v
The
other
activities
that
are
occurring
on
the
DS8000
FlashCopy
supports
the
following
copy
options:
Consistency
groups
Creates
a
consistent
point-in-time
copy
of
multiple
volumes,
with
negligible
host
impact.
You
can
enable
FlashCopy
consistency
groups
from
the
command-line
interface
(DS
CLI).
Change
recording
Activates
the
change
recording
function
on
the
volume
pair
that
is
participating
in
a
FlashCopy
relationship.
This
enables
a
subsequent
refresh
to
the
target
volume.
Establish
FlashCopy
on
existing
Metro
Mirror
source
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.
Fast
reverse
Reverses
the
FlashCopy
relationship
without
waiting
for
the
finish
of
the
background
copy
of
the
previous
FlashCopy.
This
option
applies
to
the
Global
Mirror
mode.
Inhibit
writes
to
target
Ensures
that
write
operations
are
inhibited
on
the
target
volume
until
a
refresh
FlashCopy
operation
is
complete.
Multiple
Relationship
FlashCopy
Allows
a
source
volume
to
have
multiple
target
volumes
at
the
same
time.
Persistent
FlashCopy
Allows
the
FlashCopy
relationship
to
remain
even
after
the
FlashCopy
operation
completes.
You
must
explicitly
delete
the
relationship.
Refresh
target
volume
Provides
the
ability
to
“refresh”
a
FlashCopy
relationship,
without
recopying
all
tracks
from
the
source
volume
to
the
target
volume.
Reverse
restore
Reverses
the
FlashCopy
relationship
and
copies
data
from
the
target
volume
to
the
source
volume.
Reverse
FlashCopy
relationships
The
direction
of
a
FlashCopy
relationship
can
be
reversed,
in
which
case
the
volume
that
was
previously
defined
as
the
target
becomes
the
source
for
the
volume
that
was
previously
defined
as
the
source
(and
is
now
the
target).
The
data
that
has
changed
is
copied
to
the
volume
previously
defined
as
the
source.
You
can
reverse
a
FlashCopy
relationship
if
you
want
to
restore
a
source
volume
(Volume
A)
to
a
point-in-time
before
you
performed
a
FlashCopy
operation.
In
effect,
you
are
reversing
the
FlashCopy
operation
so
that
it
appears
as
though
no
FlashCopy
operation
ever
happened.
Keep
in
mind
that
the
background
copy
process
of
a
FlashCopy
operation
must
complete
before
you
can
reverse
volume
A
as
the
source
and
volume
B
as
the
target.
There
might
be
certain
circumstances
when
you
might
need
to
reverse
an
original
FlashCopy
relationship.
For
example,
suppose
you
create
a
FlashCopy
relationship
Chapter
8.
Optional
feature
codes
for
the
DS8000
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