Direct, simple SQL query results in "ORA-01406: fetched column value was truncated"
From what I’ve found, there is a special character in the label on the instance that doesn't work and throwing the error.
Instance causing issues
SQL&gt; SELECT ASMNAME_KFDSK, FAILNAME_KFDSK, LABEL_KFDSK FROM x$kfdsk;

ASMNAME_KFDSK                  FAILNAME_KFDSK                 LABEL_KFDSK
------------------------------ ------------------------------ -------------------------------
DG01_DATA_0000                 DG01_DATA_0000                 ▒▒▒▒▒u▒▒▒▒▒
DG01_DATA_0001                 DG01_DATA_0001

Instance working fine (From the +ASM instance)
SQL&gt; SELECT ASMNAME_KFDSK, FAILNAME_KFDSK, LABEL_KFDSK FROM x$kfdsk;

ASMNAME_KFDSK                  FAILNAME_KFDSK                 LABEL_KFDSK
------------------------------ ------------------------------ -------------------------------
DG01_DATA_0000                 DG01_DATA_0000

ASM Provisioning String Has Junk Characters &quot;kfdhdb.driver.provstr:ORCLDISKÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ &quot; ( Doc ID 2088023.1 )