<s>
Cylinder	B-Device
1024	I-Device
is	O
the	O
first	O
cylinder	O
of	O
a	O
hard	B-Device
disk	I-Device
that	O
was	O
inaccessible	O
in	O
the	O
original	O
IBM	O
PC	O
compatible	O
hardware	O
specification	O
,	O
interrupt	B-Device
13h	I-Device
,	O
which	O
uses	O
cylinder-head-sector	B-Device
addressing	O
.	O
</s>
<s>
At	O
boot	O
time	O
,	O
the	O
BIOS	B-Operating_System
of	O
many	O
very	O
old	O
PCs	O
could	O
only	O
access	O
the	O
first	O
1024	O
cylinders	O
,	O
numbered	O
0	O
to	O
1023	O
,	O
as	O
the	O
specific	O
CHS	O
addressing	O
used	O
by	O
the	O
BIOS	B-Operating_System
interrupt	B-Device
13	I-Device
API	O
only	O
defines	O
10	O
bits	O
for	O
the	O
cylinder	O
count	O
(	O
2^10	O
=	O
1024	O
)	O
.	O
</s>
<s>
This	O
was	O
a	O
problem	O
for	O
operating	B-General_Concept
systems	I-General_Concept
on	O
the	O
x86	B-Operating_System
platform	O
as	O
the	O
BIOS	B-Operating_System
must	O
be	O
able	O
to	O
load	O
the	O
bootloader	B-Application
and	O
the	O
entire	O
kernel	B-Operating_System
image	I-Operating_System
into	O
memory	O
.	O
</s>
<s>
Older	O
versions	O
of	O
Microsoft	B-Application
Windows	I-Application
resolved	O
this	O
by	O
necessitating	O
that	O
the	O
operating	B-General_Concept
system	I-General_Concept
was	O
installed	O
to	O
the	O
first	O
partition	O
.	O
</s>
<s>
Partly	O
because	O
of	O
this	O
bug	O
,	O
users	O
of	O
the	O
Linux	B-Application
operating	I-Application
system	I-Application
have	O
traditionally	O
created	O
a	O
partition	O
to	O
reside	O
within	O
the	O
first	O
1024	O
cylinders	O
of	O
the	O
disk	O
,	O
containing	O
little	O
more	O
than	O
the	O
kernel	B-Operating_System
and	O
bootloader	B-Application
.	O
</s>
