Toshiba T4400SXC Maintenance Manual page 57

6. During the hard disk test, the following message will appear:
HARD DISK TEST
SUB-TEST XX
PASS COUNT: XXXXX
WRITE DATA: XX
ADDRESS XXXXX
XXXXXXX
ERROR COUNT: XXXXX
READ DATA XX
STATUS XXX
The first three digits of the ADDRESS number are the cylinder number being
tested, the fourth digit is the head number and the last two digits are the sector
number. The first digit of the STATUS number is the drive number being tested
and the last two digits are the error status code.
Subtest 01 Sequential Read
The sequential read test is a sequential reading of all the tracks on the HDD
starting at track O. 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 O.
Subtest 02 Address Uniqueness
The address uniqueness test 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
The random address/data 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 & Peek Shift
This subtest writes eight types of 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
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