Describes how Cisco NCS 1014 recovers after chassis SSD replacement in operational and shutdown nodes, including backup, software, RPM, and configuration behavior.
The chassis SSD (NCS1K14-SSD) in Cisco NCS 1014 is a hot-swappable module, meaning you can replace it without shutting down the system.
When you remove the chassis SSD while the controller is in operation, the system raises the Disaster Recovery Unavailable alarm. This alarm clears automatically after you install the new chassis SSD.
Summary
These scenarios describe how the node recovers after a chassis SSD replacement.
The key components involved in the process are:
-
Controller SSD: Maintains the system’s software, RPMs, and configuration data critical for node operation.
-
Replacement chassis SSD: The new SSD installed in the chassis, which could have identical, different, or blank software, RPM, and configuration content.
Workflow
These stages describe how nodes recover after chassis SSD replacement.
- If the chassis SSD is replaced while the node is up and running, the way the node recovers depends on what is present on the replacement chassis SSD
Table 1. Replacing a chassis SSD in an operational node When you replace the chassis SSD with...
Then the system loads only...
And then the new chassis SSD takes a backup of...
another that has the same software and RPMs as the controller SSD
the configuration from the controller SSD
the system configuration from the controller SSD.
another that has the different software and RPMs from the controller SSD
the software, RPMs, and the configuration from the controller SSD
all the contents from the controller SSD.
another received from Cisco manufacturing as a spare or through a return material authorization (RMA) process, which comes with a blank configuration
the software, RPMs, and the configuration from the controller SSD, after inserting this SSD to this system
all controller SSD contents.
- If the chassis SSD is replaced in a node that is powered down, recovery occurs as follows after the node boots:
Table 2. Replacing a chassis SSD in a shutdown node When you replace the chassis SSD with...
Then upon powering on...
And then the system...
another that has software and RPMs different from the contents of the controller SSD
the system triggers the disaster recovery workflow
installs the software, RPMs, and configurations from the chassis SSD.
Result
Once the replacement SSD is installed, the node automatically synchronizes and restores configuration and software as needed to ensure proper operation. If contents differ, the system recovers by copying all essential files. The system clears any recovery alarms after restoration is complete.