Using pg_upgrade to upgrade from postgreSQL 9.1.6 with Postgis 2.1.1 to PostgreSQL 9.3.0 with Postgis 2.1.1

Does anyone know why I'm getting the following error.

thanks


Performing Upgrade
------------------
Analyzing all rows in the new cluster                       ok
Freezing all rows on the new cluster                        ok
Deleting files from new pg_clog                             ok
Copying old pg_clog to new server                           ok
Setting next transaction ID for new cluster                 ok
Setting oldest multixact ID on new cluster                  ok
Resetting WAL archives                                      ok
Setting frozenxid counters in new cluster                   ok
Restoring global objects in the new cluster                 ok
Adding support functions to new cluster                     ok
Restoring database schemas in the new cluster
                                                            ok
Removing support functions from new cluster                 ok
Adding ".old" suffix to old global/pg_control               ok

If you want to start the old cluster, you will need to remove
the ".old" suffix from /sars/apps/db/data/global/pg_control.old.
Because "link" mode was used, the old cluster cannot be safely
started once the new cluster has been started.

Linking user relation files
  /sars/apps/db/data/sar_data/PG_9.1_201105231/29304/34537 
error while creating link for relation "public.sars_mod_cluster" ("/sars/apps/db/data/sar_data/PG_9.1_201105231/29304/34537" to "/sars/apps/db/data/sar_data/PG_9.3_201306121/16427/34537"): No such file or directory
Failure, exiting