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3.9 Hard Disk Test 3 Tests and Diagnostics
PORTEGE A100 Maintenance Manual (960-460) 3-27
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.