AIO Library Error on attempted startup (UNIX)

Any Ideas on the following problem……………

Attempting to increase our SGA to 1.5 GB on our Digital UNIX 4.0e system

When I issue the initial startup I receive the following:

       connect internal
       startup pfile=$D_ORA_DB/pfile/initd_0.ora nomount

       Internal AIO consistency error:  Cannot initialize aio library.
       Error 35: (null)
      Aborting...

This causes a trace file to be printed and a CORE dump to be produced. The CORE dump does not reveal much. I sent the dump information to Oracle support but they did not find anything. The following is our configuration:

Our AS 8400 is configured with:

              5/625 Dual Processor
              Digital UNIX v4.0e
              3.5 GB of Memory
             (18) 9.1 GB Disks (RAID 7000)

Oracle Pfile parameters:
      db_files = 80
      db_file_multiblock_read_count = 16
      db_block_buffers = 114627
      shared_pool_size = 25470760
      log_buffer = 655360
      log_checkpoint_interval = 17000
      processes = 100
     dml_locks = 400

     sequence_cache_entries = 30
     max_dump_file_size = 20480
     sort_area_size    =40485760
     open_cursors      =   600

db_block_size                   = 12288

Our current UNIX Subsystem Parameters for Oracle8 are set as:

    ipc:

        shm-max=2139095040
        shm-mni=128
        shm-seg=32
        msg-mni=1024
        msg-tql=4096
        msg-mnb=16384

    dlm:
        dlm_disable_grptx=0

    vm:
        vm-mapentries=400
        vm-maxvas=3758096384

        ubc-minpercent=1
        ubc-maxpercent=2

    proc:
        max-proc-per-user=1024
        max-threads-per-user=1024
        max-per-proc-data-size=3758096384
        max-per-proc-address-space=3758096384

     rt:
         aio-max-percent=2
         aio-max-num=512