Toshiba Satellite A40 Series Maintenance Manual page 148

3.10 Hard Disk Test
Subtest 07 Read specified address
This subtest reads data, which 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.
Satellite A40 Maintenance Manual (960-458)
3 Tests and Diagnostics
3-27