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– Supports setting an optional enclosure Maximum Power Limit, which either alerts or takes actions, such
as throttling server modules and/or preventing the power up of new server modules to keep the
enclosure under the defined maximum power limit.
– Monitors and automatically controls cooling fans based on actual ambient and internal temperature
measurements.
– Provides comprehensive enclosure inventory and status or error reporting.
• Centralized configuration of the following:
– The enclosure's shared storage settings.
– Mapping of add-in PCIe cards to the server modules.
– The enclosure’s network and security settings.
– Power redundancy and power ceiling settings.
– I/O module and iDRAC network settings.
– First boot device on the server modules.
– Checks I/O fabric consistency for the I/O module, PCIe slots, storage subsystem, and server modules
and disables components if necessary to protect the system hardware.
– User access security.
CMC Fail-Safe Mode
The VRTX enclosure enables the fail-safe mode to protect the server modules and the I/O module from failures. The fail-
safe mode is enabled when no CMC is in control of the chassis. During the CMC failover period or during a single CMC
management loss:
• server modules cannot be accessed remotely
• you cannot turn on a server module(s)
• the cooling fans continue to operate at the same speed
The following are some of the conditions that can result in CMC management loss:
Condition Description
CMC removal Chassis management resumes after replacing CMC, or after failover to standby CMC.
CMC network cable
removal or network
connection loss
Chassis management resumes after the chassis fails over to the standby CMC. Network
failover is only enabled in redundant CMC mode.
CMC reset Chassis management resumes after the CMC reboots or chassis fails over to the standby CMC.
CMC failover
command issued
Chassis management resumes after the chassis fails over to the standby CMC.
CMC firmware update Chassis management resumes after the CMC reboots or chassis fails over to the standby CMC.
It is recommended that you update the standby CMC first so that there is only one failover
event. For more information on updating the CMC firmware, see the
Dell Chassis Management
Controller for Dell PowerEdge VRTX User’s Guide
at dell.com/esmmanuals.
CMC error detection
and correction
Chassis management resumes after the CMC resets or chassis fails over to the standby CMC.
NOTE
: You can configure the enclosure with a single CMC or with redundant CMCs. In redundant CMC
configurations, if the primary CMC loses communication with the enclosure or the management network, the
standby CMC takes over chassis management.
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