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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 functions and how to set the CLI and manage the storage system through these commands. The document that you browse online matches the latest C version of the product. Click Download to download documents of other C versions.
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change system force_write_back

change system force_write_back

Function

The change system force_write_back command is used to change the forcible write back state of the system.

Format

change system force_write_back switch=?

Parameters

Parameter

Description

Value

switch=?

Forcible write back state.

The value can be "no_force_writeback", "user_data_force_writeback", "all_data_force_writeback", or "all_data_force_writethrough", where:

  • "no_force_writeback": no forcible write back.
  • "user_data_force_writeback": forcible write back for user data.
  • "all_data_force_writeback": forcible write back for all data.
  • "all_data_force_writethrough": forcible write through for all data.

Views

Developer view

Usage Guidelines

None

Example

  • Change the forcible write back state to "user_data_fore_writeback".
    developer:/>change system force_write_back switch=user_data_force_writeback 
    DANGER: You are about to set the forcible write back state. This operation caches data in the memory if the system cannot protect data in the memory. 
    Suggestion: If a fault causes data risks in the memory, rectify the fault as quickly as possible. 
    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. 
  • Change the forcible write back state to "all_data_force_writeback".
    developer:/>change system force_write_back switch=all_data_force_writeback 
    DANGER: You are about to set the forcible write back state. This operation caches data in the memory if the system cannot protect data in the memory. 
    Suggestion: If a fault causes data risks in the memory, rectify the fault as quickly as possible. 
    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. 
  • Change the forcible write back state to "no_force_writeback".
    developer:/>change system force_write_back switch=no_force_writeback 
    Command executed successfully.
  • Change the forcible write back state to "all_data_force_writethrough".
    developer:/>change system force_write_back switch=all_data_force_writethrough 
    DANGER: You are about to set the global write through status for the system. This operation may affect system performance. 
    Suggestion: Before performing this operation, ensure that the operation is necessary. You are advised to keep the system default status. 
    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

None

Translation
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Updated: 2019-07-11

Document ID: EDOC1000181602

Views: 627848

Downloads: 55

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