Ok guys, do not worry and have some rest :-) I talked to an EMC VMAX guru and now, the issue is gone. Regards
Hi,  I have a question regarding a weird SRDF solution. I have 4 VMAX, 2 on 2 sites at a SRDF/S distance (10km).  Production is only on site1, on 1 VMAX, site 2 is a remote site with no production.  Production moves to site2 if site1 goes offline.  Is this do-able ? (please, do not ask why we need 4 VMAX and not only 3 as regular SRDF/S Concurrent solution)   Site 1                                                         Site 2  VMAX2 R2                                                 VMAX4 R2  |                                                                   |  |                                                                   |  | srdf/s                                                         | srdf/a adaptive copy mode ??  |                                                                   |     VMAX1 R11 ------------------- VMAX3 R2 --> R1                 srdf/s                                     ??  What sould I put instead of the question marks in the schema so that I have an 'all synchronous' solution (or near one)?      - is it possible to use the R2 on site 2 (VMAX3) as a R21 so I can do a SRDF/S on site2 to the other R2 (VMAX4) ?      - must I use TF/Snap or clone on site2 before establishing a new pair with a SRDF/A replication on site2 ?  The idea behind it, would bein case of a site1 failure, to resume production on site2 (and always have a synchronous copy on the same site), to establish a new R11/R2 pair on site2, and then a new R2 on site1 when it goes back online.  Site1 would become production site again after a manual intervention to rebuild pairs as described in the schema.  Thanks for any odea or any help since 4 sites solutions are not documented... but may be rare or useless (but I must use 4 VMAX...)
2 sites, 4 VMAXs - SRDF topology question