Page 44 on EMC Solutions Enabler Symmetrix Array Controls CLI V7.6 Product Guide  create dev count=n, size=n [MB |GB | CYL], emulation=EmulationType, config=DeviceConfig, [, data_member_count=nn] [, remote_config=DeviceConfig, remote_data_member_count=nn, ra_group=n, [remote_mvs_ssid=nnn], [dynamic_capability=[dyn_rdf | dyn_rdf1_only | dyn_rdf2_only]] [, mvs_ssid=nnn]  Specifying dyn_rdf will make the device srdf capable and can be used as both R1 or R2 device.
I am sorry, if you feel this is a very basic question. When I run symdev list -r1, it will list all devices with R1 type. How are these devices created?  Are following steps to create R1 deivce: symdg create -type RDF1 myrdfgrp symld -sid 123 -g myrdfgrp add dev 087 DEV087 then after that, dev 087 will become R1 type? If yes, then what is the reason behind that when I run symdev show 087, it will not tell me the group name "myrdfgrp"?  Thank you!
How a device with SRDF R1 type is created?