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3 Tests and Diagnostics 3.9 Hard Disk Test
3-26 PORTEGE A100 Maintenance Manual (960-460)
Subtest 01 Sequential read
This subtest is a sequential reading of all the tracks on the HDD starting at track 0
to maximum track. When all the tracks on the HDD have been read, the test starts
at the maximum track and reads the tracks on the HDD sequentially back to track
0.
Subtest 02 Address uniqueness
This subtest writes unique address data to each sector of the HDD track-by-track.
The data written to each sector is then read and compared with the original data.
There are three ways the HDD can be read:
1.Forward sequential
2.Reverse sequential
3.Random
Subtest 03 Random address/data
This subtest writes random data in a random length to random addresses. This data
is then read and compared to the original data.