Home > Storage > PowerMax and VMAX > Data Protection > Dell PowerMax and VMAX All Flash: SRDF/Metro Overview and Best Practices > Environment definition
Each Metro Smart DR environment is uniquely identified by an Environment Name which is composed of the 3 arrays (MetroR1 array, MetroR2 array, DR array) and associated SRDF groups and devices for each array. All arrays contain the same number and size of devices. All device pairings form a triangle across the three arrays taking part in the Smart DR environment. This environment name can be up to 16 characters long, is case-sensitive and may include alpha numeric characters and the dash (‘-‘) and underscore (‘_’).
MetroR1 array contains:
MetroR2 array contains:
DR array contains: