Toshiba TECRA 9100 Series Maintenance Manual page 138

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 05 Write/Read/Compare (CE)
This subtest writes B5ADADh worst pattern data to the CE cylinder on the
HDD, then reads the data from the CE cylinder and compares it with the
original data.
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 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.
3-28
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
TECRA 9100 Maintenance Manual (960-347)
3.11 Hard Disk Test