<s>
HD	B-Application
Tach	I-Application
is	O
a	O
software	O
program	O
for	O
Microsoft	B-Application
Windows	I-Application
(	O
2000	O
or	O
XP	B-Application
)	O
that	O
tests	O
and	O
graphs	O
the	O
sequential	O
read	O
,	O
random	B-General_Concept
access	I-General_Concept
and	O
interface	O
burst	O
speeds	O
of	O
attached	O
storage	O
devices	O
(	O
hard	B-Device
drive	I-Device
,	O
flash	B-Device
drive	I-Device
,	O
removable	B-Device
drive	I-Device
etc	O
.	O
)	O
.	O
</s>
<s>
Drive	O
technologies	O
such	O
as	O
SCSI	B-Architecture
,	O
IDE/ATA	B-Protocol
,	O
IEEE	B-Protocol
1394	I-Protocol
,	O
USB	B-Protocol
,	O
SATA	O
and	O
RAID	B-Architecture
are	O
supported	O
.	O
</s>
<s>
On	O
December	O
5	O
,	O
2011	O
,	O
citing	O
the	O
lack	O
of	O
time	O
to	O
devote	O
to	O
the	O
project	O
,	O
Simpli	O
Software	O
formally	O
announced	O
on	O
its	O
website	O
that	O
HD	B-Application
Tach	I-Application
had	O
reached	O
end-of-life	O
and	O
was	O
no	O
longer	O
being	O
supported	O
.	O
</s>
<s>
The	O
latest	O
version	O
of	O
this	O
application	O
(	O
3.0.4.0	O
)	O
is	O
not	O
fully	O
compatible	O
with	O
Windows	B-Application
Vista	I-Application
,	O
Windows	B-Device
7	I-Device
,	O
or	O
Windows	B-Application
8	I-Application
.	O
</s>
<s>
However	O
,	O
HD	B-Application
Tach	I-Application
works	O
in	O
these	O
operating	O
systems	O
by	O
running	O
it	O
in	O
Windows	B-Application
XP	I-Application
SP2	O
or	O
SP3	O
compatibility	O
mode	O
.	O
</s>
<s>
HD	B-Application
Tach	I-Application
2.70	O
is	O
the	O
last	O
version	O
to	O
work	O
on	O
Windows	B-Application
NT	O
4.0	O
.	O
</s>
<s>
HD	B-Application
Tach	I-Application
was	O
originally	O
developed	O
by	O
TCD	O
Labs	O
,	O
Inc	O
.	O
</s>
