This is documented in the Solutions Enabler SRDF CLI guide,  Note: Depending on the type of file system and attached host, certain host-dependent operations may be required to access data migrated to a larger R2 device.  
Hello, IHAC that moved from 39322 cyl hypers on DMX3/4s to 39324 cyl on VMAXs. Can we migrate the old hypers (and metas) to the new ones using SRDF seamlessly or is their host remediation required ? Or are their any other known issues using SRDF for migration in such a scenario ? Thanks, Girish
SRDF Migration - Larger R2