What is EMC Clariion SnapView Clones ?

EMC Clariion SnapView Clones are full copies of the Source LUN, built on a LUN which has already been bound. That LUN must therefore be the same size as the Source.Clones provide users with the ability to create fully populated point-in-time copies of LUNs within a single array.Clones are packaged with SnapView, as of Version 2.0, and expand SnapView functionality by providing the option to have fully-populated copies (as well as the pointer-based copies of SnapView).For users familiar with MirrorView, Clones can be thought of as mirrors within arrays, as opposed to across arrays. Clones have additional functionality, however, in that they offer the ability to choose which direction the synchronization is to go between source and clone; and also, Clones are available for read and write access (when fractured), unlike secondary mirrors, which have to be promoted (or made accessible via a Snapshot) to allow for data access.

For users familiar with the Symmetrix product line, Clones can be thought of as Business Continuation Volumes (BCVs).Because Clones are fully-populated copies of data, they are highly available, and can withstand SP or array reboots or failures, as well as path failures (provided PowerPath is installed and properly configured).It should be noted that Clones are designed for users who want the added functionality of being able to periodically fracture the LUN copy, and then to sync or reverse sync the copies back together. Users who simply want a mirrored copy would likely implement RAID 1 LUNs. Clones are full copies of the data. This implies that we need 100% of the disk space of the Source, and that a Clone is independent of the Source once synchronization is complete.