Retaining
the
UUID
The
Universally
Unique
Identifier
(UUID)
is
a
128-bit
number
uniquely
assigned
to
your
computer
at
production
and
stored
in
the
EEPROM
of
your
system
board.
The
algorithm
that
generates
the
number
is
designed
to
provide
unique
IDs
until
the
year
A.D.
3400.
No
two
computers
in
the
world
have
the
same
number.
When
you
replace
the
system
board,
you
must
set
the
UUID
on
the
new
system
board
as
follows:
1.
Install
the
ThinkPad
Hardware
Maintenance
Diskette
Version
1.69,
and
restart
the
computer.
2.
From
the
main
menu,
select
4.
Assign
UUID
.
A
new
UUID
is
created
and
written.
If
a
valid
UUID
already
exists,
it
is
not
overwritten.
FRU
replacement
notices
ThinkPad
X40
71
