<s>
Spinup	B-Device
Cycles	I-Device
(	O
also	O
called	O
CSS	O
,	O
"	O
on/off	O
cycles	O
"	O
or	O
"	O
power	O
cycles	O
"	O
)	O
is	O
a	O
value	O
that	O
hard	B-Device
disk	I-Device
manufacturers	O
give	O
for	O
the	O
average	O
times	O
a	O
hard	B-Device
drive	I-Device
can	O
spin	O
up	O
before	O
it	O
fails	B-Device
.	O
</s>
<s>
Usually	O
server	B-Application
hard	B-Device
disks	I-Device
are	O
specified	O
for	O
less	O
spinup	B-Device
cycles	I-Device
than	O
desktop	O
hard	B-Device
disks	I-Device
,	O
because	O
servers	O
are	O
only	O
very	O
rarely	O
rebooted	B-Operating_System
.	O
</s>
<s>
On	O
the	O
other	O
hand	O
,	O
server	B-Application
hard	B-Device
disks	I-Device
have	O
much	O
higher	O
MTBF	O
.	O
</s>
