patrick.coke
1 Copper

EMC to Compellent Volume Import

I'm looking to see how to import a volume that lives on an EMC array to a Compellent. I'm hoping this can be a SAN to SAN copy without the Windows OS getting invovled. I am also hoping to have as little downtime as possible to the application. Does anyone know where I can get a setup guide for this?

Tags (3)
0 Kudos
9 Replies
kerik
1 Nickel

Re: EMC to Compellent Volume Import

Do you have a server directly connected to EMC/Compellent or is it part of i.e. VMWare?

My guess - you need something that can talk to both at the same time - EMC & Compellent - to achieve what you need.

We are using VMWare, so during our migration from EMC to Compellent we simply were able to vMotion machines from EMC to Compellent, with no downtime at all...

If you have some server directly attached, I don't think you could copy anything between EMC & Compellent without the OS.

0 Kudos
samh22a
1 Copper

Re: EMC to Compellent Volume Import

I think you can't have a server with powerpath connected to a compellent.

0 Kudos

Re: EMC to Compellent Volume Import

When we purchased our Compellent array we migrated our CX-300 Luns by Zoning it's front-end ports directly to the Compellent front end ports. Basically we made a zone between port 0 from SPA and SPB and one port from each of the Storage Center servers. We were then able to map the CX Lun to Compellent as external storage and kick off a Compellent migration.  It's not quite as straight forward as it could be and I believe you have to get professional services involved to get the instructions as they want to make sure they don't make your EMC box go into a panic. We ended up doing a pre-migration phone call where we went over all the steps, then did the migration on our own so it really didn't cost much at all.

So, Yes, you can do it. Yes, it's pretty quick, but the LUN has to be off-line during the copy. No, there isn't a freely available setup guide, and you should really talk with co-pilot or PS before you attempt to do it. (that being said, it's fairly easy to do).

8 Krypton

Re: EMC to Compellent Volume Import

There is a risk of the SPs panicing on EMC if you have Powerpath installed while doing a thin import.

0 Kudos

Re: EMC to Compellent Volume Import

Now there is an even better way to upgrade.  Dell and FalconStor have announced a partner ship for migrating off EMC to Compellent without any downtime!  Since we've already migrated I have not idea on the pricing or particulars, but I bet your Dell rep would be happy to help you out.  Just another option.

0 Kudos
seanmartin14
6 Indium

Re: EMC to Compellent Volume Import

This is mitigated by manually registering the Compellent ports in Navisphere\Unisphere prior to presenting storage to the Compellent. The WWN to register is a combination of the fiber channel port WWN and Compellent Port WWN (i.e., If using Brocade switches, <Device Node WWN>:<Device Port WWN>). Create a new host with any IP, set the initiator type to CLARiiON Open, Failover Mode to Active/Passive Mode-failovermode 1, select the advanced options and check the ArrayCommPath(LUN Z) option.

0 Kudos
npshetty
6 Indium

RE: EMC to Compellent Volume Import

Hello,

while I was trying to register manually the compellent host in an EMC CX4, I get to add only one set of WWN of CML storage. is it true or is there a way to add all the WWN's while manually registering the host in unisphere.

Regards

Shetty

0 Kudos
8 Krypton

RE: EMC to Compellent Volume Import

You should do a 1 to 1 zoning and then mapping of the front end ports within the CX4. This way you can ensure that you are splitting IO across multiple front end ports if you want to run multiple imports at a time.  

There are unpublished documents on the import process that Copilot may give you if you ask but I'm not sure as they're part of the resources used by the Dell Services team.

0 Kudos
Highlighted
npshetty
6 Indium

RE: EMC to Compellent Volume Import

Hello,

I did zone the front end ports 1 to 1 basis. Now the issue I have is any LUN's owned by the SPB shows as status down in unassigned folder in storage Center. I am able to migrate LUN's owned by SPA.

As an alternative I trespassed the one of the LUN from SPB to SPA, in this way the LUN status is up in storage center and I am able to thin import as well.

I did contacted Co Pilot, and he took the webex, but he could not be of much help on this. I re did the zoning included fewer front end ports but no luck.

Any feedback on this please?

Regards

Shetty

0 Kudos