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March 22nd, 2010 02:00
Newbie: Migration to PowerPath from IBM SDD Kit
Hello,
I will start by saying that I am new to EMC kit so please be gentle with me
I am trying to migrate my hosts from an IBM ESS 800 over to a NS120.
Here is what I have done so far:
I have some Windows 2003 exchange servers with the IBM SDD multi-pathing software installed. They have presented some fibre LUNs from an ESS 800 and the NS 120.Unfortunately those servers are seeing the EMC LUNs multiple times. My guess is that the IBM software is not rationalising the multiple paths to the EMC LUNs.
Can I simply remove the IBM multi-pathing software and install the EMC Power path software on these exchange servers?
Will the power path software makes sense of the multiple paths to the IBM LUNs? I need to be see both the EMC and the IBM LUNs for a week or so so that we can migrate the data.
many thanks
Mike
dynamox
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March 22nd, 2010 04:00
i would not remove IBM SDD because that will cause multipathing issues with IBM LUNs. I would simply present only one path from Celerra, migrate your data. On the cut-over day, un-install SDD, unpresent IBM LUNs, install PowerPath , present additional paths to the server.
dynamox
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March 22nd, 2010 06:00
Mike,
that's true, PowerPath can manage qualified 3rd pary arrays. Unfortunately PowerPath on Windows does not support ESS series, if you had a Linux/AIX server, you could load PowerPath and manage both vendor arrays using PowerPath. If you go to E-Lab Navigator and just add ESS storage array you will see the different supported combinations.
Vinyljunky
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March 22nd, 2010 06:00
Thank you for that idea about only presenting one path, that was my plan B
I did read somewhere that power path supported others storage systems such as the ESS 800. That's why I was hoping I could install power path and be able to see multiple paths to each storage system. Can anybody confirm this for me?
How easy is powerpath to install? Are there any special pre-requisites or post installation tasks to do?
Thanks for your time
Mike
dynamox
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March 22nd, 2010 07:00
PowerPath is very easy to install on Windows, it's a standard msi installer. While you are installing Powerpath go ahead and install PowerPath Migrator, it's a free utility from EMC that will allow you to migrate without downtime to other Powerpath supported storage arrays in the future. On the cut-over day, once you remove SDD and install PowerPath, zone remaining paths, you will need to follow these steps:
Open Navisphere Manager and verify you're in the Storage Tab.
Expand the array and then the Hosts section.
Right-click the host you are migrating and click Connectivity Status.
You will see the initiators that need to be added as they will show up in ~management.
Click Reconnect to have them added to the Storage Group.
and this point you can run "powermt display dev=all" and make sure that all paths are listed. If you don't see the new paths you might need to reboot the host.
Message was edited by: dynamox
Brion2
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March 22nd, 2010 07:00
Hi Mike. PowerPath 5.3 SP1 was just released. It doesn't support the IBM ESS 800 for multipathing. You could submit an RPQ through your EMC support representative.
E-Lab Navigator has a wizard that will allow you to enter your configuration parameters to check for support. Also, each month, a new PowerPath support matrix table is published which also has a section on third-party array support. The PowerPath User Guide and Windows Host Connectivity Guide have additional information on installing and configuring PowerPath. Everything you need is here. (See links below)
PowerPath is a straight-forward installation. You will have to reboot after installation. It is recommended that you select "Complete" during the installation process. This will install advanced features including third-party array support.
Hope this helps.
-Brion
https://elabnavigator.emc.com/emcpubs/elab/esm/pdf/EMC_PowerPath.pdf
http://powerlink.emc.com/km/live1/en_US/Offering_Technical/Technical_Documentation/300-008-780.pdf?mtcs=ZXZlbnRUeXBlPUttQ2xpY2tDb250ZW50RXZlbnQsZG9jdW1lbnRJZD0wOTAxNDA2NjgwNGQ0YzdjLG5hdmVOb2RlPVNvZndhcmVEb3dubG9hZHMtMg__
http://powerlink.emc.com/km/appmanager/km/secureDesktop?_nfpb=true&_pageLabel=servicesDocLibPg&internalId=0b014066800ec090&_irrt=true