How to restore a device group?
symdg -sid 1234 import mydg -f mydgfile.txt
Create mydg from the file mydgfile.txt which created earlier using export option.
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symdg delete mydg -forceDelete device group mydg.
symdg create mydg -type rdf1Create device group mydg of rdf1 type .
symdg -sid 1234 listList device groups which include the devices from array 1234.
symdg rename mydg yourdgRenames the mydg to yourdg.
symdg -g MyDg remove ld DEV002Remove logical device DEV002 from device group MyDG.