Toshiba A20-S259 - Satellite - Pentium 4 2.66 GHz Maintenance Manual page 142

3 Tests and Diagnostics
Subtest 04 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.
Subtest 06 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
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
Satellite A20 Maintenance Manual (960-444)
3.9 Async Test