<s>
Apple	B-Application
Partition	I-Application
Map	I-Application
(	O
APM	O
)	O
is	O
a	O
partition	B-Application
scheme	O
used	O
to	O
define	O
the	O
low-level	O
organization	O
of	O
data	O
on	O
disks	O
formatted	O
for	O
use	O
with	O
68k	B-Device
and	O
PowerPC	B-Architecture
Macintosh	B-Device
computers	O
.	O
</s>
<s>
It	O
was	O
introduced	O
with	O
the	O
Macintosh	B-Device
II	I-Device
.	O
</s>
<s>
Disks	O
using	O
the	O
Apple	B-Application
Partition	I-Application
Map	I-Application
are	O
divided	O
into	O
logical	B-Device
blocks	I-Device
,	O
with	O
512	O
bytes	O
usually	O
belonging	O
to	O
each	O
block	B-General_Concept
.	O
</s>
<s>
The	O
first	O
block	B-General_Concept
,	O
Block	B-General_Concept
0	O
,	O
contains	O
an	O
Apple-specific	O
data	O
structure	O
called	O
"	O
Driver	B-Application
Descriptor	O
Map	O
"	O
for	O
the	O
Macintosh	B-Device
Toolbox	I-Device
ROM	O
to	O
load	O
driver	B-Application
updates	O
and	O
patches	O
before	O
loading	O
from	O
a	O
MFS	O
or	O
HFS	B-Application
partition	B-Application
.	O
</s>
<s>
Because	O
APM	O
allows	O
32	O
bits	O
worth	O
of	O
logical	B-Device
blocks	I-Device
,	O
the	O
historical	O
size	O
of	O
an	O
APM	O
formatted	O
disk	O
using	O
small	O
blocks	O
is	O
limited	O
to	O
2	O
TiB	O
.	O
</s>
<s>
The	O
Apple	B-Application
Partition	I-Application
Map	I-Application
maps	O
out	O
all	O
space	O
used	O
(	O
including	O
the	O
map	O
)	O
and	O
unused	O
(	O
free	O
space	O
)	O
on	O
disk	O
,	O
unlike	O
the	O
minimal	O
x86	O
master	B-Device
boot	I-Device
record	I-Device
that	O
only	O
accounts	O
for	O
used	O
non-map	O
partitions	B-Application
.	O
</s>
<s>
This	O
means	O
that	O
every	O
block	B-General_Concept
on	O
the	O
disk	O
(	O
with	O
the	O
exception	O
of	O
the	O
first	O
block	B-General_Concept
,	O
Block	B-General_Concept
0	O
)	O
belongs	O
to	O
a	O
partition	B-Application
.	O
</s>
<s>
Some	O
hybrid	O
disks	O
contain	O
both	O
an	O
ISO	B-Application
9660	I-Application
primary	O
volume	O
descriptor	O
and	O
an	O
Apple	B-Application
Partition	I-Application
Map	I-Application
,	O
thus	O
allowing	O
the	O
disc	O
to	O
work	O
on	O
different	O
types	O
of	O
computers	O
,	O
including	O
Apple	O
systems	O
.	O
</s>
<s>
For	O
accessing	O
volumes	O
,	O
both	O
APM	O
and	O
GPT	B-Application
partitions	I-Application
can	O
be	O
used	O
in	O
a	O
standard	O
manner	O
with	O
Mac	B-Application
OS	I-Application
X	I-Application
Tiger	I-Application
(	O
10.4	B-Application
)	O
and	O
higher	O
.	O
</s>
<s>
For	O
starting	O
an	O
operating	O
system	O
,	O
PowerPC-based	B-Device
systems	I-Device
can	O
only	O
boot	O
from	O
APM	O
disks	O
whereas	O
Intel-based	B-Device
systems	I-Device
generally	O
boot	O
from	O
GPT	B-Application
disks	I-Application
.	O
</s>
<s>
Nevertheless	O
,	O
older	O
Intel-based	B-Device
Macs	I-Device
are	O
able	O
to	O
boot	O
from	O
APM	O
,	O
GPT	B-Application
(	O
GUID	B-Application
Partition	I-Application
Table	I-Application
)	O
and	O
MBR	O
(	O
Master	B-Device
Boot	I-Device
Record	I-Device
,	O
using	O
the	O
BIOS-Emulation	O
called	O
EFI-CSM	O
i.e.	O
</s>
<s>
the	O
Compatibility	O
Support	O
Module	O
provided	O
by	O
EFI	B-Architecture
)	O
.	O
</s>
<s>
Intel-based	O
models	O
that	O
came	O
with	O
Mac	B-Application
OS	I-Application
X	I-Application
Tiger	I-Application
(	O
10.4	B-Application
)	O
or	O
Leopard	B-Application
(	O
10.5	O
)	O
preinstalled	O
had	O
to	O
be	O
able	O
to	O
boot	O
from	O
both	O
APM	O
and	O
GPT	B-Application
disks	I-Application
due	O
to	O
the	O
installation	O
media	O
for	O
these	O
universal	B-Operating_System
versions	I-Operating_System
of	O
Mac	O
OS	O
X	O
,	O
which	O
are	O
APM	O
partitioned	O
in	O
order	O
to	O
remain	O
compatible	O
with	O
PowerPC-based	B-Device
systems	I-Device
.	O
</s>
<s>
However	O
,	O
the	O
installation	O
of	O
OS	O
X	O
on	O
an	O
Intel-based	B-Device
Mac	I-Device
demands	O
a	O
GPT	B-Application
partitioned	O
disk	O
or	O
will	O
refuse	O
to	O
continue	O
,	O
the	O
same	O
way	O
installation	O
on	O
a	O
PowerPC-based	O
system	O
will	O
demand	O
an	O
APM	O
partitioned	O
destination	O
volume	O
.	O
</s>
<s>
Cloning	B-Application
an	O
already	O
installed	O
OS	O
X	O
to	O
an	O
APM	O
partition	B-Application
on	O
Intel	O
systems	O
will	O
remain	O
bootable	O
even	O
on	O
2011	O
Intel-based	B-Device
Macs	I-Device
.	O
</s>
<s>
The	O
one	O
exception	O
for	O
a	O
universal	O
version	O
of	O
Mac	O
OS	O
X	O
(	O
Tiger	O
or	O
Leopard	B-Application
)	O
is	O
an	O
official	O
Apple	O
document	O
describing	O
how	O
to	O
set	O
up	O
a	O
dual	O
bootable	O
external	O
APM	O
disk	O
for	O
use	O
with	O
PowerPC	B-Architecture
and	O
Intel	O
.	O
</s>
<s>
Each	O
entry	O
of	O
the	O
partition	B-Application
table	O
is	O
the	O
size	O
of	O
one	O
data	O
block	B-General_Concept
,	O
which	O
is	O
normally	O
512	O
bytes	O
.	O
</s>
<s>
Each	O
partition	B-Application
entry	O
on	O
the	O
table	O
is	O
the	O
size	O
of	O
one	O
block	B-General_Concept
or	O
sector	O
of	O
data	O
.	O
</s>
<s>
Because	O
the	O
partition	B-Application
table	O
itself	O
is	O
also	O
a	O
partition	B-Application
,	O
the	O
size	O
of	O
this	O
first	O
partition	B-Application
limits	O
the	O
number	O
of	O
entries	O
to	O
the	O
partition	B-Application
table	O
itself	O
.	O
</s>
<s>
The	O
normal	O
case	O
is	O
that	O
64	O
sectors	O
(	O
64	O
×	O
512	O
=	O
32KB	O
)	O
are	O
used	O
by	O
the	O
Apple	B-Application
Partition	I-Application
Map	I-Application
:	O
one	O
block	B-General_Concept
for	O
the	O
Driver	B-Application
Descriptor	O
Map	O
as	O
Block	B-General_Concept
0	O
,	O
one	O
block	B-General_Concept
for	O
the	O
partition	B-Application
table	O
itself	O
and	O
62	O
blocks	O
for	O
a	O
maximum	O
of	O
62	O
data	O
partitions	B-Application
.	O
</s>
<s>
Each	O
partition	B-Application
entry	O
includes	O
the	O
starting	O
sector	O
and	O
the	O
size	O
,	O
but	O
also	O
a	O
name	O
,	O
a	O
type	O
,	O
a	O
position	O
of	O
the	O
data	O
area	O
and	O
possible	O
boot	O
code	O
.	O
</s>
<s>
It	O
also	O
includes	O
the	O
total	O
number	O
of	O
partitions	B-Application
in	O
that	O
partition	B-Application
table	O
.	O
</s>
<s>
This	O
ensures	O
that	O
,	O
after	O
reading	O
the	O
first	O
partition	B-Application
table	O
entry	O
,	O
the	O
firmware	B-Application
is	O
aware	O
of	O
how	O
many	O
blocks	O
more	O
to	O
read	O
from	O
the	O
media	O
in	O
order	O
to	O
have	O
processed	O
every	O
partition	B-Application
table	O
entry	O
.	O
</s>
<s>
Identifier	O
/	O
type	O
Contents	O
/	O
file	B-Application
system	I-Application
Name	O
(	O
typical	O
)	O
Remarks	O
Apple_Boot	O
bootloader	B-Application
MOSX_OF3_Booter	O
,	O
eXternal	O
booter	O
This	O
boot	O
partition	B-Application
is	O
used	O
by	O
Mac	O
OS	O
X	O
on	O
New	B-Device
World	I-Device
Macs	I-Device
(	O
Open	B-Architecture
Firmware	I-Architecture
3.0	O
and	O
greater	O
)	O
when	O
the	O
file	B-Application
system	I-Application
on	O
the	O
main	O
partition	B-Application
is	O
not	O
supported	O
by	O
Open	B-Architecture
Firmware	I-Architecture
,	O
like	O
in	O
a	O
software	O
RAID	B-Architecture
configuration	O
or	O
when	O
using	O
a	O
HFS+	B-Application
case-sensitive	O
or	O
a	O
UFS	O
file	B-Application
system	I-Application
.	O
</s>
<s>
It	O
contains	O
BootX	B-Operating_System
on	O
an	O
HFS	B-Application
filesystem	B-Application
.	O
</s>
<s>
Apple_Boot_RAID	O
bootloader	B-Application
Raid	B-Architecture
Partition	B-Application
Apple_Bootstrap	O
NewWorld	B-Device
bootblock	B-Operating_System
Although	O
it	O
is	O
a	O
general	O
Open	B-Architecture
Firmware	I-Architecture
(	O
New	B-Device
World	I-Device
)	O
boot	O
partition	B-Application
,	O
it	O
is	O
specifically	O
used	O
by	O
yaboot	B-Application
and	O
GRUB	B-Application
for	O
loading	O
PowerPC	B-Architecture
Linux	B-Application
,	O
and	O
will	O
not	O
automount	O
under	O
Mac	O
OS	O
X	O
.	O
</s>
<s>
It	O
must	O
be	O
HFS	B-Application
formatted	O
,	O
so	O
that	O
it	O
can	O
be	O
accessed	O
by	O
Open	B-Architecture
Firmware	I-Architecture
.	O
</s>
<s>
Apple_Driver	O
device	B-Application
driver	I-Application
Macintosh	B-Device
Classic	O
Mac	O
OS	O
drivers	O
partition	B-Application
Apple_Driver43	O
SCSI	B-Architecture
Manager	O
4.3	O
device	B-Application
driver	I-Application
Macintosh	B-Device
Classic	O
Mac	O
OS	O
drivers	O
partition	B-Application
Apple_Driver43_CD	O
SCSI	B-Architecture
CD-ROM	B-Device
device	B-Application
driver	I-Application
Macintosh	B-Device
Classic	O
Mac	O
OS	O
drivers	O
partition	B-Application
Apple_Driver_ATA	O
ATA	B-Protocol
device	B-Application
driver	I-Application
Macintosh	B-Device
Classic	O
Mac	O
OS	O
drivers	O
partition	B-Application
Apple_Driver_ATAPI	O
ATAPI	O
device	B-Application
driver	I-Application
Macintosh	B-Device
Classic	O
Mac	O
OS	O
drivers	O
partition	B-Application
Apple_Driver_IOKit	O
I/O	O
Kit	O
driver	B-Application
Macintosh	B-Device
Classic	O
Mac	O
OS	O
drivers	O
partition	B-Application
Apple_Driver_OpenFirmware	O
Macintosh	B-Device
Apple_Extra	O
unused	O
This	O
identifier	O
masks	O
an	O
unused	O
partition	B-Application
map	O
entry	O
.	O
</s>
<s>
Apple_Free	O
free	O
space	O
Extra	O
This	O
identifier	O
masks	O
free	O
space	O
as	O
a	O
partition	B-Application
map	O
entry	O
.	O
</s>
<s>
Apple_FWDriver	O
FireWire	B-Protocol
device	B-Application
driver	I-Application
Macintosh	B-Device
Classic	O
Mac	O
OS	O
drivers	O
partition	B-Application
Apple_HFS	O
Hierarchical	B-Application
File	I-Application
System	I-Application
Apple_HFS	O
While	O
normally	O
a	O
HFS	B-Application
or	O
HFS+	B-Application
volume	O
for	O
Mac	O
OS	O
and	O
Mac	O
OS	O
X	O
,	O
it	O
can	O
also	O
contain	O
an	O
MS-DOS	O
formatted	O
file	B-Application
system	I-Application
(	O
File	B-Application
Allocation	I-Application
Table	I-Application
,	O
which	O
can	O
be	O
accessed	O
by	O
Mac	O
OS	O
and	O
Mac	O
OS	O
X	O
)	O
.	O
</s>
<s>
Apple_HFSX	O
HFS	B-Application
Plus	I-Application
This	O
partition	B-Application
contains	O
a	O
HFS+	B-Application
volume	O
without	O
a	O
HFS	B-Application
wrapper	O
.	O
</s>
<s>
HFSX	B-Application
was	O
introduced	O
with	O
Mac	B-Operating_System
OS	I-Operating_System
X	I-Operating_System
10.3	I-Operating_System
and	O
is	O
only	O
used	O
in	O
special	O
cases	O
,	O
like	O
case	O
sensitive	O
HFS+	B-Application
.	O
</s>
<s>
HFSX	B-Application
is	O
the	O
standard	O
partition	B-Application
type	O
on	O
Intel-based	B-Device
Macs	I-Device
(	O
which	O
use	O
GPT	B-Application
instead	O
of	O
APM	O
)	O
.	O
</s>
<s>
Apple_Loader	O
–	O
SecondaryLoader	O
Like	O
Apple_Boot	O
but	O
on	O
Old	B-Device
World	I-Device
Macs	I-Device
,	O
it	O
is	O
used	O
when	O
Mac	O
OS	O
X	O
is	O
installed	O
on	O
a	O
file	B-Application
system	I-Application
not	O
readable	O
by	O
Open	B-Architecture
Firmware	I-Architecture
.	O
</s>
<s>
This	O
partition	B-Application
does	O
not	O
contain	O
a	O
filesystem	B-Application
—	O
instead	O
it	O
contains	O
the	O
BootX	B-Operating_System
machine	B-Language
code	I-Language
in	O
XCOFF	B-Operating_System
format	O
.	O
</s>
<s>
This	O
partition	B-Application
type	O
was	O
discontinued	O
with	O
Mac	B-Operating_System
OS	I-Operating_System
X	I-Operating_System
10.3	I-Operating_System
.	O
</s>
<s>
Apple_MDFW	O
firmware	B-Application
firmware	B-Application
This	O
partition	B-Application
is	O
used	O
by	O
iPod	O
to	O
load	O
the	O
firmware/OS	O
.	O
</s>
<s>
Apple_MFS	O
Macintosh	B-Application
File	I-Application
System	I-Application
This	O
partition	B-Application
is	O
used	O
by	O
Mac	O
OS	O
for	O
the	O
Macintosh	B-Application
File	I-Application
System	I-Application
(	O
MFS	O
)	O
,	O
which	O
was	O
introduced	O
with	O
the	O
Macintosh	B-Device
128K	I-Device
in	O
1984	O
.	O
</s>
<s>
Apple_partition_map	O
partition	B-Application
map	O
Apple	O
The	O
partition	B-Application
map	O
is	O
also	O
a	O
partition	B-Application
of	O
its	O
own	O
.	O
</s>
<s>
It	O
can	O
vary	O
in	O
size	O
depending	O
on	O
how	O
many	O
partitions	B-Application
it	O
may	O
contain	O
.	O
</s>
<s>
Apple_Patches	O
patches	O
Patch	O
Partition	B-Application
Mac	O
OS	O
classic	O
patch	O
partition	B-Application
Apple_PRODOS	O
ProDOS	B-Operating_System
ProDOS	B-Operating_System
file	B-Application
system	I-Application
Apple_RAID	O
RAID	B-Architecture
Apple_RAID_OfflineV2	O
This	O
identifier	O
marks	O
a	O
Mac	O
OS	O
X	O
partition	B-Application
used	O
in	O
a	O
software	O
RAID	B-Architecture
configuration	O
.	O
</s>
<s>
It	O
normally	O
contains	O
the	O
same	O
filesystems	B-Application
a	O
regular	O
Mac	O
OS	O
X	O
installation	O
would	O
have	O
,	O
like	O
HFS/HFS	O
+	O
or	O
UFS	O
.	O
</s>
<s>
The	O
separate	O
boot	O
partition	B-Application
Apple_Boot	O
is	O
mandatory	O
.	O
</s>
<s>
Apple_Rhapsody_UFS	O
Unix	B-Operating_System
File	I-Operating_System
System	I-Operating_System
Mac	O
OS	O
X	O
Server	O
This	O
partition	B-Application
contains	O
a	O
Unix	B-Operating_System
File	I-Operating_System
System	I-Operating_System
(	O
UFS	O
)	O
used	O
by	O
the	O
Apple	B-Operating_System
Rhapsody	I-Operating_System
operating	O
system	O
(	O
a	O
development	O
name	O
marking	O
the	O
transition	O
from	O
OPENSTEP	B-Operating_System
to	O
Mac	O
OS	O
X	O
)	O
and	O
is	O
also	O
used	O
by	O
Mac	B-Operating_System
OS	I-Operating_System
X	I-Operating_System
Server	I-Operating_System
1.0	I-Operating_System
through	I-Operating_System
1.2	I-Operating_System
v3	I-Operating_System
.	O
</s>
<s>
Apple_Scratch	O
empty	O
This	O
identifier	O
marks	O
an	O
empty	O
partition	B-Application
.	O
</s>
<s>
Apple_Second	O
Second	O
stage	O
bootloader	B-Application
Apple_UFS	O
Unix	B-Operating_System
File	I-Operating_System
System	I-Operating_System
Mac	O
OS	O
X	O
This	O
partition	B-Application
contains	O
a	O
Unix	B-Operating_System
File	I-Operating_System
System	I-Operating_System
(	O
UFS	O
)	O
and	O
is	O
used	O
by	O
Mac	O
OS	O
X	O
,	O
Mac	O
OS	O
X	O
Server	O
(	O
Version	O
10.0	O
and	O
newer	O
)	O
and	O
various	O
Unix-like	B-Operating_System
operating	I-Operating_System
systems	I-Operating_System
.	O
</s>
<s>
Apple_UNIX_SVR2	O
A/UX	B-Operating_System
,	O
Unix	O
Originally	O
introduced	O
for	O
A/UX	B-Operating_System
(	O
Apple	O
Unix	O
operating	O
system	O
based	O
on	O
System	O
V	O
Release	O
2	O
,	O
hence	O
SVR2	O
)	O
on	O
the	O
68k	B-Device
,	O
it	O
was	O
later	O
reused	O
for	O
MkLinux	B-Application
which	O
used	O
the	O
Extended	B-Application
file	I-Application
system	I-Application
.	O
</s>
<s>
It	O
is	O
the	O
standard	O
partition	B-Application
identifier	O
for	O
many	O
Unix-like	B-Operating_System
operating	I-Operating_System
systems	I-Operating_System
,	O
including	O
Linux	B-Application
and	O
NetBSD	B-Device
.	O
</s>
<s>
It	O
may	O
contain	O
any	O
file	B-Application
system	I-Application
suitable	O
for	O
the	O
installed	O
operating	O
system	O
.	O
</s>
<s>
If	O
bootable	O
,	O
a	O
file	B-Application
system	I-Application
that	O
can	O
be	O
read	O
by	O
the	O
Open	B-Architecture
Firmware	I-Architecture
bootloader	B-Application
from	O
Apple_Bootstrap	O
(	O
e.g.	O
</s>
<s>
yaboot	B-Application
)	O
must	O
be	O
used	O
.	O
</s>
<s>
Apple_Void	O
ISO9660	B-Application
padding	B-Application
A	O
dummy	B-General_Concept
partition	B-Application
map	O
entry	O
to	O
ensure	O
correct	O
partition	B-Application
alignment	B-Application
on	O
bootable	O
media	O
.	O
</s>
<s>
Be_BFS	O
Be	B-Language
File	I-Language
System	I-Language
This	O
partition	B-Application
contains	O
a	O
Be	B-Language
File	I-Language
System	I-Language
(	O
BFS	O
)	O
and	O
is	O
normally	O
used	O
by	O
BeOS	B-Application
.	O
</s>
<s>
MFSTiVo	O
Media	O
File	B-Application
System	I-Application
MFS	O
application	O
region	O
,	O
MFS	O
media	O
regionUsed	O
to	O
hold	O
the	O
proprietary	O
Media	O
File	B-Application
System	I-Application
on	O
TiVo	O
hard	O
drives	O
formatted	O
using	O
Apple	B-Application
Partition	I-Application
Map	I-Application
.	O
</s>
<s>
Partition	B-Application
status	O
is	O
a	O
bit	O
field	O
composed	O
of	O
the	O
flags	O
:	O
</s>
