Toshiba P11 Personal Computer User Manual


 
Tests and Diagnostics
3-166 [CONFIDENTIAL] TECRA A11/S11/P11/Satellite Pro S500 Series Maintenance Manual (960-784)
3.35.6.6 Hard Disk Test
1) Sequential read
This subtest performs a forward read operation (0 to Maximum) by 63 sectors.
2) 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.
Forward sequential
Reverse sequential
Random
3) 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.
4) 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. (Test the data interference in the neighbor
track)
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