Maintaining Control Module Firmware - Dell EqualLogic PS4000 Hardware Maintenance

PS4000 Hardware Maintenance
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 8 control module has a compact flash card, and a Type 9 control module
has a micro SD 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 compact flash or micro SD card, make sure to order the correct
PS Series firmware version. If you are replacing a failed control module, remove
the compact flash or micro SD card from the failed control module and install it in
the replacement control module. This will make sure that you keep the correct
firmware.
To display the firmware version running on an array, examine the GUI Member
Controllers window or use the CLI
command. If the firmware on a micro SD card does not match the firmware
running on an array, do not install it. Instead, contact your array support provider.
3–4
member select show controllers
Maintaining Control Modules