Automatic Diagnostic Repository is also present at the cell node of Exadata database machine. You have to set the ADR Base in V2, and then you can show and select the ADR homes to manage the diagnostic data.
[root@cell1-n0 ~]# adrci
adrci> set base /opt/oracle/cell/log
adrci> show homes
adrci> set home diag/asm/cell/cell1
adrci> show tracefile