Disable Disk Write Caching on SSD in Windows 10

  1. Posts : 2
    win 10 64 pro

    Disable Disk Write Caching on SSD in Windows 10

    Hi, I read the tutorial on how to disable write caching. But, when I shut down and later turn on my PC and check the policy tab for my Samsung SSD C: drive the caching box is checked again. Also I turned off "RAPID" on the SSD. Please let me know what I'm doing wrong.
    Here's some info
    OS Version: Microsoft Windows 10 Pro, 64 bit
    Processor: Intel(R) Core(TM) i7-8700K CPU @ 3.70GHz, Intel64 Family 6 Model 158 Stepping 10
    Processor Count: 12
    RAM: 32695 Mb
    Graphics Card: NVIDIA GeForce GTX 1060 6GB, -1 Mb
    Hard Drives: C: 837 GB (383 GB Free); E: 1863 GB (430 GB Free); F: 931 GB (487 GB Free); H: 0 GB (0 GB Free);
    Antivirus: Windows Defender, Disabled
      My Computer

  2. Clintlgm's Avatar
    Posts : 1,086
    Win 10 pro Upgraded from 8.1

    Well since your not running a RAID 5 or any other safe RAID you OS needs the write caching to prevent data loss. Disable write caching would normally only be for external hard drives or like I said in a RAID situation for hot swapping in a replacement drive for a failed one. So I think windows is just turning it back on to save its self?
      My Computers

  3. Posts : 2
    win 10 64 pro
    Thread Starter

    Wow. Thanks so much.
      My Computer

  4. Posts : 1,300

    Not true.

    Write caching is there to defer disk writes until later.

    Why write blocks to disk if a program might change that block, forcing it to be written to disk yet again?
    Why write blocks to disk now if the filesystem is busy with other tasks?
    Just cache the blocks.
    And keep them cached so that if they're needed again they can be read from cache rather than from disk.

    Caching reduces the overhead. But it makes the system vulnerable to data loss if power is abruptly lost before the cached blocks can be written to disk.

    The risk is small, so we almost always keep disk caching turned on.
      My Computer


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