Creating custom algorithm

Algorithm definition

The Algorithm definition step shows you a template of the future algorithm.

The table has the following legend:

• The first column contains the type of operation (to write a symbol to disk; and to verify written).
• The second column contains the pattern of data to be written to disk.

Each line defines an operation that will be performed during a pass. To create your algorithm, add as many lines to the table that you think will be enough for secure data destruction.

To add a new pass:

1. Click Add. The Wiping Pass Adjustment window opens.

2. Choose an option:
   • Write pattern

     Enter a hexadecimal value, for example, a value of this kind: 0x00, 0xAA, or 0xCD, etc. These values are 1 byte long, but they may be up to 512 bytes long. Except for such values, you may enter a random hexadecimal value of any length (up to 512 bytes).

     If the binary value is represented by the 10001010 (0x8A) sequence, then the complementary binary value will be represented by the 01110101 (0x75) sequence.

   • Write a random number

     Specify the length of the random value in bytes.

   • Write complementary to previous pass pattern

     Acronis True Image adds a complementary value to the one written to disk during the previous pass.

   • Verify

     Acronis True Image verifies the values written to disk during the previous pass.

3. Click OK.

To edit an existing pass:

1. Select the corresponding line, and then click Edit.

   The Wiping Pass Adjustment window opens.

   Note: When you select several lines, the new settings will be applied to all of the selected passes.

2. Change the settings, and then click OK.

Saving algorithm to a file

To save the created algorithm to a file in order to use this algorithm afterwards:

1. On the Saving custom algorithm step, select Save to a file, and then click Next.
2. In the window that opens, specify the file name and location, and then click OK.