## Storage Device Driver Reference

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### Test-Case Execution

Test case scripts are driven by the DDTT. The DDTT can be initiated via an OS/2 command line or from a batch file or REXX statement:

       [C:\TOPTICAL]DDTT OPTISTD.SCR

The DDTT creates a Presentation Manager thread window that consists of:

a multi-line, scrolled output field for logging script progress

a single-line entry field for operator input

a single-line text output field for script-initiated prompts and messages

The DDTT optical tests must be executed on a directly-attached optical device. These tests will not work when executed against an optical device accessed by way of a network connection.