Here the subvolumes of both sep1-replicate-0 and sep1-replicate-1 are the same. 

Command used - gluster volume create sep1 replica 2 localhost:/tmp/export1 localhost:/tmp/export2 localhost:/tmp/export3 localhost:/tmp/export4

volume sep1-client-0
type protocol/client
option transport-type tcp
option remote-host localhost
option transport.socket.nodelay on
option remote-subvolume /tmp/export1
end-volume

volume sep1-client-1
type protocol/client
option transport-type tcp
option remote-host localhost
option transport.socket.nodelay on
option remote-subvolume /tmp/export2
end-volume

volume sep1-client-2
type protocol/client
option transport-type tcp
option remote-host localhost
option transport.socket.nodelay on
option remote-subvolume /tmp/export3
end-volume

volume sep1-client-3
type protocol/client
option transport-type tcp
option remote-host localhost
option transport.socket.nodelay on
option remote-subvolume /tmp/export4
end-volume

volume sep1-replicate-0
type cluster/replicate
#option read-subvolume on
#option favorite-child on
#option background-self-heal-count on
#option data-self-heal on
#option data-self-heal-algorithm on
#option data-self-heal-window-size on
#option metadata-self-heal on
#option entry-self-heal on
#option data-change-log on
#option metadata-change-log on
#option entry-change-log on
#option strict-readdir on
subvolumes sep1-client-0 sep1-client-1 
end-volume

volume sep1-replicate-1
type cluster/replicate
#option read-subvolume on
#option favorite-child on
#option background-self-heal-count on
#option data-self-heal on
#option data-self-heal-algorithm on
#option data-self-heal-window-size on
#option metadata-self-heal on
#option entry-self-heal on
#option data-change-log on
#option metadata-change-log on
#option entry-change-log on
#option strict-readdir on
subvolumes sep1-client-0 sep1-client-1 
end-volume

volume sep1-dht
type cluster/distribute
#option lookup-unhashed on
#option min-free-disk on
#option unhashed-sticky-bit on
subvolumes sep1-replicate-0 sep1-replicate-1 
end-volume

volume sep1-write-behind
type performance/write-behind
#option flush-behind on
#option cache-size on
#option disable-for-first-nbytes on
#option enable-O_SYNC on
#option enable-trickling-writes on
subvolumes sep1-dht
end-volume

volume sep1-read-ahead
type performance/read-ahead
#option force-atime-update on
#option page-count on
subvolumes sep1-write-behind
end-volume

volume sep1-io-cache
type performance/io-cache
#option priority on
#option cache-timeout on
#option cache-size on
#option min-file-size on
#option max-file-size on
subvolumes sep1-read-ahead
end-volume

volume sep1-quick-read
type performance/quick-read
#option priority on
#option cache-timeout on
#option cache-size on
#option max-file-size on
subvolumes sep1-io-cache
end-volume

volume sep1-stat-prefetch
type performance/stat-prefetch
subvolumes sep1-quick-read
end-volume