d.
You
have
a
mixed
list
of
FlashCopy
relationships,
some
are
restorable
and
some
are
nonrestorable.
The
sequence
numbers
of
the
relationships
that
are
restorable
all
have
the
same
sequence
number.
The
sequence
numbers
of
the
relationships
that
are
nonrestorable
are
all
equal,
but
they
have
a
different
number
from
the
sequence
number
of
those
that
are
restorable.
Issue
a
FlashCopy
Commit
changes
command
to
all
the
FlashCopy
relationships
in
the
consistency
group
that
are
restorable.
e.
You
have
a
mixed
list
of
FlashCopy
relationships,
some
are
restorable
and
some
are
nonrestorable.
The
sequence
numbers
are
not
the
same
within
each
type
of
relationship.
The
recovery
plan
cannot
continue.
The
Global
Mirror
process
has
been
corrupted.
If
the
Global
Mirror
process
has
been
corrupted
you
must
recover
your
data
using
your
last
good
backup.
Note:
When
the
state
of
all
the
FlashCopy
relationships
are
known,
you
might
want
to
initiate
a
tape
backup
of
Volume
C.
4.
Issue
the
fast
reverse
restore
process
from
the
C
volumes
to
the
B
volumes,
selecting
the
Initiate
background
copy
option.
Note:
a.
When
you
initiate
the
fast
reverse
restore
process,
Volume
C
becomes
unusable.
b.
There
must
be
no
I/O
allowed
to
the
B
or
C
volumes
during
the
fast
reverse
restore
process.
c.
If
you
do
not
want
to
use
the
fast
reverse
restore
process,
use
the
Recovering
from
a
disaster
without
using
fast
reverse
restore
procedure
instead
of
this
step.
5.
Wait
for
the
background
copy
to
complete
before
continuing
to
the
next
step.
The
C
to
B
FlashCopy
relationship
ends
when
the
background
copy
completes.
6.
Initiate
the
FlashCopy
from
Volume
B
back
to
Volume
C.
Ensure
that
you
also
select
the
Enable
Change
Recording
and
Inhibit
writes
to
target
volume
options.
This
creates
a
backup
copy
of
the
consistency
group
before
applications
begin
to
update
the
B
volumes.
7.
Start
the
host
I/O
at
the
remote
site
on
the
B
volumes.
You
will
remain
in
production
on
the
remote
site
in
this
configuration
until
you
are
ready
to
return
production
to
the
local
site.
8.
When
you
are
ready
to
return
production
to
the
local
site,
perform
the
recovery
failback
(B->A)
to
resynchronize
the
A
volumes.
The
application
at
the
remote
site
remains
active.
9.
After
the
resynchronize
process
has
completed
its
first
pass,
quiesce
the
applications
at
your
remote
site
so
that
the
resynchronization
can
complete.
10.
When
the
resynchronization
has
completed
(no
out-of-sync
tracks),
perform
recovery
failover
and
failback
with
Global
Copy
on
Volume
A
to
re-create
the
Volume
A
to
Volume
B
Metro
Mirror
relationship.
11.
Start
the
host
I/O
at
the
local
site
on
the
A
volumes.
12.
Resume
the
Global
Mirror
process.
Recovering
with
and
without
the
fast
reverse
restore
feature
The
fast
reverse
restore
feature,
when
used
with
Global
Mirror
functions,
allows
a
FlashCopy
relationship
to
be
reversed
without
waiting
for
the
background
copy
of
the
original
FlashCopy
to
complete.
Chapter
10.
Disaster
recovery
using
Copy
Services
151
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