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August 25th, 2014 12:00

Steps needs to be taken before moving the luns from one storage group to other without any data loss or server panics

what are the Steps needs to be taken before moving the luns from one storage group to other without any data loss or server panics?

9 Legend

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20.4K Posts

August 25th, 2014 13:00

i see, makes sense. You will need to figure what LUNs belong to what application/volume group and move them at once. Let's say i have an Oracle database that uses LVM (logical volume manager). You will need to figure out what LUNs make up that volume group, shutdown the database, unmount the file system, export volume group from the old server, move LUNs from old storage group to new storage group, rescan/reboot new server, import volume group on the new server, mount file system, start database.

9 Legend

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20.4K Posts

August 25th, 2014 12:00

what server OS /application ?

8 Posts

August 25th, 2014 12:00

we are moving data on the old server that is on clariion to the new server on Vblock. Linux team is making a test to move this data. New server has some other applications that are not on the old server.

8 Posts

August 25th, 2014 12:00

Server is Linux. not sure about the application. can you provide the best practices for all the OS that you know?

9 Legend

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20.4K Posts

August 25th, 2014 12:00

so if you are moving between an old clariion to a vBlock (assuming EMC array as the backend). Don't you need to replicate the LUNs to the vBLock first ?  I was assuming you are trying to move LUNs between storage groups on the same array.

9 Legend

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20.4K Posts

August 25th, 2014 12:00

Moving a LUN from one storage group to another is disruptive. On Unix/Linux you will first need to determine if that LUN is part of a volume group. If it is you can't just move an individual LUN, you would need to move all LUNs that comprise that volume group. What is the purpose of this move ?

8 Posts

August 25th, 2014 13:00

Linux team is not copying any data to the Vblock. They just wanted to map the luns from the clariion array(old server) to the new server. Data still sits on the clarrion array.so we need to create a new storage group and add the required luns to the new storage group. we are not migrating any data. I am sorry for not explaining this in my previous post.

8 Posts

August 25th, 2014 14:00

Thanks for the help. what if we need to move on a windows sql box? is the procedure same?

9 Legend

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20.4K Posts

August 25th, 2014 14:00

pretty much minus the volume manager (hopefully you are not using Veritas Storage Foundation for Windows or spanning disk volumes)

8 Posts

August 28th, 2014 10:00

Do you have a command to find the storage groups a lun belongs to on a clariion?

for symmetrix we have symaccess -sid xxxx list -type storage -dev xxxx 

9 Legend

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20.4K Posts

August 28th, 2014 11:00

you will need to do some scripting, naviseccli is more than a decade old and still is as crappy as it was 10 years ago.

naviseccli -address   storagegroup -list

2 Posts

February 15th, 2015 13:00

This may be a late answer , the below Navicli command will give the storagegroup membership of any LUN


#naviseccli -h ip getlun #lunno | grep -i "lu storagegroup\:"

2 Posts

February 15th, 2015 13:00

This may be a late answer to your post,

The LUNs can be shared across multiple storage groups and in your case your existing server LUNS can be added in to new server storage group.

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228 Posts

February 16th, 2015 03:00

Curious to know how it went.
Ramnav , can you update us with the outcome of this?

8 Posts

February 17th, 2015 11:00

We have created new storage group and added luns to the new storage group bringing down the databases. Linux team rescanned the devices on new server.

Thanks all for the help.

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