6.
The Hard Disk Test message appears after you respond
to
the Detail Status
prompt. Select the number
of
the subtest you want
to
execute and press
Enter.
The following message displays during each subtest.
Subtest
01
Subtest 02
Subtest
03
3-28
HARD
DISK TEST
xxxxxxx
SUB-TEST :
XX
PASS
COUNT:
XXXXX
ERROR
COUNT:
XXXXX
WRITE
DATA:
XX
READ
DATA
:
xx
ADDRESS
:
XXXXXX
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 3-3 in Section 3-14.
Sequential Read
This subtest is a sequential reading
of
all the tracks
on
the
lIDO
starting
at
Track
O.
When all the tracks
on
the
lIDO
have been read, the test starts at the
maximum track and reads the tracks
on
the
lIDO
sequentially back
to
Track
O.
Address Uniqueness
This subtest writes unique address data
to
each sector
of
the
lIDD
track-by-
track. The data written
to
each sector is then read and compared with the
original data. There are three ways the
lIDD
can be read:
· Forward sequential
· Reverse sequential
· Random
Random AddresslData
This subtest writes random data
to
random addresses
on
the
HOD
cylinder,
head and sector. This data is then read and compared
to
the original data.
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