the
opportunity
to
quickly
familiarize
yourself
with
the
major
aspects
of
the
DS6000
series
and
to
easily
recognize
the
topics
for
which
you
might
require
more
information.
It
provides
information
regarding
user
assistance
for
tasks,
concepts,
reference,
user
scenarios,
tutorials,
and
other
types
of
user
information.
Using
the
wonderful
search
tool
and
because
the
information
is
all
in
one
place
rather
than
across
multiple
publications,
you
can
access
the
information
that
you
need
more
efficiently
and
effectively.
Data
availability
features
This
section
provides
information
about
data
availability
features
that
are
supported
by
DS6000
series.
The
DS6000
series
provides
the
following
features:
v
RAID
implementation
v
Copy
services
v
Availability
support
for
open
systems,
iSeries,
zSeries,
and
pSeries
hosts
v
Component
redundancy
to
eliminate
single
points
of
hardware
failure,
and
no
single
point
of
repair
other
than
the
enclosure.
RAID
implementation
RAID
implementation
improves
data
storage
reliability
and
performance.
With
RAID
implementation,
the
DS6000
series
offers
fault-tolerant
data
storage
by
storing
the
same
data
in
different
places
on
multiple
disk
drive
modules
(DDMs).
By
placing
data
on
multiple
disks,
input/output
operations
can
overlap
in
a
balanced
way
to
improve
the
basic
reliability
and
performance
of
the
attached
storage
devices.
Physical
capacity
for
the
DS6000
series
can
be
configured
as
RAID
5,
RAID
10,
or
a
combination
of
both.
RAID
5
can
offer
excellent
performance
for
most
applications,
while
RAID
10
can
offer
better
performance
for
selected
applications,
in
particular,
high
random
write
content
applications
in
the
open
systems
environment.
Each
array
in
the
DS6000
series
is
composed
of
four
drives.
RAID
5
overview
RAID
5
is
a
method
of
spreading
volume
data
across
multiple
disk
drives.
The
DS6000
series
supports
RAID
5
arrays.
RAID
5
provides
faster
performance
by
striping
data
across
a
defined
set
of
DDMs.
Data
protection
is
provided
by
parity,
which
redundantly
saves
the
data
to
the
same
DDMs.
RAID
10
overview
RAID
10
provides
high
availability
by
combining
features
of
RAID
0
and
RAID
1.
The
DS6000
series
supports
RAID
10
arrays.
RAID
0
optimizes
performance
by
striping
volume
data
across
multiple
disk
drives
at
a
time.
RAID
1
provides
disk
mirroring
which
duplicates
data
between
two
disk
drives.
By
combining
the
features
of
RAID
0
and
RAID
1,
RAID
10
provides
a
second
optimization
for
fault
tolerance.
Data
is
striped
across
half
of
the
disk
drives
in
the
RAID
1
array,
and
the
other
half
of
the
array
mirrors
the
first
set
of
disk
drives.
Access
to
data
is
preserved
if
one
disk
in
each
mirrored
pair
remains
available.
Chapter
1.
Introduction
5
Summary of Contents for System storage DS6000 Series
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