This process can be used when you want to copy the existing LUN to another volume without disrupting the existing volume.
Use cases for ndmpcopy
You can migrate data from
the source path to a destination path on the same storage system or to a
different destination path on a remote host. You can also migrate data
from a source path on a remote host to a destination path on the same
host or to a destination path on a remote host.
below command is used to copy the Lun from Source filer to Destination Filer
NetAppFiler>ndmpcopy -sa username:password -da username:password
myhost:/vol/vol0/source_path myhost:/vol/vol0/destination_path
NetappFiler>ndmpcopy /vol/vol0/SrcLun /vol/vol2/DstLun
Enjoy....
Good blog
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