–
Model
conversions.
In
addition,
data
may
not
be
preserved
during
the
model
conversion.
–
Field
attachment
of
the
first
Model
92E
expansion
unit
to
a
Model
922.
–
Field
attachment
of
the
first
Model
9AE
expansion
unit
to
a
Model
9A2.
–
Removal
of
an
expansion
unit
model
from
the
base
unit
model.
Data
may
not
be
preserved
during
this
activity.
v
Some
DS8000
functions
are
not
available
or
supported
in
all
environments.
You
can
find
current
information
about
supported
environments,
prerequisites,
and
minimum
operating
systems
levels
at
the
following
IBM
Web
site:
http://www.ibm.com/servers/storage/disk/ds8000/interop.html
Planning
data
migration
The
planning
and
methods
of
data
migration
for
the
DS8000
vary
by
environment.
The
DS8000
supports
over
90
operating
systems.
You
can
migrate
data
to
a
storage
unit
from
these
host
and
operating
system
environments.
When
you
plan
for
data
migration,
consider
the
following
factors:
Note:
The
following
lists
do
not
cover
every
possibility.
They
provide
a
high-level
view
of
some
of
the
tools
and
factors
that
you
can
consider
when
moving
data.
v
The
system:
–
Is
it
UNIX
based?
You
will
probably
use
some
variation
of
a
logical
volume
manager.
–
Is
it
a
zSeries
or
S/390?
You
will
probably
use
IBM
®
TotalStorage
®
Global
Mirror,
Remote
Mirror
and
Copy
(when
available).
–
Is
it
z/OS?
You
will
probably
use
DFDSS,
though
there
are
many
choices.
–
Is
it
VM?
You
might
use
DASD
Dump
Restore
or
PTAPE.
–
Is
it
VSE?
You
might
use
the
VSE
fastcopy
or
ditto
commands.
Your
system
administrator
selects
the
data
migration
method
that
is
the
best
compromise
between
efficiency
and
impact
on
the
users
of
the
system.
v
The
storage
unit:
–
Are
the
storage
units
involved
the
same
with
the
same
level
of
licensed
management
code?
–
Are
the
storage
units
different?
In
which
case
you
want
to
ensure
that
the
new
configuration
is
large
enough
to
accommodate
the
existing
data.
You
also
want
to
ensure
that
the
virtual
disks
are
similar
in
configuration
to
the
disk
drives
that
they
are
replacing.
v
Time
and
complexity
involved:
–
Typically
data
migration
requires
that
updates
or
changes
cease
while
the
movement
occurs.
Also,
depending
on
the
amount
of
data
that
you
are
moving
and
your
migrating
method,
data
could
be
unavailable
for
an
extended
period
of
time,
perhaps
several
hours.
–
Could
the
complexity
and
time
involved
require
the
services
of
IBM
through
International
Global
Services?
Contact
your
IBM
representative
for
more
information.
How
to
select
a
data
migration
method
Your
system
administrator
selects
the
data
migration
method
that
is
the
best
compromise
between
efficiency
and
impact
on
the
users
of
the
system.
22
DS8000
User’s
Guide
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