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SAN to SAN migration
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 |
#2
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SAN to SAN migration
"snapbean" wrote in message
ups.com... 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 Have you considered setting up a software mirror between the old LUN and the new LUN, then later once it's in sync break the mirror again by removing the old LUN? Rob |
#3
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SAN to SAN migration
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 Hi Cliff! Sorry i am not a windows professional, but did u try some consumer products like partition magic, ghost, hdcopy, ...? I typical use the dd command from linux to copy one partition to an other one (dd doesnt care about the content of a partition). But you could have troubles to boot with linux (eg. live cd) and get your luns proper mapped. Not every hba was recognized at linux. with best regards Dieter Stumpner |
#4
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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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