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Advanced O&M Command Reference

OceanStor 18000 and 18000F V5 Series V500R007

This document is applicable to OceanStor 18500 V5, 18800 V5, 18500F V5, and 18800F V5. Based on the CLI, this document describes how to use various commands classified by functionsand how to set the CLI and manage the storage system through these commands.

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change controllers_expansion cancel

change controllers_expansion cancel


The change controllers_expansion cancel command is used to roll back the configuration of a cluster when controllers to be expanded fail to be added to the cluster.


change controllers_expansion cancel controller_total=?





controller_total=? Total number of controllers in the cluster.

The value is an integer between 2 and 14.


Developer view, Engineer view

Usage Guidelines

After the controller fails to be expanded, before executing the rollback command, disconnect the network link between the original cluster of the expanded controllers and the cluster of controllers to be expanded. Details are as follows:

Devices in PCIe Scale-Out network:

  • Disconnect the PCIe link network and management link network of controllers to be expanded and live network, and run the rollback command on a controller of the original cluster.
  • For OceanStor 18000 V3/V5 devices, when expanding 2 controllers to 4 controllers, 6 controllers to 8 controllers, 10 controllers to 12 controllers, or 14 controllers to 16 controllers, remove the controller to be expanded first and run the rollback command.


To reset the number of controllers to 2 after cluster expansion failed, run the following command:

engineer:/>change controllers_expansion cancel controller_total=2
DANGER: You are going to execute the operation of cancelling bay.This operation will cause the service discontinuous and the data lost.
Suggestion: Before you perform this operation, ensure that you have input the correct parameter and no service is running on the controllers that you want to cancel.
Have you read danger alert message carefully?(y/n)y

Are you sure you really want to perform the operation?(y/n)y
Command executed successfully.

System Response


Updated: 2020-01-17

Document ID: EDOC1000181602

Views: 760097

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