series
system.
Load
balancing
can
help
reduce
or
eliminate
I/O
bottlenecks
that
occur
when
many
I/O
operations
are
directed
to
common
devices
that
are
using
the
same
I/O
path.
The
SDD
also
helps
eliminate
a
potential
single
point
of
failure
by
automatically
rerouting
I/O
operations
when
a
path
failure
occurs,
thereby
supporting
enhanced
data
availability
capability.
IBM
TotalStorage
Management
Console
The
IBM
TotalStorage
Management
Console
is
the
focal
point
for
configuration,
copy
services
management,
and
maintenance
activities.
The
Management
Console
is
a
dedicated
workstation
that
is
physically
located
(installed)
inside
your
DS8100
and
DS8300
and
can
automatically
monitor
the
state
of
your
system,
notifying
you
and
IBM
when
service
is
required.
The
Management
Console
can
also
be
connected
to
your
network
to
enable
centralized
management
of
your
system
using
the
IBM
TotalStorage
DS
Command-Line
Interface
or
the
storage
management
software
that
uses
the
IBM
TotalStorage
DS
Open
API.
To
provide
continuous
availability
of
customer
access
to
the
management
console
functions,
having
a
second
management
console
is
recommended.
This
second
management
console
can
be
provided
in
two
ways:
v
External
(outside
the
2107)
-
This
console
is
generally
installed
in
the
customer-provided
rack.
It
uses
the
same
hardware
as
the
internal
management
console.
v
Internal
(a
second
management
console
that
resides
within
a
second
2107)
-
This
console
can
be
cabled
together
with
the
primary
internal
management
console
of
the
first
2107.’
Host
systems
that
the
storage
unit
supports
The
DS8000
storage
unit
provides
a
variety
of
host
attachments
so
that
you
can
consolidate
storage
capacity
and
workloads
for
open-systems
hosts,
S/390
hosts,
and
eServer
™
zSeries
hosts.
The
DS8100
Model
921
supports
a
maximum
of
16
host
adapters
and
4
device
adapter
pairs,
and
the
DS8300
Models
922
and
9A2
supports
a
maximum
of
32
host
adapters
and
8
device
adapter
pairs.
You
can
configure
the
storage
unit
for
any
of
the
following
system
adapter
types
and
protocols:
v
Fibre-channel
adapters,
for
support
of
fibre-channel
protocol
(FCP)
and
fibre
connection
(FICON
®
)
protocol
v
Enterprise
Systems
Connection
Architecture
®
(ESCON)
adapters
For
fibre-channel
attachments,
you
can
establish
zones.
The
zones
must
contain
a
single
port
that
is
attached
to
a
system
adapter
with
the
desired
number
of
ports
that
are
attached
to
the
storage
unit.
By
establishing
zones,
you
reduce
the
possibility
of
interactions
between
system
adapters
in
switched
configurations.
You
can
establish
the
zones
by
using
either
of
two
zoning
methods:
v
Port
number
v
Worldwide
port
name
(WWPN)
You
can
configure
switch
ports
that
are
attached
to
the
storage
unit
in
more
than
one
zone.
This
enables
multiple
system
adapters
to
share
access
to
the
storage
Chapter
1.
Introduction
to
IBM
TotalStorage
DS8000
series
11
Содержание TotalStorage DS8000
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