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  1.    13 Mar 2017 #11
    Join Date : Oct 2014
    Arnold, MD
    Posts : 28,988
    Triple boot - Win 10 Pro, Win 10 Pro Insider (2) - (and a sprinkling of VMs)

    Quote Originally Posted by lx07 View Post
    If your WinRE partition isn't big enough then it creates new partitions when your upgrade. It isn't clear which is the currently registered partition - it could be 5 or 7 or even 1.

    In addition to above show a print of reagentc /info from elevated command prompt and it will tell you which it is using.
    Code:
    Microsoft Windows [Version 10.0.14393]
    (c) 2016 Microsoft Corporation. All rights reserved.
    
    C:\Windows\system32>reagentc /info
    Windows Recovery Environment (Windows RE) and system reset configuration
    Information:
    
        Windows RE status:         Enabled
        Windows RE location:       \\?\GLOBALROOT\device\harddisk0\partition1\Recovery\WindowsRE
        Boot Configuration Data (BCD) identifier: 60a76a2a-e726-10e6-9763-d4823e10b645
        Recovery image location:
        Recovery image index:      0
        Custom image location:
        Custom image index:        0
    
    REAGENTC.EXE: Operation Successful.
    
    
    C:\Windows\system32>
    That's a quick way of finding it. In addition, MiniTool will let you explore un-lettered partitions, like the other small ones, and check the dates on the files. Helps to determine what's in there and what can be safely deleted.
      My ComputersSystem Spec
  2.    15 Mar 2017 #12
    Join Date : Mar 2017
    Posts : 4
    Windows 10
    Thread Starter



    Thank you all guys for your advices. Maybe I finally understood what happened to my drive: partition #1, partition #2 and partition #3 as described in this link Numerous recovery partitions after a few formats and installations

    Thanks to @Avocado
    Partition 1 - Recovery (WINRE) - 650MB

    • Windows RE bootable (for Recovery Mode)
    • Used when booting into Windows Recovery (Win RE) environment

    Partition 2 - System (LBA) - 260MB

    • System UEFI bootable (EFI/Windows boot menu)
    • UEFI boots this partition, it contains Windows NTLDR, HAL, Boot.txt, and some drivers (Windows will not boot without this)

    Partition 3 - Reserved (MSR) - 128MB

    • Reserved Microsoft partition for GPT-based disks
    • Must exist and must be 128MB, used by Windows when moving/changing partitions through Disk Manager

    Partition #7 was the recovery partition which probably have to exist at the beginnig after WINDOWS partition (as described in this link Too many Recovery Partitions???), 842 MB UNALLOCATED SPACE and Partition #5 were respectively created when I upgraded first to WINDOWS 10 and then to WINDOWS 10 anniversary edition (probably because there is not enough free space available on the RECOVERY partition).

    In short I will provide MiniTool and reagentc /info data, to target active and actually used partitions.
      My ComputerSystem Spec
  3.    15 Mar 2017 #13
    Join Date : Oct 2014
    Arnold, MD
    Posts : 28,988
    Triple boot - Win 10 Pro, Win 10 Pro Insider (2) - (and a sprinkling of VMs)

    Quote Originally Posted by tsam View Post


    Thank you all guys for your advices. Maybe I finally understood what happened to my drive: partition #1, partition #2 and partition #3 as described in this link Numerous recovery partitions after a few formats and installations




    Partition #7 was the recovery partition which probably have to exist at the beginnig after WINDOWS partition (as described in this link Too many Recovery Partitions???), 842 MB UNALLOCATED SPACE and Partition #5 were respectively created when I upgraded first to WINDOWS 10 and then to WINDOWS 10 anniversary edition (probably because there is not enough free space available on the RECOVERY partition).

    In short I will provide MiniTool and reagentc /info data, to target active and actually used partitions.
    Good, @tsam! You're getting there!
      My ComputersSystem Spec
  4.    16 Mar 2017 #14
    Join Date : Mar 2017
    Posts : 4
    Windows 10
    Thread Starter

    Here are the reagentc log:
    Code:
    Microsoft Windows [Version 10.0.14393]
    (c) 2016 Microsoft Corporation. All rights reserved.
    
    C:\Windows\system32>reagentc /info
    Windows Recovery Environment (Windows RE) and system reset configuration
    Information:
    
        Windows RE status:    Enabled
        Windows RE location:    \\?\GLOBALROOT\device\harddisk0\partition5\Recovery\WindowsRE
        Boot Configuration Data (BCD) identifier:    --------------------------------------------------
        Recovery image location:    \\?\GLOBALROOT\device\harddisk0\partition8\preload
        Recovery image index:    4
        Custom image location:
        Custom image index:    0
    
    
    REAGENTC.EXE: Operation Successful.
    
    
    C:\Windows\system32>
    According to reagentc log Partition #5 is the active recovery partition (last RE partition created after windows 10 anniversary update next to OS partition), Partition #8 instead is the HP recovery image image.
      My ComputerSystem Spec
  5.    16 Mar 2017 #15
    Join Date : Dec 2015
    Posts : 5,936
    Windows10

    Quote Originally Posted by dalchina View Post
    Please clarify if you're using legacy BIOS or UEFI and whether your disk is formatted as GPT or MBR.
    By definition it must be UEFI as more than 4 primary partitions.
      My ComputerSystem Spec
  6.    16 Mar 2017 #16
    Join Date : Dec 2015
    Posts : 5,936
    Windows10

    Quote Originally Posted by tsam View Post
    Recently I noticed that after upgrading to the latest version of Windows 10 anniversary on my HP notebook, the partition table on my disk has been changed (including the creation of 842 MB of unallocated space, and the resize of the partition containing windows 10 from 200 GB to 199.09 GB). I attached the screenshot of Macrium reflect.

    Attachment 124933

    The only partitions that I'd like to keep are the following:

    • WINDOWS C: os partition;
    • HP Data F: created for storing data;
    • RECOVERY D: HP recovery partition.

    Now I'd like to know among the remaining partitions what are those can I delete and what are instead the partition should I keep to prevent issues allowing windows 10 works properly ?
    I'd rather avoid to run a clean windows 10 installation.


    Actually, you only need to keep two partitions as a minimum i.e. the FAT32 partition (do not under any circumstances delete this) and the C drive, but also you want to keep the F: partition for sure in your case.

    Frankly, keeping recovery partitions on Windows 10 does not really benefit you much as you can simply use an installation usb drive to achieve same end. I actually delete them all to save space.

    The 3rd partition of 128 MB can normally be deleted (actually in a fresh w10 install it is now only 16MB) but some say to keep it for future needs. I delete it as you can recreate it anyway. This partition is a bit of a PITA as even 3rd party tools will not move this one, so you can end up with a fair bit of wasted space to left of it.
      My ComputerSystem Spec
  7.    16 Mar 2017 #17
    Join Date : Jul 2015
    Posts : 3,722
    10 Pro

    Click image for larger version. 

Name:	Capture.PNG 
Views:	19 
Size:	12.2 KB 
ID:	125411

    Source: https://msdn.microsoft.com/en-us/win...ive-partitions

    You can delete the ones you don't want and shuffle them into the correct order using MiniTool Partition Wizard and then re-register WinRE.
      My ComputerSystem Spec

 
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