Acsls, scsi and 349x tape library sharing, Acsls, Scsi – IBM TIVOLI SC32-0129-00 User Manual
Page 24: 349x, Tape, Library, Sharing
v
Cluster
environment.
See
the
Redbook
IBM
Tivoli
Storage
Manager
in
a
Clustered
Environment
for
details
on
configuring
the
storage
agent
in
an
HACMP
™
environment.
ACSLS,
SCSI
and
349X
Tape
Library
Sharing
When
Tivoli
Storage
Manager
servers
share
an
ACSLS,
SCSI
tape,
or
349X
storage
device
using
a
library
manager
and
library
clients,
one
server,
the
library
manager,
owns
and
controls
the
tape
library
device.
The
library
manager
operations
include
checking
volumes
into
and
out
of
the
library,
labeling
volumes,
mounting
and
dismounting
volumes,
auditing
volumes,
and
tracking
an
inventory
of
library
contents.
The
storage
agents,
along
with
other
Tivoli
Storage
Manager
servers
that
share
this
library,
are
considered
library
clients.
As
a
library
client,
the
storage
agent
is
able
to
store
data
and
request
drives,
tapes,
and
volumes.
When
the
Tivoli
Storage
Manager
server
(data
manager
server)
is
also
the
library
manager
for
the
devices
where
data
is
stored
by
the
storage
agent,
then
the
storage
agent
communicates
requests
to
this
Tivoli
Storage
Manager
server.
When
the
Tivoli
Storage
Manager
server
(data
manager
server)
is
another
library
client,
then
the
storage
agent
communicates
requests
for
itself
or
the
metadata
server
directly
to
the
library
manager.
Note
that
when
using
a
shared
ACSLS
library,
the
library
manager
must
be
a
Tivoli
Storage
Manager
server
on
AIX,
Solaris,
or
Windows.
A
library
client
requests
shared
library
resources,
such
as
drives
or
media,
from
the
library
manager,
but
uses
the
resources
independently.
The
library
manager
coordinates
the
access
to
these
resources.
Data
moves
over
the
SAN
between
the
storage
device
and
either
the
library
manager
or
the
library
client.
Either
the
library
manager
or
any
library
client
can
manage
the
LAN-free
movement
of
client
data
as
long
as
the
client
system
includes
a
storage
agent.
In
this
library-sharing
environment,
the
most
important
relationship
is
the
one
between
the
server
and
the
storage
agent.
The
server,
working
in
conjunction
with
the
storage
agent,
manages
the
storage
hierarchy.
The
server
could
be
a
library
client
or
library
manager,
and
it
is
responsible
for:
v
Migrations
v
Expiration
of
files
based
on
policy
information
v
Reclamation
of
free
space
on
volumes
and
consolidation
of
the
volumes
v
Disaster
recovery
The
storage
agent
contributes
information
to
the
storage
hierarchy
through
various
operations,
but
this
role
is
independent
of
the
library
sharing
role.
The
library
manager
and
library
client
configurations
are
represented
in
and
6
IBM
Tivoli
Storage
Manager
for
SAN
for
AIX:
Storage
Agent
User’s
Guide
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