Toshiba Tecra A2-S139 Maintenance Manual - Page 139
Hard Disk Test, Tests and Diagnostics
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3.12 Hard Disk Test 3 Tests and Diagnostics Subtest 04 Subtest 06 Subtest 07 Subtest 09 Subtest 10 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 (to check the data interference in the neighbor track) to compare. 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. Read specified address This subtest reads data from a specified cylinder and head on the HDD. Sequential write This subtest writes specified 2-byte data to all of the cylinders on the HDD. 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. Satellite A50/TECRA A2 Maintenance Manual (960-478) 3-31