Request to suggest best method to migrate data

Hi All,

  I have a scenario where I need to migrate a huge data ( x TB ) from source to target as mentioned below.

     Source :  It has SAN environment where huge data ( x TB) is mapped to a windows host and the storage used is DMX4. (Production enviroment)

    Target : It has NAS environment (Datamovers) and storage used is VMAX.

Can any one please suggest the best and fastest way that we can migrate the data from source to destination.

I thought of below options. please correct me if iam wrong and please add more.

1.  From target use CIFS and map the share on to the source windows host machine and do copy and paste of the data.

2.  From target use CDMS and establish the connection to source windows machine and do a migrate using CDMS options.

   But as the above two approches are file level copy the time taken to do the migration of x TB will take days or weeks.

Is there any way that we can do a block level copy from source DMX4 to target VMAX and then map the luns to the host using the datamovers. I think we can do block level copy of data from source to destination but not sure if NAS datamovers will recognize the data on the target side.

please suggest the best and fastest way that we can migrate the data.

Thanks,

Prakruth