Toshiba Satellite Pro U300 Maintenance Manual - Page 145

Test Program for Field. 3.9 Hard Disk Test To execute the Hard Disk Test select 06 from the Diagnostic Test Menu, press Enter and follow the directions on the screen. The Hard Disk Test contains eight subtests that test the functions of the hard disk drive. Move the highlight bar to the subtest you want to execute and press Enter. NOTES: The contents of the hard disk will be erased when subtest 02, 03, 04, 05, 07 or 08 is executed. Before running the test, transfer the contents of the hard disk to other disk. A password is necessary to execute the Hard Disk Test. The password is: hard disk Subtest 01 Sequential Read This subtest sequentially reads all the tracks on the HDD starting at track 0. When all tracks have been read, the test starts at the maximum track and reads sequentially back to track 0. Subtest 02 Subtest 03 Address Uniqueness (This subtest need very long time) This subtest writes unique address data to each sector of the HDD track-bytrack. The data written to each sector is then read and compared with the original data. There are three ways the HDD can be read: • Forward sequential • Reverse sequential • Random Random Address Data This subtest writes random data to 1000 different random addresses on the HDD. This data is then read and compared to the original data. Satellite U300 and Satellite Pro U300 Tests and Diagnostics Manual 41