Enable or Disable Disk Write Caching in Windows 10  

Hello SHawn
I need your help. I am unable to remove safely my external hard disk. I tried few help forums and i did this
i have changed the settings==> policies>>i changed from quick removal to better performance.
i restarted
Now i went to change it back, bit it says windows cannot make this change .
Now i am afraid i will lose all data on my hard disk

Is there any way to increase the write caching time? I suspect that there's registry setting somewhere to do that.

I was able to reduce the boot time for a Windows 10 laptop PC with a slow HDD from 3 minutes to 30 seconds using a 3rd party software utility called Primocache to enable write caching and extending the cache flush time to 60 seconds, but I'm wondering if it's possible to do that natively in Windows....

tweakradje said:

I needed this option and wrote a little script to do it for all harddisks in the system. Maybe useful for someone?

Code:

For /f "Delims=" %%k in ('Reg.exe Query hklm\SYSTEM\CurrentControlSet\Enum /f "Disk" /k /s^|Findstr "Parameters\Disk"') do (
    Reg.exe add "%%k" /v UserWriteCacheSetting /t reg_dword /d 1 /f  
    Reg.exe add "%%k" /v CacheIsPowerProtected /t reg_dword /d 1 /f
)

EDIT mar 2021

Code:

For /f "Delims=" %%k in ('Reg.exe Query hklm\SYSTEM\CurrentControlSet\Enum /f "{4d36e967-e325-11ce-bfc1-08002be10318}" /d /s^|Find "HKEY"') do (
  Reg.exe add "%%k\Device Parameters\Disk" /v UserWriteCacheSetting /t reg_dword /d 1 /f
  Reg.exe add "%%k\Device Parameters\Disk" /v CacheIsPowerProtected /t reg_dword /d 1 /f
)

I use Win10 USB, but it is not switchable. Can it be activated with this script? I would like to activate only the main disk.

If you cannot do it by windows device manager for this USB disk (option greyed out) changing the registry will not make any difference I guess.

Brian Steele said:

Is there any way to increase the write caching time? I suspect that there's registry setting somewhere to do that.

I was able to reduce the boot time for a Windows 10 laptop PC with a slow HDD from 3 minutes to 30 seconds using a 3rd party software utility called Primocache to enable write caching and extending the cache flush time to 60 seconds, but I'm wondering if it's possible to do that natively in Windows....

A bit late to the party, but might:

How to increase cache memory in Windows: 10, 8, 7

(Set HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\Session Manager\Memory Management\LargeSystemCache 32-bit DWord value to 1 then reboot)

help?