Disk Cleanup (compress OS drive) problem

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  1. Posts : 29
    10 Home
       #1

    Disk Cleanup (compress OS drive) problem


    Hi guys and gurus. Been giving my self yet another headache :/ Ran disk cleanup this evening, something I don't do as often as I should and discovered the 'compress OS drive' issue. Only as per usual only after it was too late. Selected to delete this thinking it was some stupid nonsense dragged in from the web. I've now discovered that it's actually compressed the drive. So I've unchecked that etc. Manually uncompressed the folders within (I don't need compression, not exactly short on space here) but some remain with the annoying blue arrows. When I check these folders are not marked as compressed so I can't uncompress them.

    Does anyone know how to get around this? I've been doing my due googling and all I can really find is people complaining about this but no solution other than that which I've already tried.

    Also, when I create a new folder on the desktop it's showing with the annoying blue compressed arrows, investigation shows that new folders are compressed. I can uncompress them, but how can I prevent new folders being compressed? I don't really want to have to manually do this every time I create a new folder :/

    As always, eternally grateful for any help you guys can offer.
      My Computer


  2. Posts : 68,954
    64-bit Windows 11 Pro for Workstations
       #2

    Hello,

    You could use an option in the tutorial below to uncompress the Windows 10 OS to see if that may help.

    Compress or Uncompress Windows 10 with Compact OS | Tutorials
      My Computers


  3. Posts : 22
    Win 10 Pro 1803
       #3

    I have exactly the same problem (and the suggestion made by @Brink is a dead end.
    I have found out that when I clean install WIndows 10 1803, there is no such space wasted by "Compressed OS-Drive", but after the normal round of updates, first of all with 1083 update packages (pluss a lot of other stuff that MS is pushing out automatically), then when everything finally calms down and the computer finally asks for a restart - I checked again - and viola, the "Compressed OS-Drive" shows up again with nearly 5Gb of disk space wasted. And there is no way to clean it out.
    I tried issuing this command from an elevated command prompt prior to connecting to internet (just to make sure no update could get in ahead of me):
    c:/compact /compactOS:never
    But to no avail. The updates still waste nearly 5GB compressing the OD-Drive.
    I have several other PC's which has since many moth been running 1809, and none of them have this problem. It only happens now (after february) when installing new PC's.
      My Computer


  4. Posts : 18,432
    Windows 11 Pro
       #4

    How is compressing the drive wasting space? A compressed drive will take up less space than a drive that is not compressed.
      My Computer


  5. Posts : 29
    10 Home
    Thread Starter
       #5

    I think what he means is it shows up as used space under disk cleanup, leading one to believe that it's crap that should be deleted when in reality it's an option to compress the drive. It's a very poor idea, compression options shouldn't be included in disk cleanup, especially not in the "here is all the crap on your PC, tick what you want to get rid of" section.

    I ended up painstakingly uncompressing everything manually as simply unticking the compression option in the disk properties doesn't do this. There are still two folders showing as compressed but searching through them reveals nothing. This is an annoying issue with the Feb updates and is bemoaned elsewhere on the web. I'm a pretty experienced user and it caught me out in no time, I just assumed it was some crud or nonsense and opted to delete it. Only of course it does no such thing, it compresses your drive instead.

    To anyone who hasn't seen this annoying new "improvement" to W10 - here it is -
    If you tick that to "free up" 11.7GB what you're actually doing is compressing the drive.
    Attached Thumbnails Attached Thumbnails Disk Cleanup (compress OS drive) problem-os.png  
      My Computer


  6. Posts : 5,048
    Windows 10/11 Pro x64, Various Linux Builds, Networking, Storage, Cybersecurity Specialty.
       #6

    SD60659 said:
    To anyone who hasn't seen this annoying new "improvement" to W10 - here it is - If you tick that to "free up" 11.7GB what you're actually doing is compressing the drive.
    Do not compress your drive, this also applies to an SSD!

    With information being compressed on the fly, you're consuming more of an SSD's available write cycles than if you were writing the files uncompressed.
    This could have negative implications on the drive's endurance.

      My Computer


  7. Posts : 14,046
    Windows 11 Pro X64 22H2 22621.1848
       #7

    Compumind said:
    Do not compress your drive, this also applies to an SSD!

    With information being compressed on the fly, you're consuming more of an SSD's available write cycles than if you were writing the files uncompressed.
    This could have negative implications on the drive's endurance.

    I don't see that. The compression occurs in RAM as does the decompression. The file is already compressed when written to the drive, be it a SSD or a HDD so if anything you are saving a bit of wear.

    I don't worry about wearing out my SSD. Everything I've read about newer drives says they have a longer life expectancy than normal HDDs. Currently had almost 17TB written to it with no degradation at all. Samsung Magician says all is well.
      My Computers


  8. Posts : 5,048
    Windows 10/11 Pro x64, Various Linux Builds, Networking, Storage, Cybersecurity Specialty.
       #8

    Ztruker said:
    I don't see that. The compression occurs in RAM as does the decompression. The file is already compressed when written to the drive, be it a SSD or a HDD so if anything you are saving a bit of wear.

    I don't worry about wearing out my SSD. Everything I've read about newer drives says they have a longer life expectancy than normal HDDs. Currently had almost 17TB written to it with no degradation at all. Samsung Magician says all is well.
    Most newer SSD's (Samsung is one of them, with over-provisioning) handle it better than others.
    The less expensive and older ones don't fare well with compression.

    Storage is so cheap now...
      My Computer


  9. Posts : 18,432
    Windows 11 Pro
       #9

    Compumind said:
    Most newer SSD's (Samsung is one of them, with over-provisioning) handle it better than others.
    The less expensive and older ones don't fare well with compression.

    Storage is so cheap now...
    I have to agree with @Ztruker. Compressed v. uncompressed has nothing to do with the SSD. Compression/decompression happens in RAM. By the time it gets to the SSD all it is is just plain data being written to/read from the SSD. When you first select compression, or change from compressed to uncompressed, there will be 1 addition read/write cycle and that's it. When you choose to compress, the files are read once, compressed in memory and written once. After that 1 extra cycle to initially compress the data, it is no longer any concern to the SSD because after the initial compression operation, data is read/written to the SSD exactly the same as before, there is just slightly less data being read from and written to the SSD because it is compressed.
      My Computer


  10. Posts : 5,048
    Windows 10/11 Pro x64, Various Linux Builds, Networking, Storage, Cybersecurity Specialty.
       #10

    NavyLCDR said:
    I have to agree with @Ztruker. Compressed v. uncompressed has nothing to do with the SSD. Compression/decompression happens in RAM. By the time it gets to the SSD all it is is just plain data being written to/read from the SSD. When you first select compression, or change from compressed to uncompressed, there will be 1 addition read/write cycle and that's it. When you choose to compress, the files are read once, compressed in memory and written once. After that 1 extra cycle to initially compress the data, it is no longer any concern to the SSD because after the initial compression operation, data is read/written to the SSD exactly the same as before, there is just slightly less data being read from and written to the SSD because it is compressed.
    OK. I agree for the newer generation of SSD's. I still feel strongly that the older ones do not handle the cycles well, IMO.
    On those drives, it is best to compress individual files rather than the whole drive.
      My Computer


 

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