SECRETS_DEV=$1
 PATH_SOURCE=/media/${SECRETS_DEV}/${PATH_REL_SECRETS}
 PATH_DEV=/dev/${SECRETS_DEV}
+PATH_PMOUNT_ERR="/tmp/err_pmount_$(date +'%s')"
 echo "Put secrets drive into slot for ${PATH_DEV}."
 while [ ! -e "${PATH_DEV}" ]; do
     sleep 0.1
     PASSPHRASE=$(get_passphrase)
     echo ''
     set +e
-    echo "${PASSPHRASE}" | pmount "${PATH_DEV}"
+    echo "${PASSPHRASE}" | pmount "${PATH_DEV}" 2> "${PATH_PMOUNT_ERR}"
     RESULT=$?
     set -e
     if [ "${RESULT}" = "0" ]; then
         break
     elif [ "${RESULT}" != "100" ]; then
-        echo "Aborting due to pmount error."
+        echo "Aborting due to pmount error:"
+       cat "${PATH_PMOUNT_ERR}"
+       rm "${PATH_PMOUNT_ERR}"
        exit 1
     fi
 done