<s>
Zero	B-Device
seek	I-Device
is	O
a	O
mechanical	O
engineering	O
design	O
component	O
of	O
most	O
computer-controlled	O
data	O
storage	O
devices	O
,	O
including	O
floppy	B-Device
disk	I-Device
drives	I-Device
,	O
tape	O
drives	O
,	O
and	O
early	O
hard	B-Device
drives	I-Device
.	O
</s>
<s>
Most	O
early	O
data	O
storage	O
devices	O
were	O
controlled	O
primarily	O
by	O
stepper	B-Algorithm
motors	I-Algorithm
,	O
which	O
are	O
able	O
to	O
move	O
in	O
very	O
small	O
,	O
precise	O
rotational	O
movements	O
.	O
</s>
<s>
The	O
most	O
common	O
method	O
of	O
stepper	O
synchronization	O
is	O
the	O
zero	B-Device
seek	I-Device
,	O
which	O
is	O
to	O
move	O
the	O
stepper	O
until	O
it	O
is	O
able	O
to	O
find	O
track	O
zero	O
.	O
</s>
<s>
Once	O
track	O
zero	O
has	O
been	O
located	O
,	O
that	O
position	O
is	O
then	O
used	O
to	O
locate	O
all	O
other	O
positions	O
,	O
by	O
continuously	O
staying	O
aware	O
of	O
the	O
number	O
steps	O
the	O
stepper	B-Algorithm
motor	I-Algorithm
has	O
taken	O
.	O
</s>
<s>
The	O
computer	O
will	O
then	O
perform	O
a	O
zero	B-Device
seek	I-Device
in	O
order	O
to	O
realign	O
the	O
stepper	O
on	O
track	O
zero	O
and	O
get	O
it	O
back	O
in	O
alignment	O
,	O
just	O
in	O
case	O
that	O
was	O
the	O
cause	O
of	O
the	O
problem	O
.	O
</s>
