Sharp FDD-412A - Page 99

FDD412A/B
5.2.4 Major Floppy Disk Failures
Given
below
are
examples
of
failures
encountered
in
the
field
and
classified
into
18
patterns.
The
patterns
are
categorized
into
three
groups
by
hardware
and
operation:
disk,
jacket
and
read/write
status.
The
probable
causes
listed
under
the
"Probable
Cause"
column
are
only
the
causes
actually
encountered
in
the
field.
They
do
not
necessarily
apply
to
all
cases.
Table 5.7 (1)
Error Sympyom
Group Typical Failure Probable Cause
; Remedy
Wa The oxide-coated sur- 1. The surface came in |1. Read error or
face is damaged or contact with pins write error.
dented. or the like. -
2. Entries were made ie Sendie Wit Sakae
into the label with |2. Initialize.
|| a ball~point pen or (a) Discard the disk
some writing utensils if there are 3
© with a hard tip. or more defec-
| ; ; tive tracks.
O 3. eet ene pace (b) If there are 2
defective tracks
4. Someone leaned on or less, specify
| the disk or placed these tracks and
something heavy on make another
2H | it. initialization.
es be | es
- |2 |There are discolored 1. Fingerprints were 1. Read error or
3 |gtreaks on the oxide- deposited. write error.
| ) coated) Surrace. \a2e Solevent (alcohol, (, ABALe Bitrcaees
thinner, etc.) was -
spilled. 2. Discard.