<s>
TestDisk	B-Application
is	O
a	O
free	B-License
and	I-License
open-source	I-License
data	B-Application
recovery	I-Application
utility	O
that	O
helps	O
users	O
recover	O
lost	O
partitions	B-Application
or	O
repair	O
corrupted	O
filesystems	O
.	O
</s>
<s>
TestDisk	B-Application
can	O
collect	O
detailed	O
information	O
about	O
a	O
corrupted	O
drive	O
,	O
which	O
can	O
then	O
be	O
sent	O
to	O
a	O
technician	O
for	O
further	O
analysis	O
.	O
</s>
<s>
TestDisk	B-Application
supports	O
DOS	B-Device
,	O
Microsoft	B-Application
Windows	I-Application
(	O
i.e.	O
</s>
<s>
NT	B-Device
4.0	I-Device
,	O
2000	B-Application
,	O
XP	B-Application
,	O
Server	B-Application
2003	I-Application
,	O
Server	B-Device
2008	I-Device
,	O
Vista	B-Application
,	O
Windows	B-Device
7	I-Device
,	O
Windows	B-Device
8.1	I-Device
,	O
Windows	B-Operating_System
10	I-Operating_System
)	O
,	O
Linux	B-Application
,	O
FreeBSD	B-Operating_System
,	O
NetBSD	B-Device
,	O
OpenBSD	B-Operating_System
,	O
SunOS	B-Operating_System
,	O
and	O
MacOS	B-Application
.	O
</s>
<s>
TestDisk	B-Application
handles	O
non-partitioned	O
and	O
partitioned	O
media	O
.	O
</s>
<s>
In	O
particular	O
,	O
it	O
recognizes	O
the	O
GUID	B-Application
Partition	I-Application
Table	I-Application
(	O
GPT	O
)	O
,	O
Apple	B-Application
partition	I-Application
map	I-Application
,	O
PC/Intel	O
BIOS	B-Operating_System
partition	B-Application
tables	O
,	O
Sun	B-Application
Solaris	I-Application
slice	B-Application
and	O
Xbox	B-Application
fixed	O
partitioning	B-Application
scheme	O
.	O
</s>
<s>
TestDisk	B-Application
uses	O
a	O
command	B-Application
line	I-Application
user	I-Application
interface	I-Application
.	O
</s>
<s>
TestDisk	B-Application
can	O
recover	O
deleted	O
files	O
with	O
97%	O
accuracy	O
.	O
</s>
<s>
TestDisk	B-Application
can	O
recover	O
deleted	O
partitions	B-Application
,	O
rebuild	O
partition	B-Application
tables	O
or	O
rewrite	O
the	O
master	B-Device
boot	I-Device
record	I-Device
(	O
MBR	O
)	O
.	O
</s>
<s>
TestDisk	B-Application
retrieves	O
the	O
LBA	B-Device
size	O
and	O
CHS	B-Device
geometry	O
of	O
attached	O
data	B-General_Concept
storage	I-General_Concept
devices	I-General_Concept
(	O
i.e.	O
</s>
<s>
hard	B-Device
disks	I-Device
,	O
memory	B-Device
cards	I-Device
,	O
USB	O
flash	O
drives	O
,	O
and	O
virtual	B-Application
disk	I-Application
images	O
)	O
from	O
the	O
BIOS	B-Operating_System
or	O
the	O
operating	B-General_Concept
system	I-General_Concept
.	O
</s>
<s>
TestDisk	B-Application
reads	O
sectors	O
on	O
the	O
storage	O
device	O
to	O
determine	O
if	O
the	O
partition	B-Application
table	O
or	O
filesystem	O
on	O
it	O
requires	O
repair	O
.	O
</s>
<s>
TestDisk	B-Application
can	O
perform	O
deeper	O
checks	O
to	O
locate	O
partitions	B-Application
that	O
have	O
been	O
deleted	O
from	O
a	O
storage	O
device	O
or	O
disk	B-Application
image	I-Application
.	O
</s>
<s>
However	O
,	O
it	O
is	O
up	O
to	O
the	O
user	O
to	O
look	O
over	O
the	O
list	O
of	O
possible	O
partitions	B-Application
found	O
by	O
TestDisk	B-Application
and	O
to	O
select	O
those	O
that	O
they	O
wish	O
to	O
recover	O
.	O
</s>
<s>
TestDisk	B-Application
can	O
deal	O
with	O
some	O
specific	O
logical	O
filesystem	O
corruption	O
.	O
</s>
<s>
TestDisk	B-Application
can	O
recover	O
deleted	O
files	O
especially	O
if	O
the	O
file	O
was	O
not	O
fragmented	O
and	O
the	O
clusters	O
have	O
not	O
been	O
reused	O
.	O
</s>
<s>
TestDisk	B-Application
can	O
be	O
used	O
in	O
digital	O
forensics	O
to	O
retrieve	O
partitions	B-Application
that	O
were	O
deleted	O
long	O
ago	O
.	O
</s>
<s>
It	O
can	O
mount	O
various	O
types	O
of	O
disk	B-Application
images	I-Application
including	O
the	O
Expert	O
Witness	O
File	O
Format	O
used	O
by	O
EnCase	O
.	O
</s>
<s>
Binary	O
disk	B-Application
images	I-Application
,	O
such	O
as	O
those	O
created	O
with	O
ddrescue	B-Language
can	O
be	O
read	O
by	O
TestDisk	B-Application
as	O
though	O
it	O
were	O
a	O
storage	O
device	O
.	O
</s>
<s>
In	O
TestDisk	B-Application
versions	O
prior	O
to	O
version	O
7	O
,	O
this	O
feature	O
could	O
be	O
exploited	O
to	O
inject	O
malicious	O
code	O
into	O
a	O
running	O
TestDisk	B-Application
application	O
on	O
Windows	O
.	O
</s>
<s>
File	O
system	O
support	O
for	O
TestDisk	B-Application
is	O
shown	O
in	O
the	O
table	O
:	O
</s>
