![background image](http://html1.mh-extra.com/html/ibm/totalstorage-ds8000/totalstorage-ds8000_user-manual_4109708150.webp)
recording
is
enabled,
only
change
data
is
sent
to
the
production
site
to
synchronize
the
volumes,
thereby
reducing
the
time
that
is
required
to
complete
the
failback
operation.
When
it
is
safe
to
return
to
your
production
site,
assuming
that
no
physical
damage
has
occurred
to
the
storage
unit
in
the
location,
you
can
delete
paths
and
create
new
ones
from
your
production
site
to
your
recovery
site.
Then,
you
can
create
a
failback
recovery
request
to
restore
the
storage
unit
as
the
production
storage
unit
in
the
relationship.
The
following
considerations
are
for
failover
and
failback
operations:
v
The
failover
operation
does
not
reverse
the
direction
of
a
remote
mirror
and
copy
pair.
It
changes
a
target
device
into
a
suspended
source
device,
while
leaving
the
source
device
in
its
current
state.
v
The
failback
recovery
operation
can
be
issued
against
any
remote
mirror
and
copy
volume
that
is
in
a
primary
suspended
state.
The
operation
copies
required
data
from
the
source
volume
to
the
target
volume
in
order
to
resume
mirroring.
Failback
operations
are
commonly
used
after
a
failover
operation
has
been
issued
to
restart
mirroring
either
in
the
reverse
direction
(remote
site
to
local
site)
or
in
the
original
direction
(local
site
to
remote
site).
z/OS
Copy
Services
Copy
Services
functions
are
also
supported
in
a
z/OS
environment.
These
functions
allow
you
to
create
a
point-in-time
copy
or
to
mirror
data
at
your
remote
or
recovery
site
as
applications
make
changes
to
the
source
volumes
at
your
production
site.
z/OS
Copy
Services
includes
the
following
functions:
v
z/OS
Global
Mirror
v
z/OS
Metro/Global
Mirror
z/OS
Global
Mirror
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.
DS8000
storage
complexes
support
the
z/OS
Global
Mirror
function
only
on
zSeries
hosts.
The
z/OS
Global
Mirror
function
mirrors
data
on
the
storage
unit
to
a
remote
location
for
disaster
recovery.
It
protects
data
consistency
across
all
volumes
that
you
have
defined
for
mirroring.
The
volumes
can
reside
on
several
different
storage
units.
The
z/OS
Global
Mirror
function
can
mirror
the
volumes
over
several
thousand
kilometers
from
the
source
site
to
the
target
recovery
site.
With
z/OS
Global
Mirror,
you
can
suspend
or
resume
service
during
an
outage.
You
do
not
have
to
end
your
current
data-copy
session.
You
can
suspend
the
session,
and
then
restart
it.
Only
data
that
changed
during
the
outage
must
be
resynchronized
between
the
copies.
If
you
must
change
the
default
setting
for
an
outage,
you
can
do
so
through
the
DS
Storage
Manager.
See
the
DS
Storage
Manager
online
help
for
more
information.
IBM
service
representatives
must
identify
and
set
up
the
DS8000
Copy
Services
servers
before
you
can
use
the
DS8000
Copy
Services
Web
interface.
124
DS8000
User’s
Guide
Содержание TotalStorage DS8000
Страница 1: ...IBM TotalStorage DS8000 User s Guide SC26 7623 03...
Страница 2: ......
Страница 3: ...IBM TotalStorage DS8000 User s Guide SC26 7623 03...
Страница 10: ...viii DS8000 User s Guide...
Страница 12: ...x DS8000 User s Guide...
Страница 14: ...xii DS8000 User s Guide...
Страница 24: ...Department 61C 9032 South Rita Road TUCSON AZ 85775 4401 xxii DS8000 User s Guide...
Страница 26: ...xxiv DS8000 User s Guide...
Страница 50: ...24 DS8000 User s Guide...
Страница 116: ...90 DS8000 User s Guide...
Страница 120: ...94 DS8000 User s Guide...
Страница 152: ...126 DS8000 User s Guide...
Страница 166: ...140 DS8000 User s Guide...
Страница 184: ...158 DS8000 User s Guide...
Страница 186: ...160 DS8000 User s Guide...
Страница 192: ...Taiwan class A compliance statement VS07171L 166 DS8000 User s Guide...
Страница 227: ......
Страница 228: ...Printed in USA SC26 7623 03...