Dell EqualLogic PS6610ES EqualLogic PS6610 Storage Arrays Hardware Owners Manu - Page 21

Control, Module, Maintenance

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3 Control Module Maintenance The control modules in a PS Series array contain the PS Series firmware, which provides the Group Manager GUI, the command-line interface (CLI), and all the array and storage management functions and features. Ideally, an array has two control modules (which must be of the same type) to avoid a single point of failure for the array. The PS6610 array includes two hot-swappable Type 18 control modules. One functioning control module is required for array operation. You access control modules from the rear of the array. Control Module Features The Type 18 control module includes: • Two pairs of Ethernet ports with two shared LEDs indicating status and activity: - One pair of 10GBASE-T ports, labeled Ethernet 0 and Ethernet 1 - One pair of SFP+ ports, labeled Ethernet 0 and Ethernet 1 Note: Only one of two ports with the same numbered port can be used at a time. If both ports are attached to an active switch, the control module will prefer to communicate over the SFP+ interface. • One 10Mb/100Mbps port, labeled MANAGEMENT, for use only if you configure a management network. The management port has two LEDs to indicate status and activity. See Configure the Management Port on page 37 for more information. • A column of LEDs labeled PWR (power), ERR (error condition) and ACT (activity) that indicate the status of the control module. • A recessed button labeled STANDBY ON/OFF that allows you to quickly shut down the array in certain circumstances. See About the Standby On/Off Button on page 19 for more information. • One serial port (for use if there is no network access to the array). • A field-replaceable microSD card containing the PS Series firmware. The microSD card is accessed from the rear of the control module. • A release button and latch to release the control module from the array for replacement. The release lever has a switch that detects activation and prompts the array to save data to nonvolatile storage, thereby protecting your data. Note: Do not mix control module types in an array. Always make sure both control modules are the same type and color. See the latest PS Series Release Notes for information about other supported control modules. About Control Module Configurations While an array can run using only one control module, it is not recommended because this configuration creates a single point of failure. If the control module fails and no other module can take over, all access to your volumes stops until the failure is repaired or the control module is replaced. Only one control module is active (providing disk access and serving network traffic) at one time. The secondary (redundant) control module mirrors cache data from the active control module. If the active control module fails, all functions of the primary controller transfer to the secondary. 15

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3
Control
Module
Maintenance
The
control
modules
in
a
PS
Series
array
contain
the
PS
Series
firmware,
which
provides
the
Group
Manager
GUI,
the
command-line
interface
(CLI),
and
all
the
array
and
storage
management
functions
and
features.
Ideally,
an
array
has
two
control
modules
(which
must
be
of
the
same
type)
to
avoid
a
single
point
of
failure
for
the
array.
The
PS6610
array
includes
two
hot-swappable
Type
18
control
modules.
One
functioning
control
module
is
required
for
array
operation.
You
access
control
modules
from
the
rear
of
the
array.
Control
Module
Features
The
Type
18
control
module
includes:
•
Two
pairs
of
Ethernet
ports
with
two
shared
LEDs
indicating
status
and
activity:
–
One
pair
of
10GBASE-T
ports,
labeled
Ethernet
0
and
Ethernet
1
–
One
pair
of
SFP+
ports,
labeled
Ethernet
0
and
Ethernet
1
Note:
Only
one
of
two
ports
with
the
same
numbered
port
can
be
used
at
a
time.
If
both
ports
are
attached
to
an
active
switch,
the
control
module
will
prefer
to
communicate
over
the
SFP+
interface.
•
One
10Mb/100Mbps
port,
labeled
MANAGEMENT,
for
use
only
if
you
configure
a
management
network.
The
management
port
has
two
LEDs
to
indicate
status
and
activity.
See
Configure
the
Management
Port
on
page
37
for
more
information.
•
A
column
of
LEDs
labeled
PWR
(power),
ERR
(error
condition)
and
ACT
(activity)
that
indicate
the
status
of
the
control
module.
•
A
recessed
button
labeled
STANDBY
ON/OFF
that
allows
you
to
quickly
shut
down
the
array
in
certain
circumstances.
See
About
the
Standby
On/Off
Button
on
page
19
for
more
information.
•
One
serial
port
(for
use
if
there
is
no
network
access
to
the
array).
•
A
field-replaceable
microSD
card
containing
the
PS
Series
firmware.
The
microSD
card
is
accessed
from
the
rear
of
the
control
module.
•
A
release
button
and
latch
to
release
the
control
module
from
the
array
for
replacement.
The
release
lever
has
a
switch
that
detects
activation
and
prompts
the
array
to
save
data
to
non-
volatile
storage,
thereby
protecting
your
data.
Note:
Do
not
mix
control
module
types
in
an
array.
Always
make
sure
both
control
modules
are
the
same
type
and
color.
See
the
latest
PS
Series
Release
Notes
for
information
about
other
supported
control
modules.
About
Control
Module
Configurations
While
an
array
can
run
using
only
one
control
module,
it
is
not
recommended
because
this
configuration
creates
a
single
point
of
failure.
If
the
control
module
fails
and
no
other
module
can
take
over,
all
access
to
your
volumes
stops
until
the
failure
is
repaired
or
the
control
module
is
replaced.
Only
one
control
module
is
active
(providing
disk
access
and
serving
network
traffic)
at
one
time.
The
secondary
(redundant)
control
module
mirrors
cache
data
from
the
active
control
module.
If
the
active
control
module
fails,
all
functions
of
the
primary
controller
transfer
to
the
secondary.
15