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Migrating
data
between
storage
units
Migrating
data
between
storage
units
requires
the
use
of
Global
Copy
or
IBM
TotalStorage
Metro
Mirror.
Perform
this
process
to
migrate
data
between
storage
units.
1.
Establish
paths
between
all
Site
A
LSSs
and
Site
B
LSSs.
2.
Establish
all
necessary
volume
pairs
between
the
Site
A
storage
units
and
the
Site
B
storage
units.
You
can
use
either
the
Global
Copy
or
the
IBM
TotalStorage
Metro
Mirror
feature.
3.
Convert
the
pairs
to
IBM
TotalStorage
Metro
Mirror
after
the
bulk
copy
is
complete
if
you
use
Global
Copy.
4.
Ensure
that
all
remote
mirror
and
copy
volumes
are
in
duplex
state.
5.
Quiesce
the
applications
before
you
switch
to
the
new
volumes.
6.
End
all
remote
mirror
and
copy
pairs
across
all
storage
units.
7.
End
all
theremote
mirror
and
copy
paths
from
the
Site
A
storage
units
to
the
Site
B
storage
units.
8.
Resume
all
applications
that
point
to
devices
at
the
Site
B
storage
units.
Moving
workloads
when
migrating
data
between
storage
units
Moving
workloads
when
migrating
data
between
storage
units
requires
the
use
of
Global
Copy
or
IBM
TotalStorage
Metro
Mirror.
Perform
this
process
to
move
workloads
between
storage
units.
1.
Establish
paths
between
all
Site
A
LSSs
and
the
Site
B
LSSs.
2.
Establish
all
necessary
volume
pairs
between
the
Site
A
storage
units
and
the
Site
B
storage
units.
You
can
use
either
Global
Copy
or
IBM
TotalStorage
Metro
Mirror.
If
you
use
Global
Copy,
convert
the
pairs
to
IBM
TotalStorage
Metro
Mirror
after
the
bulk
copy
is
complete.
3.
Ensure
that
all
remote
mirror
and
copy
volumes
are
in
duplex
state.
4.
Quiesce
all
of
the
applications.
5.
End
all
remote
mirror
and
copy
pairs
across
all
ESSs.
6.
End
all
remote
mirror
and
copy
paths.
7.
Establish
remote
mirror
and
copy
paths
from
the
Site
B
storage
units
to
the
Site
A
storage
units.
8.
Establish
all
IBM
TotalStorage
Metro
Mirror
pairs
from
the
Site
B
storage
units
to
the
Site
A
storage
units.
9.
Suspend
all
remote
mirror
and
copy
pairs.
This
causes
the
storage
units
to
maintain
a
changed-track
bitmap
for
all
suspended
remote
mirror
and
copy
primary
volumes.
10.
Resume
all
the
Site
A
applications.
The
Site
A
applications
use
the
Site
B
storage
units
disks.
11.
Resume
all
the
Site
A
applications
that
use
the
Site
A
storage
units
disks.
Offloading
workloads
when
migrating
data
between
storage
units
Offloading
workloads
when
migrating
data
between
storage
units
requires
the
use
of
Global
Copy
or
IBM
TotalStorage
Metro
Mirror.
1.
Establish
paths
between
all
Site
A
LSSs
and
Site
B
LSSs.
2.
Establish
all
critical
volume
pairs
between
Site
A
storage
units
and
Site
B
storage
units,
using
either
Global
Copy
or
IBM
TotalStorage
Metro
Mirror.
138
DS8000
User’s
Guide
Содержание TotalStorage DS8000
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