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The Meaning of "[sdx] Write Cache: Disabled, Read Cache: Disabled, Doesn't Support DPO Or FUA" (Doc ID 2398553.1)

Last updated on MAY 13, 2020

Applies to:

Oracle Cloud Infrastructure - Version N/A and later
Linux OS - Version Oracle Linux 5.0 and later
Linux x86-64

Goal

To understand the meaning of the following messages and their impact.

>>/var/log/messages

May 4 23:10:34 <HOST> kernel: sd 0:0:0:11: [sdx] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA
May 4 23:10:34 <HOST> kernel: sd 0:0:0:9: [sdy] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA
May 4 23:10:34 <HOST> kernel: sd 0:0:0:10: [sdz] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA

 


 

Solution

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