Management
window.
The
default
DS4000
storage
subsystem
entry
still
displays,
but
shows
an
“unresponsive”
icon.
8.
If
applicable,
change
the
IP
address
of
the
Ethernet
port
in
the
management
station
to
a
value
that
is
on
the
same
TCP/IP
subnet
as
the
controller
Ethernet
port
IP
addresses
that
you
just
assigned.
Exit
DS4000
Storage
Manager,
then
restart.
9.
Add
a
new
storage
subsystem
entry
in
the
Enterprise
Management
window,
using
the
new
assigned
IP
addresses.
Note:
To
manage
storage
subsystems
through
a
firewall,
configure
the
firewall
to
open
port
2463
to
TCP
data.
Controller
memory
Each
RAID
controller
has
up
to
8
GB
of
data
cache
memory,
for
a
total
of
up
to
16
GB
cache
memory
per
DS4800.
Each
RAID
controller
also
has
a
total
of
either
512
MB
(for
models
80A/H,
82A/H
or
84A/H)
or
1024
MB
(for
models
88A/H)
of
Intel
Pentium
Xeon
processor
memory.
The
processor
memory
stores
the
controller
firmware,
while
the
data
cache
is
a
buffer
used
to
temporarily
store
hard
disk
drive
data
during
data
read
and
write
operations.
A
Cache
Active
LED
on
the
controller
turns
on
when
the
cache
contains
data
that
has
not
been
written
to
hard
disk
drives.
The
Cache
Active
LED
turns
off
when
the
cache
does
not
contain
unwritten
data.
lists
the
technical
specifications
for
the
RAID
controllers.
Table
6.
RAID
controller
specifications
Category
Criteria
Specification
Memory
Cache
size
2
GB,
4
GB
or
8
GB,
depending
on
the
model
Interface
Fibre
channel
host
port
4
fiber-optic
ports
per
controller
2
Ethernet
ports
per
controller
(for
out-of-band
management)
Fibre
channel
drive
expansion
port
4
fiber-optic
ports
per
controller
Note:
Each
DS4800
controller
drive
channel
has
two
ports.
There
are
two
drive
channels
per
DS4800
controller.
Storage
Expansion
Enclosure
Support
Redundant
drive
channel
pairs
2
per
controller
Maximum
number
of
drives
per
redundant
drive
channel
pair
112
drives
per
redundant
drive
channel
pair
(either
8
storage
expansion
enclosures
with
14
drives
each
or
7
storage
expansion
enclosures
with
16
drives
each).
See
Maximum
number
of
drives
supported
by
one
DS4800
224
drives
(2
redundant
drive
channel
pairs
with
112
drives
in
each
drive
channel
pair)
16
IBM
System
Storage
DS4800
Storage
Subsystem:
Installation,
User’s,
and
Maintenance
Guide
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Содержание TotalStorage DS4800
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