IBM Partner Pavilion DS4100 Benutzerhandbuch
to
use
the
storage
server
(or
any
expansion
units
attached
to
the
storage
server)
until
you
finish
the
procedure.
You
must
use
this
method
on
RAID
0
logical
drives.
v
Replacing
the
drives
one
at
a
time
In
this
method,
you
manually
fail
each
drive,
replace
it,
and
wait
for
the
system
to
restore
data
to
the
new
drive
before
installing
the
next
drive.
After
you
install
the
new
drives,
you
can
configure
them
to
make
the
additional
drive
space
available.
See
the
procedure
in
Using
this
method,
you
can
replace
the
drives
while
the
storage
server
is
running,
eliminating
the
down
time
that
is
required
if
you
replace
all
the
drives
at
once.
However,
this
method
is
more
risky
because
you
can
lose
data
if
the
drive
restoration
or
storage
subsystem
reconfiguration
process
fails.
In
addition,
the
reconstruction
process
might
take
a
long
time.
This
method
works
only
on
redundant
logical
drives
(RAID
1,
3,
or
5).
You
cannot
use
this
method
with
any
drives
containing
RAID
0
logical
drives.
Consider
backing
up
your
data
if
you
use
this
method.
This
safeguards
your
data
if
the
restoration
and
reconfiguration
process
fails
or
the
new
drive
malfunctions.
The
method
you
use
depends
on
the
following
considerations:
v
Which
method
most
closely
matches
the
recommended
drive
upgrade
procedure
that
is
provided
in
the
operating
system
or
the
DS4000
Storage
Manager
client
documentation
v
Which
RAID
level
is
used
on
the
affected
drives
(RAID
0
requires
you
to
replace
all
the
drives
at
the
same
time)
v
How
much
downtime
is
acceptable
as
you
swap
the
drives
v
How
acceptable
is
the
risk
of
the
entire
array
failing
because
another
drive
that
is
part
of
the
array
has
failed
during
the
reconstruction
process
v
The
number
of
drives
in
an
array.
Replacing
drives
one
at
a
time
is
better
suited
for
arrays
consisting
of
3
to
5
drives.
If
you
have
more
than
10
drives,
consider
replacing
all
drives
at
the
same
time.
Replacing
all
drives
at
the
same
time
Use
this
procedure
to
replace
all
drives
at
the
same
time.
You
must
use
this
method
if
you
are
upgrading
drives
containing
RAID
0
logical
drives.
All
the
data
currently
on
the
drives
is
lost
when
you
replace
the
drives;
therefore,
you
must
back
up
all
data
that
is
currently
on
the
drives.
This
procedure
also
requires
you
to
turn
off
the
storage
server,
which
makes
the
storage
server
(and
any
attached
expansion
units)
inaccessible
to
other
users.
To
replace
all
the
drives
at
the
same
time,
perform
the
following
steps:
1.
Read
the
following
information:
v
The
information
in
particularly
the
paragraphs
that
discuss
the
differences
between
the
two
possible
upgrade
procedures
v
The
information
in
your
software
documentation
regarding
drive
upgrades
and
installation
v
The
documentation
that
comes
with
the
new
drives
Read
all
precautionary
notes,
kit
instructions,
and
other
information.
Kit
instructions
often
contain
the
most
current
information
regarding
the
drives
and
their
installation,
plus
upgrade
or
servicing
procedures.
Compare
the
kit
instructions
with
this
procedure
to
determine
if
you
need
to
modify
this
procedure.
84
IBM
TotalStorage
DS4100
Storage
Server:
Installation,
User’s,
and
Maintenance
Guide