Toshiba Satellite P20-25 Series Maintenance Manual page 106

3.16 HDD R/W Test 3. Tests and Diagnostics
NOTE: Press "Ctrl + Break" keys can terminate the current subtest.
The screen should display as previous picture, indicating whether the subtest is passed or
failed when finished.
NOTE: The AC adaptor should be connected to successfully run this test.
Satellite P20-25 Series Maintenance Manual 3-23