Dell EqualLogic PS6610E EqualLogic PS6610 Storage Arrays Hardware Owners Manua - Page 22

Interpreting, Control, Module

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PS6610 Hardware Owner's Manual 3 Control Module Maintenance Dual Controller Configuration A dual control module configuration eliminates a single point of failure in the array. If the active control module fails, the secondary control module takes over automatically with no interruption of service. This automatic transition gives you time to replace the failed control module while your volumes and data remain accessible. In addition, a dual control module configuration supports a feature called vertical failover. An Ethernet port on the active control module can fail over to the same Ethernet port on the secondary control module if a network path fails. Both Ethernet ports on the control module can fail over. Figure 11 shows a recommended configuration for vertical failover. Figure 11: Recommended Network Configuration to Support Vertical Failover Note: If a network port is available for failover on either control module, but is not currently in use, its LEDs will not be lit. Note: Vertical failover is transparent to applications. Interpreting Control Module LEDs Control modules have the following LEDs: • The Ethernet ports and the management port each have LEDs that indicate the port's status and activity. See Table 8. 16

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PS6610
Hardware
Owner's
Manual
3
Control
Module
Maintenance
Dual
Controller
Configuration
A
dual
control
module
configuration
eliminates
a
single
point
of
failure
in
the
array.
If
the
active
control
module
fails,
the
secondary
control
module
takes
over
automatically
with
no
interruption
of
service.
This
automatic
transition
gives
you
time
to
replace
the
failed
control
module
while
your
volumes
and
data
remain
accessible.
In
addition,
a
dual
control
module
configuration
supports
a
feature
called
vertical
failover.
An
Ethernet
port
on
the
active
control
module
can
fail
over
to
the
same
Ethernet
port
on
the
secondary
control
module
if
a
network
path
fails.
Both
Ethernet
ports
on
the
control
module
can
fail
over.
Figure
11
shows
a
recommended
configuration
for
vertical
failover.
Figure
11:
Recommended
Network
Configuration
to
Support
Vertical
Failover
Note:
If
a
network
port
is
available
for
failover
on
either
control
module,
but
is
not
currently
in
use,
its
LEDs
will
not
be
lit.
Note:
Vertical
failover
is
transparent
to
applications.
Interpreting
Control
Module
LEDs
Control
modules
have
the
following
LEDs:
•
The
Ethernet
ports
and
the
management
port
each
have
LEDs
that
indicate
the
port's
status
and
activity.
See
Table
8
.
16