Windows 10: New SSD - Clean Install - 3 (???) Partitions Created!

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  1. Posts : 14
    Windows 7 & Windows 10
       25 Feb 2016 #1

    New SSD - Clean Install - 3 (???) Partitions Created!


    Normally I Partition my drives myself using Gparted.
    With a Fresh out of the box (Not even formatted) I wanted to see what Win10 would do with the drive.

    It created 3 partitions (Which surprised me).
    I expected an EFI partition, and the OS partition, but I didn't expect a 450 MB "Recovery Partition" to be created at the very beginning of the drive.

    Click image for larger version. 

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    This is a Zenbook (so a UEFI system) UX303UB, 12 GB Ram, i76500U Processor, & an nVidia 940M (with Optimus)

    What exactly does Windows 'DO' with this "Recovery" partition, and IF I had partitioned the drive myself with only the EFI System Partition, would Windows 10 Really have cared?
    What functionality would I have been out exactly?

    Thanks,

    Greg
    Last edited by TDPsGM; 25 Feb 2016 at 20:58. Reason: editorial clarification
      My ComputerSystem Spec


  2. Posts : 1,178
    Windows 10 Home
       25 Feb 2016 #2

    That contains the Windows Recovery Environment (WinRE). It provides you with advanced boot (try depressing shift key while restarting) options - recovery troubleshooting and others. You may or may not prefer to do without it. Those partitions, along with a 16 MB MSR partition (snugged in between the EFI System Partition and the OS Partition, that you don't see in Disk Management) are part of any standard Win10 clean install to a GPT disk.

    You can see all 4 partitions from an elevated (admin) command prompt using the following commands, in sequence:

    diskpart
    select disk 0
    list par

    ("exit" to leave diskpart)
      My ComputerSystem Spec

  3.    25 Feb 2016 #3

    This WinRE is very useful. It has saved my bacon already a couple of times.
      My ComputerSystem Spec


  4. Posts : 14
    Windows 7 & Windows 10
    Thread Starter
       26 Feb 2016 #4

    Word Man said: View Post
    a 16 MB MSR partition (snugged in between the EFI System Partition and the OS Partition, that you don't see in Disk Management) are part of any standard Win10 clean install to a GPT disk.
    Thanks Word Man.

    IF I had defined my own partitions with Gparted and never created a WinRe partition OR an MSR partition, would windows create them by readjusting the size of the OS partition anyway? (Just wondering how it works)

    What is an MSR partition any how?
    MSR = ???

    Thanks
      My ComputerSystem Spec


  5. Posts : 14
    Windows 7 & Windows 10
    Thread Starter
       26 Feb 2016 #5

    whs said: View Post
    This WinRE is very useful. It has saved my bacon already a couple of times.
    Hi whs,

    could the same thing not be accomplished with a USB recovery drive that we create after the install?

    Thanks.
      My ComputerSystem Spec

  6.    26 Feb 2016 #6

    TDPsGM said: View Post
    Thanks Word Man.

    IF I had defined my own partitions with Gparted and never created a WinRe partition OR an MSR partition, would windows create them by readjusting the size of the OS partition anyway? (Just wondering how it works)

    What is an MSR partition any how?
    MSR = ???

    Thanks
    It would have created another one.

    MSR means microsoft reserved and is a special partition design for future expansion of OS. Just ignore it.
      My ComputerSystem Spec

  7.    26 Feb 2016 #7

    If you delete the 450 mb recovery partition and add the free space to your Windows partition you will gain 0.11% free space on it - just for perspective.

    That being said, for me it's because I like my hard drives partitioned the way I want them partitioned - not always the way Microsoft wants them partitioned so I will delete and move partitions around even though I don't gain free space from it.
      My ComputerSystem Spec

  8.    26 Feb 2016 #8

    TDPsGM said: View Post
    Hi whs,

    could the same thing not be accomplished with a USB recovery drive that we create after the install?

    Thanks.
    RE is a bit more than that.

    Click image for larger version. 

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    Source: Windows Recovery (Repair) Environment (WinRE)
      My ComputerSystem Spec

  9.    26 Feb 2016 #9

    whs said: View Post
    RE is a bit more than that.

    Click image for larger version. 

Name:	2016-02-26_1142.png 
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ID:	66477

    Source: Windows Recovery (Repair) Environment (WinRE)
    and why can't the recovery drive be used for those same functions?
      My ComputerSystem Spec

  10.    26 Feb 2016 #10

    You try all those functions with the recovery drive and let us know whether that worked.
      My ComputerSystem Spec


 
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