<s>
A	O
track	O
is	O
a	O
physical	O
division	O
of	O
data	O
in	O
a	O
disk	O
drive	O
,	O
as	O
used	O
in	O
the	O
Cylinder-Head-Record	O
(	O
CCHHR	O
)	O
addressing	O
mode	O
of	O
a	O
CKD	B-Application
disk	I-Application
.	O
</s>
<s>
The	O
concept	O
is	O
concentric	O
,	O
through	O
the	O
physical	O
platters	B-Device
,	O
being	O
a	O
data	O
circle	O
per	O
each	O
cylinder	O
of	O
the	O
whole	O
disk	O
drive	O
.	O
</s>
<s>
Tracks	O
are	O
subdivided	O
into	O
blocks	O
(	O
or	O
sectors	O
,	O
pages	O
)	O
(	O
see	O
:	O
Storage	B-Application
block	I-Application
and	O
Virtual	B-General_Concept
page	I-General_Concept
)	O
.	O
</s>
