v
For
all
DS4000
models,
the
read/write
cache
should
be
enabled.
In
addition,
use
the
Storage
Subsystem
Profile
to
verify
that
cache
is
matched
between
the
controllers.
Web
pages
IBM
maintains
pages
on
the
World
Wide
Web
where
you
can
get
the
latest
technical
information
and
download
device
drivers
and
updates.
For
DS4000
information,
go
to
the
following
Web
site:
www.ibm.com/servers/storage/support/disk/
For
the
latest
information
about
operating
system
and
HBA
support,
clustering
support,
SAN
fabric
support,
and
Storage
Manager
feature
support,
see
the
TotalStorage
®
DS4000
Interoperability
Matrix
at
the
following
Web
site:
www.ibm.com/servers/storage/disk/ds4000/interop-matrix.html
Hardware
responsibilities
In
addition
to
the
Health
Check
steps
described
above,
regular
hardware
inspection
and
maintenance
helps
to
support
the
optimal
performance
of
your
DS4000
storage
configuration.
You
should
periodically
inspect
the
fibre
channel
components
of
your
DS4000
storage
configuration.
The
following
guidelines
are
suggested:
v
Maintain
an
up-to-date
storage
subsystem
profile
for
your
DS4000
storage
configuration.
Save
the
profile
to
a
server
disk
that
will
remain
accessible
in
case
of
a
DS4000
storage
configuration
failure.
Do
not
save
the
profile
only
to
a
LUN
in
the
DS4000
Storage
Subsystem.
v
Develop
a
change
management
plan.
The
plan
should
include
schedules
for
updating
subsystem
firmware
and
server
host
software.
Note:
Some
updates
might
require
storage
subsystem
downtime.
v
Use
IBM-approved
fibre
channel
cables
for
all
situations.
Note
in
your
configuration
documentation
whether
any
cables
are
not
IBM-approved.
v
Create
and
maintain
a
cabling
diagram
of
the
current
SAN
configuration.
Keep
this
diagram
updated
as
you
make
configuration
changes,
and
keep
the
cabling
diagram
available
for
review.
v
Create
and
maintain
a
list
of
other
components
that
are
being
used
within
the
cabling
diagram
(such
as
the
host
system,
fibre
channel
switches,
and
other
SAN
attachments).
v
Ensure
that
all
ESMs
are
properly
seated.
v
Ensure
that
all
drives
are
properly
seated.
v
Ensure
that
all
SFP
modules
are
properly
seated.
v
Confirm
fibre
channel
cable
loop
size.
(IBM
specifications
call
for
at
least
3-inch
cable
loops,
but
it
is
recommended
that
you
use
6-inch
cable
loops
or
longer.)
v
Ensure
proper
fibre
channel
cable
management.
v
Ensure
proper
air
flow
and
temperature
for
all
components
in
your
EXP810
storage
configuration.
Note:
You
can
find
details
on
many
of
these
inspection
and
maintenance
responsibilities
in
the
appropriate
sections
of
this
document.
Chapter
4.
Operating
the
storage
subsystem
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Summary of Contents for TotalStorage DS4300 Turbo
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