Re: Fedora F41 Hard Disk Performance

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> On 21 Nov 2024, at 13:57, John Mellor <john.mellor@xxxxxxxxx> wrote:
> 
> In the Disks app, select the disk, go to the 3 dots on the top right, select write cache and select disable.  I'm unsure, but you might need to reboot as well.  You can also do this in the CLI, but its been years since I have had to do that.

This should not be required. The OS will send a command to the disk to write through its cache when the OS needs this for data integrity reasons.

In the bad old days disk manufacturers used write cache tricks to win bebchmarks.
But Microsoft added tests to Windows that detected the tricks and refused to use the drives. They did this as the disk failures were being blamed falsely on Windows bugs.
Because of this, and other changes, disks became well behaved around caching.

Barry


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