Toshiba T3300SL Maintenance Manual page 75

6. The Hard Disk Test will appear after you respond to the Detail Status prompt. Select the
number for the subtest you want to execute and press Enter. The following message will
appear during each subtest.
HARD DISK TEST
SUB-TEST: xx
PASS COUNT: xxxxx
WRITE DATA: xx
ADDRESS: xxxxx
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 code as explained in Table 3-3.
Subtest 01 Sequential Read
This subtest is a sequential reading of all the tracks on the HDD starting at track 0.
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:
Forward sequential
Reverse sequential
Random
Subtest 03 Random Address/Data
This subtest writes random data to random addresses on the HDD cylinder, head, and
sector. This data is then read and compared to the original data.
Subtest 04 Cross Talk & Peak Shift
This subtest writes eight types of the worst pattern data (shown below) to a cylinder,
then reads the data while moving from cylinder to cylinder.
Worst pattern data:
B5ADADh, 4A5252h, EB6DB6h, 149249h
63B63Bh, 9C49C4h, 2DB6DBh, D24924h
xxxxxxx
ERROR COUNT: xxxxx
READ DATA: xx
STATUS: xxx
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