![background image](http://html2.mh-extra.com/html/ibm/system-storage-ds6000-series/system-storage-ds6000-series_attachment-manual_3448319037.webp)
volume
and
target
volume.
A
FlashCopy
relationship
is
a
″
mapping
″
of
a
FlashCopy
source
volume
and
a
FlashCopy
target
volume.
This
mapping
allows
a
point-in-time
copy
of
the
source
volume
to
be
copied
to
the
target
volume.
The
FlashCopy
relationship
exists
between
the
volume
pair
from
the
time
that
you
initiate
a
FlashCopy
operation
until
the
DS6000
copies
all
data
from
the
source
volume
to
the
target
volume
or
until
you
delete
the
FlashCopy
relationship,
if
it
is
a
persistent
FlashCopy.
The
point-in-time
copy
that
is
created
by
FlashCopy
is
typically
used
when
you
need
a
copy
of
the
production
data
to
be
produced
with
minimal
application
downtime.
It
can
be
used
for
online
back
up,
testing
of
new
applications,
or
for
creating
a
database
for
data-mining
purposes.
The
copy
looks
exactly
like
the
original
source
volume
and
is
an
instantly
available,
binary
copy.
FlashCopy
supports
the
following
copy
options:
Data
Set
FlashCopy
Data
Set
FlashCopy
allows
a
FlashCopy
of
a
data
set
in
a
zSeries
environment.
Multiple
relationship
FlashCopy
Multiple
relationship
FlashCopy
allows
a
source
to
have
FlashCopy
relationships
with
multiple
targets
simultaneously.
This
flexibility
allows
you
to
establish
up
to
12
FlashCopy
relationships
on
a
given
logical
unit
number
(LUN),
volume,
or
data
set,
without
needing
to
first
wait
for
or
cause
previous
relationships
to
end.
Refresh
target
volume
(also
known
as
incremental
FlashCopy)
Refresh
target
volume
provides
the
ability
to
″
refresh
″
a
LUN
or
volume
involved
in
a
FlashCopy
relationship.
When
a
subsequent
FlashCopy
operation
is
initiated,
only
data
that
updates
the
target
and
the
source
to
the
same
point-in-time
state
is
copied.
The
direction
of
the
″
refresh
″
can
also
be
reversed.
The
LUN
or
volume
that
was
defined
as
the
target
can
now
become
the
source
for
the
LUN
or
the
volume
that
was
defined
as
the
source
(now
the
target).
Persistent
FlashCopy
Persistent
FlashCopy
allows
the
FlashCopy
relationship
to
remain
even
after
the
FlashCopy
operation
completes.
You
must
explicitly
delete
the
relationship.
Establish
FlashCopy
on
existing
Remote
Mirror
and
Copy
source
The
establish
FlashCopy
on
an
existing
Remote
Mirror
and
Copy
source
volume
option
allows
you
to
establish
a
FlashCopy
relationship
where
the
target
volume
is
also
the
source
of
an
existing
remote
mirror
and
copy
source
volume.
This
enables
you
to
create
full
or
incremental
point-in-time
copies
at
a
local
site
and
then
use
remote
mirroring
commands
to
copy
the
data
to
the
remote
site.
This
feature
is
represented
by
the
Establish
target
on
existing
Metro
Mirror
source
selection
in
the
GUI.
Consistency
group
commands
Consistency
group
commands
allow
the
DS6000
to
freeze
I/O
activity
to
a
LUN
or
volume
until
you
issue
the
FlashCopy
consistency
group
command.
Consistency
groups
help
create
a
consistent
point-in-time
copy
across
multiple
LUNs
or
volumes,
and
even
across
multiple
DS6000
systems.
This
function
is
available
through
the
use
of
command-line
interface
commands.
Chapter
1.
Introduction
7
Summary of Contents for System storage DS6000 Series
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