Topic:
Can successfully segy dump on an SGI, but data load fails with errors.

Description:
Able to segy dump a tape on the SGI, but unable to load the data.
Data load fails with error message:
 'Expected 3200 bytes in segy header, found 400.
  Non standard segy sample format code
  Override input trc/rec was 0; now is 1
  Err Invalid input data format -1
  Error with line header parameters  
  Status = -1, ffff'.

Solution:
1.) Execute the sili command in an xterm window:
      mt -f /dev/devicename sili

    The sili command is a command that suppresses the illegal length indicator. 
    This occurs with tapes on a 8 mm tape drive when a request is made to read
    fewer bytes per block than were written.  This persists until explicitly
    turned off or the tape is changed.

2.) If the problem continues, there is a runaway daemon known as mediad which
    needs to be stopped.  Mediad monitors removable devices such as CDROMs, tape
    drives, and diskettes.  

    In an xterm window:
    ps -ef | grep mediad
    kill -9 process# (associated with mediad)
 
3.) Restart load.
 



Last Modified on: 02-DEC-98