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3 Tests and Diagnostics 3.9 Hard Disk Test
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 (to check
the data interference in the neighbor track) to compare. After the third pass, it
tests the motor-off function (HDD motor is turned off, stops for 20 minutes
and is turned on).
Worst pattern data Cylinder
‘B5ADAD’ 0 cylinder
‘4A5252’ 1 cylinder
‘EB6DB6’ 2 cylinder
‘149249’ 3 cylinder
’63B63B’ 4 cylinder
‘9C49C4’ 5 cylinder
‘2DB6DB’ 6 cylinder
‘D24924’ 7 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 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.
3-24 PORTEGE R100 Maintenance Manual (960-440)