<s>
The	O
Seagate	B-Operating_System
Barracuda	I-Operating_System
is	O
a	O
series	O
of	O
hard	B-Device
disk	I-Device
drives	I-Device
and	O
later	O
solid	B-Device
state	I-Device
drives	I-Device
produced	O
by	O
Seagate	O
Technology	O
that	O
was	O
first	O
introduced	O
in	O
1993	O
.	O
</s>
<s>
The	O
line	O
initially	O
focused	O
on	O
high-capacity	O
,	O
high-performance	O
SCSI	O
hard	B-Device
drives	I-Device
until	O
introducing	O
ATA	O
models	O
in	O
1999	O
and	O
SATA	O
models	O
in	O
2002	O
.	O
</s>
<s>
Since	O
2001	O
,	O
the	O
Barracuda	O
is	O
Seagate	O
's	O
most	O
popular	O
product	O
line	O
as	O
the	O
hard	B-Device
disk	I-Device
drive	I-Device
industry	O
started	O
to	O
move	O
to	O
a	O
7200	O
RPM	O
spindle	O
speed	O
.	O
</s>
<s>
In	O
1992	O
,	O
Seagate	O
introduced	O
the	O
first	O
ever	O
7200-RPM	O
spindle	O
speed	O
hard	B-Device
drive	I-Device
,	O
the	O
Barracuda	O
1	O
,	O
sold	O
in	O
capacity	O
of	O
1.7	O
GB	O
with	O
a	O
size	O
of	O
3.5	O
inches	O
.	O
</s>
<s>
On	O
July	O
24	O
,	O
1995	O
,	O
Seagate	O
has	O
shipped	O
over	O
one	O
million	O
Barracuda	O
hard	B-Device
drives	I-Device
.	O
</s>
<s>
On	O
November	O
13	O
,	O
2000	O
,	O
Seagate	O
launched	O
the	O
Barracuda	O
180	O
series	O
,	O
it	O
had	O
the	O
world	O
's	O
highest	O
capacity	O
for	O
hard	B-Device
drives	I-Device
at	O
the	O
time	O
,	O
with	O
181	O
GB	O
.	O
</s>
<s>
On	O
December	O
2	O
,	O
2002	O
,	O
Seagate	O
began	O
shipping	O
the	O
first	O
ever	O
Serial	O
ATA	O
hard	B-Device
drive	I-Device
,	O
the	O
Barracuda	O
7200.7	O
series	O
.	O
</s>
<s>
On	O
March	O
24	O
,	O
2003	O
,	O
Seagate	O
made	O
their	O
Serial	O
ATA	O
hard	B-Device
drive	I-Device
's	O
available	O
for	O
retail	O
consumers	O
.	O
</s>
<s>
The	O
drive	O
had	O
a	O
capacity	O
of	O
2.03	O
GB	O
(	O
1.69	O
GB	O
formatted	O
)	O
,	O
was	O
available	O
with	O
FAST	O
SCSI-2	O
(	O
N/ND	O
models	O
)	O
or	O
WIDE	O
SCSI-2	O
(	O
W/WD	O
models	O
)	O
interface	O
,	O
and	O
was	O
the	O
first	O
hard	B-Device
drive	I-Device
ever	O
to	O
have	O
a	O
spindle	O
speed	O
of	O
7200-RPM	O
.	O
</s>
<s>
It	O
was	O
based	O
on	O
the	O
Seagate	O
Sabre	O
8	O
"	O
and	O
Seagate	O
Elite	O
5.25	O
"	O
lines	O
of	O
hard	B-Device
disk	I-Device
drives	I-Device
.	O
</s>
<s>
They	O
were	O
the	O
highest	O
capacity	O
hard	B-Device
drives	I-Device
in	O
the	O
world	O
at	O
the	O
time	O
.	O
</s>
<s>
These	O
drives	O
operate	O
very	O
quietly	O
as	O
they	O
are	O
one	O
of	O
the	O
first	O
hard	B-Device
drives	I-Device
to	O
use	O
fluid	O
dynamic	O
bearings	O
in	O
their	O
spindle	O
motors	O
.	O
</s>
<s>
Furthermore	O
,	O
their	O
seek	O
times	O
were	O
slowed	O
in	O
firmware	B-Application
to	O
reduce	O
noise	O
output	O
.	O
</s>
<s>
Barracuda	O
V	O
with	O
SATA	O
port	O
is	O
one	O
of	O
the	O
first	O
hard	B-Device
drives	I-Device
to	O
feature	O
a	O
SATA	O
interface	O
.	O
</s>
<s>
This	O
was	O
the	O
first	O
Seagate	O
hard	B-Device
drive	I-Device
to	O
use	O
perpendicular	B-Device
magnetic	I-Device
recording	I-Device
(	O
PMR	O
)	O
technology	O
(	O
only	O
in	O
250GB	O
SATA	O
models	O
:	O
ST3250410AS	O
with	O
16MB	O
of	O
cache	O
and	O
ST3250310AS	O
with	O
8MB	O
of	O
cache	O
)	O
.	O
</s>
<s>
Industry	O
's	O
competitors	O
ended	O
development	O
of	O
IDE	O
hard	B-Device
drives	I-Device
on	O
lower	O
capacities	O
:	O
Hitachi	O
(	O
despite	O
having	O
plans	O
to	O
offer	O
750	O
GB	O
and	O
1	O
TB	O
IDE	O
drives	O
which	O
were	O
eventually	O
never	O
produced	O
and	O
released	O
)	O
,	O
Maxtor	O
(	O
before	O
its	O
acquisition	O
by	O
Seagate	O
)	O
and	O
Western	O
Digital	O
ended	O
on	O
500GB	O
and	O
Samsung	O
ended	O
on	O
400GB	O
.	O
</s>
<s>
The	O
SATA	O
models	O
of	O
this	O
family	O
with	O
firmware	B-Application
3.AAK	O
[	O
codename	O
GALAXY ]	O
or	O
older	O
(	O
e.g.	O
</s>
<s>
3.AAE	O
[ codename	O
TONKA ]	O
)	O
have	O
introduced	O
a	O
firmware	B-Application
bug	O
:	O
</s>
<s>
Seagate	O
does	O
not	O
officially	O
provide	O
firmware	B-Application
updates	O
for	O
this	O
issue	O
;	O
however	O
,	O
an	O
unofficial	O
firmware	B-Application
update	O
(	O
3.AAM	O
)	O
exists	O
for	O
the	O
following	O
drive	O
models	O
:	O
</s>
<s>
ST3320620AS	O
with	O
part	O
number	O
9BJ14G-308	O
(	O
with	O
firmware	B-Application
3.AAK	O
)	O
,	O
</s>
<s>
Alongside	O
normally	O
retailed	O
models	O
,	O
a	O
2TB	O
version	O
(	O
model	O
number	O
ST32000540AS	O
)	O
was	O
produced	O
in	O
2009	O
,	O
being	O
marked	O
on	O
the	O
label	O
as	O
Barracuda	O
7200.11	O
;	O
actually	O
it	O
's	O
a	O
pre-production	O
series	O
of	O
Barracuda	O
XT	O
drives	O
,	O
installed	O
in	O
certain	O
models	O
of	O
FreeAgent	B-Device
,	O
Expansion	O
and	O
BlackArmor	O
external	O
drives	O
.	O
</s>
<s>
This	O
family	O
has	O
introduced	O
many	O
severe	O
firmware	B-Application
bugs	O
:	O
</s>
<s>
The	O
symptom	O
of	O
the	O
problem	O
is	O
that	O
the	O
computer	O
BIOS	O
will	O
no	O
longer	O
detect	O
the	O
hard	B-Device
disk	I-Device
after	O
a	O
reboot	O
,	O
and	O
upon	O
connecting	O
to	O
the	O
hard	B-Device
disk	I-Device
with	O
a	O
serial	O
TTL	O
board	O
,	O
this	O
error	O
code	O
will	O
be	O
seen	O
as	O
"	O
LED:000000CC	O
FAddr:0024A051.	O
"	O
</s>
<s>
Faulty	O
firmware	B-Application
triggers	O
this	O
"	O
failure.	O
"	O
</s>
<s>
Seagate	B-Device
FreeAgent	I-Device
external	O
drives	O
have	O
also	O
utilized	O
7200.11	O
hard	B-Device
disks	I-Device
with	O
the	O
SDxx	O
firmware	B-Application
,	O
and	O
failures	O
of	O
these	O
hard	B-Device
drives	I-Device
were	O
also	O
reported	O
.	O
</s>
<s>
However	O
,	O
Seagate	O
says	O
that	O
the	O
LED	O
light	O
remaining	O
permanently	O
on	O
had	O
nothing	O
to	O
do	O
with	O
firmware	B-Application
problems	O
.	O
</s>
<s>
In	O
order	O
to	O
fix	O
the	O
first	O
bug	O
,	O
Seagate	O
released	O
firmware	B-Application
update	O
AD14	O
for	O
the	O
affected	O
disk	O
models	O
;	O
to	O
fix	O
the	O
second	O
,	O
third	O
and	O
fourth	O
bugs	O
,	O
Seagate	O
released	O
firmware	B-Application
updates	O
SD1A	O
,	O
SD1B	O
,	O
SD2B	O
and	O
SD81	O
.	O
</s>
<s>
The	O
SD2B	O
firmware	B-Application
update	O
for	O
Brinks	O
removes	O
the	O
DCO	O
ATA	O
feature	O
from	O
the	O
disks	O
,	O
while	O
SD1A	O
for	O
Moose	O
adds	O
two	O
ATA	O
features	O
.	O
</s>
<s>
Similar	O
to	O
the	O
7200.11	O
family	O
,	O
this	O
family	O
has	O
introduced	O
many	O
firmware	B-Application
bugs	O
,	O
which	O
was	O
fixed	O
by	O
SN06	O
firmware	B-Application
released	O
by	O
Seagate	O
:	O
</s>
<s>
RAID	B-Architecture
arrays	I-Architecture
using	O
these	O
disks	O
may	O
fail	O
.	O
</s>
<s>
Initial	O
models	O
(	O
CCxx	O
firmware	B-Application
)	O
supported	O
up	O
to	O
SATA3Gbit/s	O
,	O
while	O
later	O
revisions	O
(	O
firmware	B-Application
JCxx	O
)	O
support	O
the	O
newer	O
SATA6Gbit/s	O
interface	O
.	O
</s>
<s>
Barracuda	O
XT	O
used	O
re-engineered	O
mechanical	O
design	O
,	O
which	O
featured	O
,	O
for	O
the	O
first	O
time	O
in	O
desktop	O
hard	B-Device
drives	I-Device
from	O
Seagate	O
,	O
a	O
head	O
unload	O
ramp	O
,	O
a	O
feature	O
shared	O
with	O
Western	O
Digital	O
,	O
Toshiba	O
,	O
and	O
HGST	O
drives	O
at	O
the	O
time	O
that	O
keeps	O
the	O
heads	O
from	O
ever	O
having	O
to	O
touch	O
the	O
platters	O
and	O
drastically	O
improving	O
the	O
rated	O
start/stop	O
cycle	O
count	O
.	O
</s>
<s>
The	O
same	O
design	O
was	O
later	O
re-used	O
in	O
Seagate	O
's	O
enterprise	O
hard	B-Device
drives	I-Device
.	O
</s>
<s>
The	O
Barracuda	O
LP	O
series	O
also	O
present	O
firmware	B-Application
issues	O
that	O
might	O
be	O
alleviated	O
by	O
the	O
latest	O
firmware	B-Application
available	O
on	O
the	O
Seagate	O
web	O
site	O
(	O
CC35	O
)	O
,	O
although	O
there	O
are	O
reports	O
that	O
drives	O
with	O
the	O
CC35	O
firmware	B-Application
loaded	O
continue	O
to	O
exhibit	O
the	O
same	O
problems	O
as	O
earlier	O
firmware	B-Application
releases	O
.	O
</s>
<s>
The	O
most	O
commonly	O
referred	O
issue	O
with	O
the	O
Barracuda	O
LP	O
series	O
drives	O
appears	O
to	O
be	O
one	O
variation	O
or	O
another	O
of	O
the	O
infamous	O
click	B-Error_Name
of	I-Error_Name
death	I-Error_Name
problem	O
;	O
the	O
drive	O
will	O
start	O
to	O
emit	O
a	O
regular	O
clicking	O
noise	O
at	O
some	O
point	O
in	O
its	O
early	O
life	O
(	O
possibly	O
even	O
at	O
first	O
start	O
)	O
and	O
after	O
some	O
time	O
will	O
fail	O
altogether	O
,	O
often	O
after	O
a	O
few	O
months	O
of	O
use	O
.	O
</s>
<s>
While	O
the	O
clicking	O
noise	O
is	O
emitted	O
,	O
the	O
hard	B-Device
drive	I-Device
is	O
inaccessible	O
and	O
may	O
prevent	O
the	O
BIOS	O
from	O
detecting	O
it	O
.	O
</s>
<s>
There	O
is	O
also	O
a	O
CC95	O
firmware	B-Application
(	O
at	O
least	O
some	O
of	O
those	O
drives	O
came	O
as	O
part	O
of	O
external	O
Seagate	B-Device
FreeAgent	I-Device
drives	O
)	O
,	O
but	O
it	O
is	O
not	O
clear	O
whether	O
this	O
build	O
fixes	O
all	O
known	O
issues	O
,	O
and	O
why	O
firmware	B-Application
versions	O
between	O
CC35	O
and	O
CC95	O
do	O
not	O
seem	O
to	O
exist	O
.	O
</s>
<s>
First	O
Seagate	O
hard	B-Device
drives	I-Device
with	O
1TB	O
per	O
platter	O
technology	O
.	O
</s>
<s>
One	O
model	O
in	O
particular	O
,	O
ST3000DM001	B-Device
,	O
is	O
notable	O
for	O
its	O
high	O
failure	O
rate	O
,	O
frequently	O
experiencing	O
bad	O
sector	O
growth	O
and	O
head	O
crashes	O
.	O
</s>
<s>
Currently	O
listed	O
BarraCuda	O
drives	O
mostly	O
use	O
shingled	B-Device
magnetic	I-Device
recording	I-Device
(	O
SMR	O
)	O
technology	O
to	O
write	O
data	O
onto	O
platters	O
,	O
and	O
spin	O
up	O
at	O
5400	O
RPM	O
(	O
exception	O
is	O
model	O
ST2000DM008	O
,	O
which	O
spins	O
up	O
at	O
7200	O
RPM	O
while	O
utilizing	O
SMR	O
technology	O
)	O
.	O
</s>
<s>
500	O
GB	O
and	O
1	O
TB	O
models	O
still	O
use	O
perpendicular	B-Device
magnetic	I-Device
recording	I-Device
technology	O
and	O
spin	O
at	O
7200	O
RPM	O
,	O
but	O
they	O
also	O
do	O
not	O
feature	O
load/unload	O
ramps	O
,	O
instead	O
using	O
contact	O
start/stop	O
technology	O
.	O
</s>
<s>
All	O
models	O
spin	O
up	O
at	O
7200	O
RPM	O
,	O
have	O
512	O
bytes	O
per	O
sector	O
and	O
write	O
data	O
onto	O
platter	O
using	O
perpendicular	B-Device
magnetic	I-Device
recording	I-Device
technology	O
.	O
</s>
