you will need to delete SRDF relationship between the two devices and then expand using the protect_data option (BCV has to be 2-way mirror)  [URL]
Hello,  i have a meta Raid 5 R1 on a Vmax and another meta Raid 5 R2 on another Vmax. Meta R1 is mapped and masked on a windows host.  So I want to upgrade meta stripe online (R1 and R2 or R1 then R2)...  Is it possible ? How to do that by Symcli commands ?  When i use the command symconfigure with file described below form meta from dev 118, config=striped;add dev 2AB to meta 118;add dev 2AC to meta 118;add dev 2AD to meta 118;  =>  i have the error that meta 118 must be unmasked or unmapped....  Regards
Vmax Meta R1/R2 expand meta stripe Online