How to Migrate Data from An Old SAN to a New SAN

Posted on 2009-04-20
Last Modified: 2013-11-14
We are upgrading our SAN from an AX150 to an HP MSA2212C. The current SAN stores our e-store data -- orders, shipping, and so forth. I know there will be at least a brief outage when we cut over the old SAN to the new one.

I've never done a SAN migration before. It seems as though it should be as simple as installing the new SAN, bringing it online, and copying data from one SAN to the other. I'm guessing that's not the case, however.

What are the best ways to copy the data from the old SAN to the new SAN, and then bring the new SAN online? I want to minimize system downtime.
Question by:michaelknowles
    LVL 7

    Accepted Solution

    due by different product, I believe you can do only copynìing data server-side.

    Take in mind that you have also to switch also the server connection:
    1) suppose you have user downtime
    2) in any mode, you copy data from SAN1 to SAN2
    (suppose srv1<->SAN1, srv2<->SAN2, where srv2 ha not application, but
    just copies data lan-shared by srv1 to SAN2.
    3) told that applications (if any) are on srv1, once data is copied,
    you have to swap srv1 from SAN1 to SAN2.

    This is the general problem. The optimal solution depends from how many servers are attached to the SAN, and which applications pik the data:
    just file share, DB one, any other.

    Probably you may have the need to build a "Service" server (smallest)
    during migration, to continue to give service to the user:

    * srv1-SAN1
    * setup dummySrv, wire to SAN2, stop users (night!?), copy data
    * leave that dummySrv serves users
    * users update data on SAN2 by dummySrv
    (if dummySrv is newer and better than srv1, procedure can halt here)
    * setup connection between srv1 and SAN2
    * test
    * release srv1 to users.

    LVL 9

    Assisted Solution

    apart from above info, you can also check below document which can be handy, this doc talks about general SAN migration and few releates to qlogic environment.

    LVL 7

    Expert Comment

    thank for your feedback: when you have time,
    we could be interested about way you will approach the problem,
    or which part of our posts did useful in your situation.


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