## Storage Device Driver Reference

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### Overview

DASD functional verification tests exercise the Application Program Interfaces (APIs) - mainly DosDevIOCtl variations - that interface with DASD device drivers. The test environment is defined by the Device Driver Test Tool (DDTT) and each test is written as a DDTT script using Global and DASD grammars. See Device Driver Test Tool (DDTT) for a description of the DDTT. The tests described herein give the user a repeatable set of scripts for verifying disk and diskette functions. They may also be used as examples for creating additional specialized test cases.

As the DDTT parses and executes each test script, it simultaneously creates a disk log file that timestamps the activity and logs each script command. If the command initiates an API call, then the result of the command is logged, be it failure with a return code or success with possible returned data. If the script fails to complete, the log, up to the point of failure, is available for diagnosis.

These tests can be used to verify correct interaction between the DASD device and the following OS/2 components:

DOSDevIOCtl API interface

FAT and HPFS file systems

OS2DASD.DMD, OS2SCSI.DMD and OS2ASPI.DMD device managers

SCSI Adapter device drivers

Non-SCSI Adapter device drivers