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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 port fast_write_option

change port fast_write_option


The change port fast_write_option command is used to modify the fast write properties of a Fibre Channel port.


change port fast_write_option fc_port_id=? burst_len=?






Port ID.

To obtain the value, run "show port general".


Fast write I/O size.

The value can be "4096Bytes", "8192Bytes", "16384Bytes", "32768Bytes", or "73728Bytes", where:

  • "4096Bytes": 4096 bytes.
  • "8192Bytes": 8192 bytes.
  • "16384Bytes": 16,384 bytes.
  • "32768Bytes": 32,768 bytes.
  • "73728Bytes": 73,728 bytes.


Developer view

Usage Guidelines

Before performing this operation, ensure that the services on the port have been stopped.


Set the fast write I/O size of the Fibre Channel port whose ID is CTE0.A3.P0 to 8192 bytes. The port ID and command output vary with product models.

developer:/>change port fast_write_option fc_port_id=CTE0.A3.P0 burst_len=8192Bytes 
DANGER: You are about to change the fast write I/O size of the service port. If the port to be modified has host services, this operation will cause I/O errors on the host services. If the attributes of the Fibre Channel front-end port do not match those of the peer Fibre Channel port, this operation will interrupt the connection between the host and storage system. 
Suggestion: Before performing this operation, ensure that no host service is running on the port. 
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: 2019-07-11

Document ID: EDOC1000181602

Views: 650532

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