I have a WD blue drive and it is extremely slow with write caching on turning it off in windows fixed the issue but I cannot find a way to disable write caching on manjaro.
Help is appreciated 
Why and how would a drive “get faster” by turning off that feature?
post info on the drive, on the system
inxi …
What is the perceived problem?
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Hace you tried mounting the drive in /etc/fstab with the “sync” option?
wouldn’t that be like issuing “sync” very often?
to force writing data to disk
effectively increasing writes and therefore decreasing the life-cycle?
That is what I’d think, what is my intuition, based upon man mount.
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More or less. This is the same as adding a sync order each time the computer needs writing some data in the disk and each writing order is performed once the previous order has finished. In a HDD means I/O is muuuuch slower, but i haven’t tested it in a SSD.
You might also look at TRIM settings for your NVMe.
Some useful links for research:
- SSD Trim on Archlinux
- Install and Configure TRIM in Linux
- Should I Use TRIM?
- Solid state drive
- Check if TRIM Is Enabled for Your SSD
Cheers.
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Also be sure you have installed the latest firmware available for your drive:
Some WD blue drives had reliability problems solved with new firmwares.
Assuming updates is available using https://www.fwupd.org/
The following may help - no responsiblity or warranty assumed
sudo pacman -Syu fwupd
fwupdmgr refresh
fwupdmgr get-updates
fwupdmgr update
You probably want to include fwupdmgr refresh in there before the update.
It refreshes the metadata from the server.
get-updates gets the list of updates for connected hardware.
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