Toshiba A20-S259 Maintenance Manual - Page 142
Tests and Diagnostics, Async Test, Cross Talk & Peak Shift
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3 Tests and Diagnostics 3.9 Async Test Subtest 04 Subtest 06 Cross Talk & Peak Shift This subtest writes eight types of worst pattern data (listed below) to a cylinder, then reads the data while moving from cylinder to cylinder. Worst pattern data 'B5ADAD' '4A5252' 'EB6DB6' '149249' '63B63B' '9C49C4' '2DB6DB' 'D24924' Cylinder 0 cylinder 1 cylinder 2 cylinder 3 cylinder 4 cylinder 5 cylinder 6 cylinder 7 cylinder Write Specified Address This subtest writes specified data to a specified cylinder and head on the HDD. Subtest 07 Read Specified Address This subtest reads data that has been written to a specified cylinder and head on the HDD. Subtest 09 Sequential Write This subtest writes specified 2-byte data to all of the cylinders on the HDD. Subtest 10 W-R-C Specified Address This subtest writes data to a specified cylinder and head on the HDD, then reads the data and compares it to the original data. 3-30 Satellite A20 Maintenance Manual (960-444)
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