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Advanced O&M Command Reference

OceanStor 2800 V5 V500R007

This document is applicable to OceanStor 2800 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 sdparam

change sdparam


The change sdparam command is used to modify some configurations of disks or LUNs, including the merging status, queue depth, and disk cache status.


change sdparam device_type=? [ merge=? | qdepth=? | cache=? ]





device_type=? Device model.

The value can be LUN, SAS, SATA, SSD, NearLine_SAS, or NVMe_SSD.

merge=? Status of I/O merging.

The value can be on or off, where:

  • on: The I/O merging function is enabled.
  • off: The I/O merging function is disabled.
qdepth=? Queue depth of disks.

The value is an integer ranging from 1 to 64.

cache=? Status of disk write cache.

The value can be on or off, where:

  • on: The disk write cache function is enabled.
  • off: The disk write cache function is disabled.


Developer view

Usage Guidelines



Change the cache status of LUNs to on.

developer:/>change sdparam device_type=LUN cache=on
Command executed successfully

System Response


Updated: 2020-01-17

Document ID: EDOC1000181575

Views: 720048

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