<s>
Blu-ray	B-Operating_System
Disc	I-Operating_System
Recordable	I-Operating_System
(	O
BD-R	B-Operating_System
)	O
refers	O
to	O
two	O
direct	O
to	O
disc	O
optical	B-Device
disc	I-Device
recording	I-Device
technologies	I-Device
that	O
can	O
be	O
recorded	O
on	O
to	O
a	O
Blu-ray-based	O
optical	B-Device
disc	I-Device
with	O
an	O
optical	B-Device
disc	I-Device
recorder	O
.	O
</s>
<s>
BD-R	B-Operating_System
discs	O
can	O
be	O
written	O
to	O
once	O
,	O
whereas	O
Blu-ray	B-Operating_System
Disc	I-Operating_System
Recordable	I-Operating_System
Erasable	I-Operating_System
(	O
BD-RE	B-Operating_System
)	O
can	O
be	O
erased	O
and	O
re-recorded	O
multiple	O
times	O
.	O
</s>
<s>
Disc	O
capacities	O
are	O
25	O
GB	O
for	O
single-layer	O
discs	O
,	O
50	O
GB	O
for	O
double-layer	O
discs	O
,	O
100	O
GB	O
(	O
"	O
XL	O
"	O
)	O
for	O
triple-layer	O
,	O
and	O
128	O
GB	O
for	O
quadruple-layer	O
(	O
in	O
BD-R	B-Operating_System
only	O
)	O
.	O
</s>
<s>
,	O
there	O
are	O
five	O
versions	O
of	O
Blu-ray	B-Operating_System
Disc	I-Operating_System
Recordable	I-Operating_System
Erasable	I-Operating_System
(	O
BD-RE	B-Operating_System
)	O
and	O
four	O
versions	O
of	O
Blu-ray	B-Operating_System
Disc	I-Operating_System
Recordable	I-Operating_System
(	O
BD-R	B-Operating_System
)	O
.	O
</s>
<s>
New	O
BD-R	B-Operating_System
Low	O
To	O
High	O
physical	O
format.LTH	O
was	O
included	O
in	O
the	O
"	O
Blu-ray	B-Operating_System
Disc	I-Operating_System
Recordable	I-Operating_System
Format	O
Ver.1.2	O
"	O
specifications	O
.	O
</s>
<s>
Drive	O
speedData	O
rate25GB	O
BD-R(E )	O
write	O
time50GB	O
BD-R(E )	O
DL	O
(	O
25GB/layer	O
)	O
write	O
time100GB	O
BD-R(E )	O
XL	O
TL	O
(	O
~	O
33GB/layer	O
)	O
write	O
time1×36	O
Mbit/s4.5	O
MB/s4.29	O
MiB/s	O
~	O
95	O
min.	O
~	O
190	O
min.	O
~	O
380	O
min.2	O
×72	O
Mbit/s9	O
MB/s8.58	O
MiB/s	O
~	O
47	O
min.	O
~	O
94	O
min.	O
~	O
188	O
min.4	O
×144	O
Mbit/s18	O
MB/s17.17	O
MiB/s	O
~	O
24	O
min.	O
~	O
48	O
min.	O
~	O
96	O
min.6	O
×216	O
Mbit/s27	O
MB/s25.75	O
MiB/s	O
~	O
16	O
min.	O
~	O
32	O
min.	O
~	O
64	O
min.8	O
×288	O
Mbit/s36	O
MB/s	O
~	O
34.32	O
MiB/s	O
~	O
11.25	O
min.	O
~	O
22.5	O
min.	O
~	O
45	O
min.10	O
×360	O
Mbit/s45	O
MB/s42.898	O
MiB/s	O
~	O
9	O
min.	O
~	O
18	O
min.	O
~	O
36	O
min.12	O
×432	O
Mbit/s54	O
MB/s	O
~	O
51.48	O
MiB/s	O
~	O
7.5	O
min.	O
~	O
15	O
min.	O
~	O
30	O
min.14	O
×504	O
Mbit/s63	O
MB/s	O
~	O
60	O
MiB/s	O
~	O
6.5	O
min.	O
~	O
13	O
min.	O
~	O
26	O
min.16	O
×576	O
Mbit/s72	O
MB/s	O
~	O
68.64	O
MiB/s	O
~	O
5.7	O
min.	O
~	O
11.5	O
min.	O
~	O
23	O
min	O
.	O
</s>
<s>
2×	O
speeds	O
are	O
mandatory	O
for	O
all	O
formats	O
,	O
with	O
4×	O
and	O
6×	O
being	O
optional	O
for	O
non-XL	O
BD-R	B-Operating_System
media	O
.	O
</s>
<s>
Since	O
BD-RE	B-Operating_System
5.0/BD	O
-R	O
4.0	O
,	O
a	O
read	O
speed	O
of	O
4×	O
is	O
mandatory	O
for	O
UHD	O
support	O
.	O
</s>
<s>
Note	O
:	O
Add	O
extra	O
time	O
for	O
disc	O
verification	O
phase	O
and	O
time	O
for	O
erasing	O
the	O
disc	O
in	O
the	O
case	O
of	O
BD-RE	B-Operating_System
.	O
</s>
<s>
6×	O
single-layer	O
BD-R	B-Operating_System
disc	O
(	O
25GB	O
)	O
US	O
$0.42	O
each	O
in	O
quantity	O
;	O
</s>
<s>
10×	O
single-layer	O
BD-R	B-Operating_System
disc	O
(	O
25GB	O
)	O
CN	O
¥2.04	O
each	O
in	O
quantity	O
;	O
</s>
<s>
6×	O
double-layer	O
BD-R	B-Operating_System
disc	O
(	O
50GB	O
)	O
US	O
$1.64	O
in	O
quantity	O
;	O
</s>
<s>
2×	O
single-layer	O
BD-RE	B-Operating_System
disc	O
(	O
25GB	O
)	O
US	O
$0.82	O
in	O
quantity	O
;	O
</s>
<s>
2×	O
double-layer	O
BD-RE	B-Operating_System
disc	O
(	O
50GB	O
)	O
US	O
$3.15	O
in	O
quantity	O
;	O
</s>
<s>
4×	O
BD-R	B-Operating_System
XL	O
disc	O
(	O
100GB	O
)	O
US$5	O
in	O
quantity	O
;	O
</s>
<s>
4×	O
BD-RE	B-Operating_System
XL	O
disc	O
(	O
100	O
GB	O
)	O
US$11	O
in	O
quantity	O
;	O
</s>
<s>
Instead	O
of	O
the	O
pits	O
and	O
lands	O
found	O
on	O
prepressed/prerecorded/replicated	O
discs	O
,	O
BD-R	B-Operating_System
and	O
RE	O
discs	O
contain	O
grooves	O
which	O
contain	O
a	O
wobble	B-Device
frequency	I-Device
that	O
is	O
used	O
to	O
locate	O
the	O
position	O
of	O
the	O
reading	O
or	O
writing	O
laser	O
on	O
the	O
disc	O
.	O
</s>
<s>
BD-R	B-Operating_System
has	O
an	O
Optimum	O
Power	O
Calibrations	O
(	O
OPC	O
)	O
/	O
Test	O
Zone	O
,	O
which	O
is	O
used	O
to	O
calibrate	O
(	O
finely	O
adjust	O
)	O
the	O
power	O
of	O
the	O
writing	O
laser	O
before	O
and	O
during	O
writing	O
,	O
and	O
it	O
also	O
has	O
a	O
Drive	O
Calibration	O
Zone	O
(	O
DCZ	O
)	O
at	O
the	O
outer	O
edge	O
of	O
the	O
disc	O
,	O
for	O
optional	O
high	O
speed	O
calibration	O
.	O
</s>
<s>
The	O
information	O
below	O
describes	O
the	O
different	O
types	O
of	O
recording	O
layers	O
that	O
may	O
be	O
used	O
on	O
BD-R	B-Operating_System
and	O
BD-RE	B-Operating_System
discs	O
.	O
</s>
<s>
"	O
Normal	O
"	O
BD-R	B-Operating_System
discs	O
use	O
a	O
composite	O
(	O
or	O
,	O
in	O
the	O
case	O
of	O
BD-RE	B-Operating_System
,	O
a	O
phase-changing	O
alloy	O
)	O
that	O
decreases	O
its	O
reflectivity	O
on	O
recording	O
,	O
i.e.	O
</s>
<s>
Similar	O
to	O
CD-RW	O
and	O
DVD-RW	O
,	O
a	O
phase	O
transition	O
alloy	O
(	O
often	O
GeSbTe	O
or	O
InAgTeSb	O
;	O
copper	O
silicate	O
(	O
CuSi	O
)	O
or	O
other	O
alloys	O
can	O
also	O
be	O
used	O
,	O
like	O
Verbatim	O
's	O
proprietary	O
MABL	O
)	O
is	O
used	O
for	O
BD-RE	B-Operating_System
discs	O
.	O
</s>
<s>
In	O
BD-RE	B-Operating_System
discs	O
,	O
the	O
data	O
layers	O
are	O
surrounded	O
by	O
a	O
pair	O
of	O
dielectric	O
Zinc	O
Sulfur-Silicon	O
Dioxide	O
layers	O
.	O
</s>
<s>
On	O
multi-layer	O
BD-RE	B-Operating_System
discs	O
,	O
each	O
GeSbTe	O
recording	O
layer	O
is	O
progressively	O
thinner	O
.	O
</s>
<s>
BD-R	B-Operating_System
LTH	O
is	O
a	O
write-once	O
Blu-ray	O
Disc	O
format	O
that	O
features	O
an	O
organic	O
dye	O
recording	O
layer	O
.	O
</s>
<s>
The	O
advantage	O
of	O
BD-R	B-Operating_System
LTH	O
is	O
it	O
can	O
protect	O
a	O
manufacturer	O
's	O
investment	O
in	O
DVD-R/CD	O
-R	O
manufacturing	O
equipment	O
because	O
it	O
does	O
not	O
require	O
investing	O
in	O
new	O
production	O
lines	O
and	O
manufacturing	O
equipment	O
.	O
</s>
<s>
Old	O
Blu-ray	O
players	O
and	O
recorders	O
cannot	O
utilize	O
BD-R	B-Operating_System
LTH	O
;	O
however	O
,	O
a	O
firmware	O
upgrade	O
can	O
enable	O
devices	O
to	O
access	O
BD-R	B-Operating_System
LTH	O
.	O
</s>
<s>
Sony	O
upgraded	O
the	O
PlayStation	B-Operating_System
3	I-Operating_System
firmware	O
enabling	O
BD-R	B-Operating_System
LTH	O
reading	O
in	O
March	O
,	O
2008	O
.	O
</s>
