Well migrating luns on the same array is easy.  1  Create new lun of equal or bigger size 2  Right click source lun and select "Migrate"  Select new lun 3  Set a migration speed. This uses Storage processor CPU so if your systems are using hi I/O, better to start at a lower speed.  It just might take along time. 4  When it finishes, the new lun assumes the disk signature of the old one so you don't have to do nothing on the host unless you migrated to a bigger lun.  If so, you will have to use diskpart (windows) to extend the lun so the OS see's all the space.  As for migrating to other arrays,  there are so many products out there that i dont have the time to explain each one.  Some of them are SanCopy, Mirrorview, Open Migrator, PowerPath Migration Enabler.  I am sure there are more i cant think of.  I can see that you recently posted a bunch of questions and it sounds like you might be sort of new to EMC array's? If that is the case, at the top of the Clariion forums is a tab for "Documents".  There is a lot of good information in those documents and they can answer pretty much all the questions you asked.  I would recommend that you read some of them and if you still have questions, then come back and ask.    This commutiy is very responsive and always willing to assist other members:)  Thanks
Can you please tell me the step by step procedure for LUN migration 1. Precautions to take or precheck list before go for LUN migration. 2. precautions to take while LUN migration process. 3. Post check list for after LUN migration.
Clariion LUN migration