Re: SAN to SAN migration

Hey Cliff,

You have a couple options I can think of off the top of my head..

1) In the windows world robocopy is often used for moves/migrations similar to what you're doing. You've probably heard of it, but the main benefit is that it can perform an incremental copy after you've one your first full sync/copy. So the methodology would be to run robocopy while the source LUN is in production and copy all of the data over (first pass). Sometime later when you decide to do the actual cutover, stop all access to the first LUN/volume then run the same robocopy command again and it'll only copy over the changed/added files. See the guide for robocopy as there are a lot of options.

2) Using a file/volume level replication tool, options are EMC's replistor, NetApp's Topio, or NSI Doubletake. All of these products basically behave similarly. They'll let you replicate at the filesystem level from one system to another and in most cases within the same system (you'll have to check limitations for each vendor)

You wont be able to perform a real block level copy because the LUN is partitioned by the OS so you'll need to use a filesystem level tool. Check out robocopy though, it's pretty much the standard for moving/migrating data cheaply and easily in the windows world.

Hope that helps or at least gives you some more avenues to explore!

-Anthony

snapbean wrote:
Any help here would be greatly appreciated...I'm in an unusual
scenario with this migration. I have a LUN that was partitioned into
2 drive G: and H: . I need to migrate these 2 drives to 2 new
Seperate LUNS on a new SAN. The issue turns out to be that since the
current LUN is partitioned most apps don't want to make it easy
because I'm not really doing a LUN to LUN migration. Xcopy will work
but takes a terribly long time b/c of the files on the LUNs are so
many, 1000's of small files in many directories and it takes much
time. Does anyone have any ideas on a block level app possibly that
will let me choose G: to a new LUN and then H: to a new LUN??

THANKs

Cliff


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