (relevant) disks have 2 paths * storage show disk -p * -> none of the disks should be in use now, all should be spares * you could now: disk remove <disk_name> * spins them down and let's ONTAP know you're about to remove them... * bypass the shelf on the one path (e.g. the upper ESH) * wait a few minutes (~5) to stabilize the ONTAP MP-config * don't know if that is necessary, but better safe than sorry... * bypass the shelf on the other path (e.g. the lower ESH) Of course if you have SyncMirror, it's a lot easier, but even there you should offline the affected plex(es), just to be nice... (e.g. aggr offline MyAggr/plex03)

Hope that helps, tell us how it went...

Sebastian

On 12.02.2013 22:13, Jeff Cleverley wrote:

Greetings, Is there a way to remove DS14 MK4 shelves from a running cluster? I need to look into isolating some drives and removing some shelves and would like to do it without having to halt the cluster. This is a 7.3.5.1 Ontap cluster on FAS6080s. Thanks, Jeff

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