User Guide

3 chTests and Diagnostics 3.12 Hard Disk Test
4. Select the number of the subtest you want to execute and press Enter. The
following message will appear.
HARD DISK TEST IN PROGRESS XXXXXXX
SUB-TEST :XX
XXX DIAGNOSTIC TEST VX.XX
[Ctrl]+[Break] ;test end
[Ctrl]+[C] ;key stop
PASS COUNT:XXXXX ERRORCOUNT :XXXXX
WRITE DATA:XX READ DATA :XX
ADDRESS :XXXXXXXX STATUS :XXX
The first three digits of the ADDRESS indicate which cylinder is being tested, the
fourth digit indicates the head and the last two digits indicate the sector.
The first digit of the STATUS number indicates the drive being tested and the last
two digits indicate the error status code as explained in Table 3-2.
Subtest 01 Sequential read
This subtest reads sequentially all the track data on the HDD starting at
track 0 (forward reading). When all the tracks on the HDD have been read,
the test reads the maximum track data and continuous to read the track
data on the HDD sequentially back to track 0 (reverse read).
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:
• Forward sequential
• Reverse sequential
• 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.
3-30 Satellite A50/TECRA A2 Maintenance Manual (960-478)