Toshiba T200, Руководство пользователя

Страница: 76 / 180

3-26
T200, T200CS
The first three digits of the ADDRESS indicate the cylinder 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 3-3.
Subtest 01 Sequential Read
This subtest is a sequential reading of all HDD tracks starting at 0. When all
tracks have been read, the test starts at the last track and reads sequentially
back to track 0.
Subtest 02 Address Uniqueness
This subtest writes unique address data to each sector 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 worst pattern data (shown below) to a
cylinder, then reads the data from cylinder to cylinder.
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
Subtest 05 Write /read/compare (CE)
This subtest writes B5ADADh worst pattern data to the CE cylinder on the
HDD, then reads the data and compares it with the original data.