Dell Equallogic PS6010 Storage Arrays - Hardware Owners Manual - Page 32

Maintaining Control Module Firmware, Network connection failover., Control module failover., Caution

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PS6010 Hardware Maintenance Maintaining Control Modules storing recently-used data. For redundancy, the cache on the secondary control module mirrors the data that is stored in the cache on the active control module. The active control module can use a network interface only if there is a cable connected to the port on the active control module. Therefore, you should connect a cable to a network interface port on each control module to make sure that both control modules can access an interface. A PS series array provides two types of network failure protection: • Network connection failover. If multiple network interfaces are configured and one network interface fails, iSCSI initiators that were connected to the failed interface can reconnect to the group IP address and be redirected to a functioning interface. For example, in a single control module array, if Ethernet 0 and Ethernet 1 are connected to a network, and Ethernet 0 fails, initiators that were connected to Ethernet 0 can be redirected to Ethernet 1. • Control module failover. In a dual control module array, if the active control module fails, the secondary automatically takes over and becomes active. If a cable is connected to the port on the newly active control module, network I/O can continue through that interface. Control module failover is transparent to applications, but iSCSI initiators must reconnect to the group IP address. Maintaining Control Module Firmware A Type 10 control module has a microSD card running the array firmware. You should run the latest firmware version to take advantage of new product features and enhancements. Caution: In a dual control module array, both control modules must be running the same firmware version; otherwise, only one control module will be functional. When you use the update command procedure, both control modules are updated to the same firmware version. Group members should run the same firmware version; otherwise, only the functionality common to all versions will be available in the group. See the PS Series Release Notes for information about mixed-firmware groups. If you are adding a second control module, upgrading a control module, or replacing a failed microSD card, contact your PS Series support provider for a replacement. Inform your provider of the current PS Series firmware version on 3-4

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PS6010 Hardware Maintenance
Maintaining Control Modules
3–4
storing recently-used data. For redundancy, the cache on the secondary control
module mirrors the data that is stored in the cache on the active control module.
The active control module can use a network interface
only if there is a cable
connected to the port on the active control module. Therefore, you should connect
a cable to a network interface port on each control module to make sure that both
control modules can access an interface.
A PS series array provides two types of network failure protection:
•
Network connection failover.
If multiple network interfaces are configured
and one network interface fails, iSCSI initiators that were connected to the
failed interface can reconnect to the group IP address and be redirected to a
functioning interface. For example, in a single control module array, if
Ethernet 0 and Ethernet 1 are connected to a network, and Ethernet 0 fails,
initiators that were connected to Ethernet 0 can be redirected to Ethernet 1.
•
Control module failover.
In a dual control module array, if the active control
module fails, the secondary automatically takes over and becomes active. If a
cable is connected to the port on the newly active control module, network I/O
can continue through that interface. Control module failover is transparent to
applications, but iSCSI initiators must reconnect to the group IP address.
Maintaining Control Module Firmware
A Type 10 control module has a microSD card running the array firmware. You
should run the latest firmware version to take advantage of new product features
and enhancements.
Caution:
In a dual control module array, both control modules must be running
the same firmware version; otherwise, only one control module will
be functional. When you use the update command procedure, both
control modules are updated to the same firmware version.
Group members should run the same firmware version; otherwise, only the
functionality common to all versions will be available in the group. See the
PS Series
Release Notes
for information about mixed-firmware groups.
If you are adding a second control module, upgrading a control module, or
replacing a failed microSD card, contact your PS Series support provider for a
replacement. Inform your provider of the current PS Series firmware version on