Many
design
characteristics
of
the
DS8000
and
the
data
copying
and
mirroring
capabilities
of
the
Copy
Services
features
contribute
to
the
protection
of
your
data,
24
hours
a
day
and
seven
days
a
week.
The
following
information
provides
a
brief
description
of
each
of
these
licensed
features.
You
can
manage
Copy
Services
functions
through
the
command-line
interface
called
the
IBM
TotalStorage
DS
CLI
and
the
Web-based
interface
called
the
IBM
TotalStorage
DS
Storage
Manager.
The
DS
Storage
Manager
allows
you
to
set
up
and
manage
the
following
data-copy
features
from
anywhere
that
network
access
is
available.
Point-in-time
copy
The
point-in-time
copy
feature,
which
includes
FlashCopy,
enables
you
to
create
full
volume
copies
of
data
using
source
and
target
volumes
that
span
logical
subsystems
within
a
single
storage
unit.
After
the
FlashCopy
function
completes,
you
can
immediately
access
both
the
source
and
target
copies.
Remote
Mirror
and
Copy
The
remote
mirror
and
copy
(previously
known
as
Peer-to-Peer
Remote
Copy
or
PPRC)
feature
copies
data
between
volumes
on
two
or
more
storage
units.
When
your
host
system
performs
I/O
operations,
the
source
volume
is
copied
(mirrored)
to
the
target
volume
automatically.
After
you
create
a
remote
mirror
and
copy
relationship
between
a
source
volume
and
a
target
volume,
the
target
volume
continues
to
be
updated
with
changes
from
the
source
volume
until
you
remove
the
relationship
between
the
volumes.
The
following
functions
of
remote
mirror
and
copy
are
available:
v
IBM
TotalStorage
Metro
Mirror
(previously
known
as
Synchronous
PPRC)
v
IBM
TotalStorage
Global
Copy
(previously
known
as
PPRC
Extended
Distance)
v
IBM
TotalStorage
Global
Mirror
(previously
known
as
Asynchronous
PPRC)
Remote
mirror
for
z/OS
z/OS
Global
Mirror
(previously
known
as
Extended
Remote
Copy
or
XRC)
provides
a
long-distance
remote
copy
solution
across
two
sites
for
open
systems
and
z/OS
data
using
asynchronous
technology.
It
is
based
on
the
existing
Copy
Services
functions
called
Global
Copy
and
FlashCopy
and
additional
new
functions
that
form
consistency
groups
across
one
or
more
storage
units
to
manage
and
control
Global
Mirror
sessions.
Consider
the
following
Copy
Services
information:
v
The
licenses
for
Copy
Services
features
(remote
mirror
and
copy
and
point-in-time
copy)
must
be
activated
in
the
DS
Storage
Manager
before
you
can
begin
using
the
features.
v
A
Copy
Services
domain,
configured
as
part
of
the
IBM
TotalStorage
Enterprise
Storage
Server
®
(ESS)
Models
750
and
800,
is
supported
on
the
DS8000
storage
unit.
IBM
TotalStorage
Resiliency
Family
IBM
TotalStorage
Resiliency
Family
is
a
set
of
products
and
features
that
are
designed
to
help
you
implement
storage
solutions
that
keep
your
business
running
24
hours
a
day,
7
days
a
week.
Chapter
8.
Optional
feature
codes
for
the
DS8000
105
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