Dell VNX: How to Enable or Disable Write Cache on LUN Level (User Correctable)
Summary: How to Enable or Disable Write Cache on LUN Level.
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Instructions
In Unisphere navigate to:
Storage > Storage Configuration > Storage Pools > RAID Groups tab > click "RAID GROUP name" > LUNs > Right Click "LUN Name" > Properties > Cache tab > Check/Uncheck "Use SP Write Cache"
Note: Performance will be impacted on the LUN that write cache has been disabled.
****Write Cache can ONLY be disabled for Traditional RAID Group LUNs, NOT Pool LUNs****
Additional Information
Page 19 of the EMC VNX VIRTUAL PROVISIONING white paper states the below:
Pools and subsequently pool LUNs are covered with default cache options that are not tunable like traditional LUNs. The only cache option for a pool is to enable or disable FAST Cache when available.
Affected Products
VNX/VNXeProducts
VNX1 Series, VNX2 Series, VNX/VNXeArticle Properties
Article Number: 000022726
Article Type: How To
Last Modified: 17 Mar 2025
Version: 6
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