DOS Command Line Mode

This section describes running Active@ ERASER in Command Line mode

Follow these steps:

  1. With the PC power off, insert the Active@ ERASER floppy disk into drive A:
  2. Start the PC by turning on the power. The screen will display the Microsoft DOS prompt.
  3. At the DOS prompt, display Active@ ERASER parameters by typing:
    A:\>hderaser -?

    A list of parameters will be displayed. Explanations of the parameters can be found in the table on the following page.
  4. Command Line Parameters:

    Parameter Default Options
    no parameter   With no parameter, the DOS Interactive screens will appear.
    -erasemethod=[0-6] 0 0 — One pass zeros (quick, low security)
    1 — One pass random (quick, low security)
    2 — US DoD 5220.22-M (slow, high security)
    3 — German VSITR (slow, high security)
    4 — Russian GOST p50739-95 (slow, high security)
    5 — Gutmann (very slow, highest security)
    6 — User Defined Number of Passes (random)
    -passes=[1 - 99] 1 Number of times the write heads will pass over a disk area to overwrite data. Valid only if erasemethod = 6.
    -verification=[1 - 100] 40 After the data erasing process is complete, the utility reads the disk space to verify that the actions performed by the write head comply with the chosen erasemethod (reading 40% of the area by default). It is a long process. Set the verification to the level that works for you.
    -retryattempts=[1 - 99] 5 When the drive write head encounters an error in the sector, the utility will retry to write in the sector 5 times by default.
    -erasehdd=[80h - 83h]   By default, the utility will erase the first logical drive encountered. Use this parameter to direct the erasing procedure to the correct target.
    -ignoreerrors ON By default, the erasing process will stop each time a disk error is encountered. You have the option to continue erasing or to stop the process and deal with the error. When this parameter is used, all errors are ignored.
    -clearlog ON When a drive is erased, a log file is kept. By default, this log is cleared at the start of the erasing process. The log file is stored in the same folder where the software is located.
    -noconfirmation ON Skip confirmation steps before erasing starts. By default, confirmation steps will appear in command line mode for each hard drive or floppy as follows: Are you sure?
    -test   If you are having difficulty with Active@ ERASER , use this parameter to create a hardware info file to be sent to our technical support specialists.
    -eraseallhdds Erase all detected hard disk drives
    -help
     or
    -?
    Display this list of parameters.
  5. Key the command and parameters into the DOS screen at the prompt. Here is an example:
    A:\>hderaser -eraseallhdds -erasemethod=6 -passes=7
    -noconfirmation

    In the example above, data on all hard drives will be erased in seven passes without user confirmation.
  6. Press [Enter] to complete the command and start the process.
    After operation has completed successfully information on how drives have been erased is displayed on the screen, similar to the message in Figure 3-8, above.
Microsoft certified for Active@ ERASER