Help with active primary drives.

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  1.    #1

    Help with active primary drives.


    Can someone tell me if this looks normal? Just installed Win 10 and was about to rearrange some drive letters and thought it looked odd with so many drives labeled active and primary.

    Click image for larger version. 

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      My ComputerSystem Spec

  2. Bree's Avatar
    Posts : 11,983
    10 Home x64 (1903) (10 Pro on 2nd pc)
       #2

    M0710NM4N said: View Post
    Can someone tell me if this looks normal? Just installed Win 10 and was about to rearrange some drive letters and thought it looked odd with so many drives labeled active and primary.
    Welcome to TenForums @M0710NM4N

    It is not unusual to have more than one active partition, particularly if (as seems to be the case here) you have repurposed one or more drives that originally had an OS installed on them without first wiping all the partitions from them.

    An Active partition means that it is capable of being booted from, but not that it will be booted. Unless you have a multi-boot menu at start up, only one of them will actually be used to boot from. We just don't know which one that is. To find out, open a Command Prompt (Admin) and type the bcdedit command. The 'Windows Boot Manager' {bootmgr} item should tell you which disk/partition it is, 'Windows Boot Loader' {current} should point to your C: drive.

    What does look odd is that you've ended up with the Windows C: drive on disk 1. If the {bootmgr} is on one of the other disks you'll have to be careful not to move or reformat that other disk or you'll not be able to boot.

    Normally we recommend removing all other disks when installing Windows on a multi-disk system, that way you ensure all the partitions required for booting the system are on just the one disk. You can then put the other disks back once Windows is installed.

    It should do no harm leaving the other partitions marked as Active.
      My ComputersSystem Spec

  3.    #3

    Bree said: View Post
    Welcome to TenForums @M0710NM4N

    It is not unusual to have more than one active partition, particularly if (as seems to be the case here) you have repurposed one or more drives that originally had an OS installed on them without first wiping all the partitions from them.

    An Active partition means that it is capable of being booted from, but not that it will be booted. Unless you have a multi-boot menu at start up, only one of them will actually be used to boot from. We just don't know which one that is. To find out, open a Command Prompt (Admin) and type the bcdedit command. The 'Windows Boot Manager' {bootmgr} item should tell you which disk/partition it is, 'Windows Boot Loader' {current} should point to your C: drive.

    What does look odd is that you've ended up with the Windows C: drive on disk 1. If the {bootmgr} is on one of the other disks you'll have to be careful not to move or reformat that other disk or you'll not be able to boot.

    Normally we recommend removing all other disks when installing Windows on a multi-disk system, that way you ensure all the partitions required for booting the system are on just the one disk. You can then put the other disks back once Windows is installed.

    It should do no harm leaving the other partitions marked as Active.
    Appreciate the reply... now I did check with Command Prompt and indeed pointing to C: drive.

    Lets say I wanted to clean this up before moving things around and changing drive letters. What should I do and what software would you recommend? Got a touch of OCD and hadn't given it much thought when reinstalling with regards to disconnecting drives. Have made a mental note. But would like to know that it's all the way it should be before proceeding. Else it will nag me mentally. LOL
      My ComputerSystem Spec

  4. Bree's Avatar
    Posts : 11,983
    10 Home x64 (1903) (10 Pro on 2nd pc)
       #4

    M0710NM4N said: View Post
    Appreciate the reply... now I did check with Command Prompt and indeed pointing to C: drive.

    Lets say I wanted to clean this up before moving things around and changing drive letters. What should I do and what software would you recommend?
    And did it say that you are booting from the active 'System Reserved' partition on your disk 1, the same disk as your Windows 10 C: partition?

    The first thing I would do is check that by temporarily disconnecting all the other drives and making sure you can still boot Windows. If not, you may need to edit the BCD entries to point to the boot partition, particularly if your disk 1 becomes disk 0. @NavyLCDR or others may be able to help with that.

    Then, once you know which drive to leave well alone, MiniTools Partition Manager would be the tool to use on the other drives. There is a free edition.
    https://www.partitionwizard.com/free...n-manager.html
      My ComputersSystem Spec

  5.    #5

    The disk management screen posted in the OP shows the System Reserved partition (the first partition) on Drive 1 as the system partition (what the computer booted from), and it shows the second partition as C: drive, the boot partition, the partition containing the OS that was booted into. Therefore, the system reserved (first partition) on Disk 0 can be safely deleted, and the active flag from the partition on Disk 4 can also be safely removed.

    I recommend MiniTool Partition Wizard Free for that:
    Best Free Partition Manager for Windows | MiniTool Partition Free
      My ComputerSystem Spec


  6. Posts : 26,465
    windows 10 professional version 1607 build 14393.969 64 bit
       #6

    NavyLCDR , Please explain in other words when there are multiple system reserved partitions displayed on disk management that are active how to distinguish between what can and cannot be deleted. For example if there were three or more system reserved partitions.

    What do you look for in diskpart to make the same conclusion?


    M0710NM4N ,

    In addition to the above please open administrative command prompt and copy and paste this whole command:

    Code:
    bcdedit /enum
    bcdedit | find "osdevice"
    reagentc /info
    diskpart
    list disk
    list volume
    select disk 0
    detail disk
    list partition
    select partition 1
    detail partition
    select partition 2
    detail partition
    select partition 3
    detail partition
    select partition 4 
    detail partition
    select disk 1
    detail disk
    list partition
    select partition 1
    detail partition
    select partition 2
    detail partition
    select partition 3
    detail partition
    select partition 4
    detail partition
    select disk 2
    detail disk
    list partition
    select disk 3
    detail disk
    list partition
    select partition 1
    detail partition
    select partition 2
    detail partition
    select disk 4
    detail disk
    list partition
    select partition 1
    detail partition
    exit
    When these have completed > right click on the top bar or title bar of the administrative command prompt box > left click on edit then select all > right click on the top bar again > left click on edit then copy > paste into the thread
      My ComputerSystem Spec


  7. Bree's Avatar
    Posts : 11,983
    10 Home x64 (1903) (10 Pro on 2nd pc)
       #7

    zbook said: View Post
    NavyLCDR , Please explain in other words when there are multiple system reserved partitions displayed on disk management that are active how to distinguish between what can and cannot be deleted.
    I think what @NavyLCDR spotted (and I didn't) is that in post #1's Disk Management screenshot Disk 1's 'System Reserved' partition is described as 'Healthy (System, Active, Primary Partition)' - 'System' indicating that it was the partition that was booted from.
      My ComputersSystem Spec

  8.    #8

    zbook said: View Post
    NavyLCDR , Please explain in other words when there are multiple system reserved partitions displayed on disk management that are active how to distinguish between what can and cannot be deleted. For example if there were three or more system reserved partitions.

    What do you look for in diskpart to make the same conclusion?


    M0710NM4N ,

    In addition to the above please open administrative command prompt and copy and paste this whole command:

    Code:
    bcdedit /enum
    bcdedit | find "osdevice"
    reagentc /info
    diskpart
    list disk
    list volume
    select disk 0
    detail disk
    list partition
    select partition 1
    detail partition
    select partition 2
    detail partition
    select partition 3
    detail partition
    select partition 4 
    detail partition
    select disk 1
    detail disk
    list partition
    select partition 1
    detail partition
    select partition 2
    detail partition
    select partition 3
    detail partition
    select partition 4
    detail partition
    select disk 2
    detail disk
    list partition
    select disk 3
    detail disk
    list partition
    select partition 1
    detail partition
    select partition 2
    detail partition
    select disk 4
    detail disk
    list partition
    select partition 1
    detail partition
    exit
    When these have completed > right click on the top bar or title bar of the administrative command prompt box > left click on edit then select all > right click on the top bar again > left click on edit then copy > paste into the thread
    Code:
    Microsoft Windows [Version 10.0.17134.191]
    (c) 2018 Microsoft Corporation. All rights reserved.
    
    C:\Windows\System32>bcdedit /enum
    
    Windows Boot Manager
    --------------------
    identifier              {bootmgr}
    device                  partition=\Device\HarddiskVolume2
    description             Windows Boot Manager
    locale                  en-US
    inherit                 {globalsettings}
    default                 {current}
    resumeobject            {73de2ee7-08af-11e8-ab8c-001fc664d95f}
    displayorder            {current}
    toolsdisplayorder       {memdiag}
    timeout                 3
    
    Windows Boot Loader
    -------------------
    identifier              {current}
    device                  partition=C:
    path                    \Windows\system32\winload.exe
    description             Windows 10
    locale                  en-US
    inherit                 {bootloadersettings}
    recoverysequence        {73de2ee9-08af-11e8-ab8c-001fc664d95f}
    displaymessageoverride  Recovery
    recoveryenabled         Yes
    allowedinmemorysettings 0x15000075
    osdevice                partition=C:
    systemroot              \Windows
    resumeobject            {73de2ee7-08af-11e8-ab8c-001fc664d95f}
    nx                      OptIn
    bootmenupolicy          Standard
    quietboot               Yes
    bootlog                 Yes
    
    C:\Windows\System32>bcdedit | find "osdevice"
    osdevice                partition=C:
    
    C:\Windows\System32>reagentc /info
    Windows Recovery Environment (Windows RE) and system reset configuration
    Information:
    
        Windows RE status:         Enabled
        Windows RE location:       \\?\GLOBALROOT\device\harddisk1\partition1\Recovery\WindowsRE
        Boot Configuration Data (BCD) identifier: 73de2ee9-08af-11e8-ab8c-001fc664d95f
        Recovery image location:
        Recovery image index:      0
        Custom image location:
        Custom image index:        0
    
    REAGENTC.EXE: Operation Successful.
    
    
    C:\Windows\System32>diskpart
    
    Microsoft DiskPart version 10.0.17134.1
    
    Copyright (C) Microsoft Corporation.
    On computer: M0710NM4N
    
    DISKPART> list disk
    
      Disk ###  Status         Size     Free     Dyn  Gpt
      --------  -------------  -------  -------  ---  ---
      Disk 0    Online          465 GB      0 B
      Disk 1    Online          465 GB      0 B
      Disk 2    Online          465 GB      0 B
      Disk 3    Online          465 GB      0 B
      Disk 4    Online          465 GB  1024 KB
      Disk 5    No Media           0 B      0 B
    
    DISKPART> list volume
    
      Volume ###  Ltr  Label        Fs     Type        Size     Status     Info
      ----------  ---  -----------  -----  ----------  -------  ---------  --------
      Volume 0     E   Storage WD   NTFS   Partition    465 GB  Healthy
      Volume 1         System Rese  NTFS   Partition    500 MB  Healthy    System
      Volume 2     C   Windows 10   NTFS   Partition    465 GB  Healthy    Boot
      Volume 3     D   Music WD     NTFS   Partition    465 GB  Healthy
      Volume 4     G   Storage 2 S  NTFS   Partition    465 GB  Healthy
      Volume 5     F   Extra Stora  NTFS   Partition    465 GB  Healthy
      Volume 6     J                       Removable       0 B  No Media
    
    DISKPART> select disk 0
    
    Disk 0 is now the selected disk.
    
    DISKPART> detail disk
    
    WDC WD5003AZEX-00MK2A0 ATA Device
    Disk ID: 732A5E44
    Type   : ATA
    Status : Online
    Path   : 0
    Target : 0
    LUN ID : 0
    Location Path : ACPI(_SB_)#ACPI(PCI0)#ACPI(SATA)#ACPI(CHN0)#ATA(C00T00L00)
    Current Read-only State : No
    Read-only  : No
    Boot Disk  : No
    Pagefile Disk  : No
    Hibernation File Disk  : No
    Crashdump Disk  : No
    Clustered Disk  : No
    
      Volume ###  Ltr  Label        Fs     Type        Size     Status     Info
      ----------  ---  -----------  -----  ----------  -------  ---------  --------
      Volume 0     E   Storage WD   NTFS   Partition    465 GB  Healthy
    
    DISKPART> list partition
    
      Partition ###  Type              Size     Offset
      -------------  ----------------  -------  -------
      Partition 1    Primary            465 GB  1024 KB
    
    DISKPART> select partition 1
    
    Partition 1 is now the selected partition.
    
    DISKPART> detail partition
    
    Partition 1
    Type  : 07
    Hidden: No
    Active: No
    Offset in Bytes: 1048576
    
      Volume ###  Ltr  Label        Fs     Type        Size     Status     Info
      ----------  ---  -----------  -----  ----------  -------  ---------  --------
    * Volume 0     E   Storage WD   NTFS   Partition    465 GB  Healthy
    
    DISKPART> select partition 2
    
    The specified partition is not valid.
    Please select a valid partition.
    
    There is no partition selected.
    
    DISKPART> detail partition
    
    There is no partition selected.
    Please select a partition and try again.
    
    DISKPART> select partition 3
    
    The specified partition is not valid.
    Please select a valid partition.
    
    There is no partition selected.
    
    DISKPART> detail partition
    
    There is no partition selected.
    Please select a partition and try again.
    
    DISKPART> select partition 4
    
    The specified partition is not valid.
    Please select a valid partition.
    
    There is no partition selected.
    
    DISKPART> detail partition
    
    There is no partition selected.
    Please select a partition and try again.
    
    DISKPART> select disk 1
    
    Disk 1 is now the selected disk.
    
    DISKPART> detail disk
    
    Samsung SSD 850 EVO 500GB ATA Device
    Disk ID: CD76E256
    Type   : ATA
    Status : Online
    Path   : 0
    Target : 1
    LUN ID : 0
    Location Path : ACPI(_SB_)#ACPI(PCI0)#ACPI(SATA)#ACPI(CHN0)#ATA(C00T01L00)
    Current Read-only State : No
    Read-only  : No
    Boot Disk  : Yes
    Pagefile Disk  : Yes
    Hibernation File Disk  : No
    Crashdump Disk  : Yes
    Clustered Disk  : No
    
      Volume ###  Ltr  Label        Fs     Type        Size     Status     Info
      ----------  ---  -----------  -----  ----------  -------  ---------  --------
      Volume 1         System Rese  NTFS   Partition    500 MB  Healthy    System
      Volume 2     C   Windows 10   NTFS   Partition    465 GB  Healthy    Boot
    
    DISKPART> list partition
    
      Partition ###  Type              Size     Offset
      -------------  ----------------  -------  -------
      Partition 1    Primary            500 MB  1024 KB
      Partition 2    Primary            465 GB   501 MB
    
    DISKPART> select partition 1
    
    Partition 1 is now the selected partition.
    
    DISKPART> detail partition
    
    Partition 1
    Type  : 07
    Hidden: No
    Active: Yes
    Offset in Bytes: 1048576
    
      Volume ###  Ltr  Label        Fs     Type        Size     Status     Info
      ----------  ---  -----------  -----  ----------  -------  ---------  --------
    * Volume 1         System Rese  NTFS   Partition    500 MB  Healthy    System
    
    DISKPART> select partition 2
    
    Partition 2 is now the selected partition.
    
    DISKPART> detail partition
    
    Partition 2
    Type  : 07
    Hidden: No
    Active: No
    Offset in Bytes: 525336576
    
      Volume ###  Ltr  Label        Fs     Type        Size     Status     Info
      ----------  ---  -----------  -----  ----------  -------  ---------  --------
    * Volume 2     C   Windows 10   NTFS   Partition    465 GB  Healthy    Boot
    
    DISKPART> select partition 3
    
    The specified partition is not valid.
    Please select a valid partition.
    
    There is no partition selected.
    
    DISKPART> detail partition
    
    There is no partition selected.
    Please select a partition and try again.
    
    DISKPART> select partition 4
    
    The specified partition is not valid.
    Please select a valid partition.
    
    There is no partition selected.
    
    DISKPART> detail partition
    
    There is no partition selected.
    Please select a partition and try again.
    
    DISKPART> select disk 2
    
    Disk 2 is now the selected disk.
    
    DISKPART> detail disk
    
    WDC WD5003AZEX-00MK2A0 ATA Device
    Disk ID: 732A5E45
    Type   : ATA
    Status : Online
    Path   : 1
    Target : 0
    LUN ID : 0
    Location Path : ACPI(_SB_)#ACPI(PCI0)#ACPI(SATA)#ACPI(CHN1)#ATA(C01T00L00)
    Current Read-only State : No
    Read-only  : No
    Boot Disk  : No
    Pagefile Disk  : No
    Hibernation File Disk  : No
    Crashdump Disk  : No
    Clustered Disk  : No
    
      Volume ###  Ltr  Label        Fs     Type        Size     Status     Info
      ----------  ---  -----------  -----  ----------  -------  ---------  --------
      Volume 3     D   Music WD     NTFS   Partition    465 GB  Healthy
    
    DISKPART> list partition
    
      Partition ###  Type              Size     Offset
      -------------  ----------------  -------  -------
      Partition 1    Primary            465 GB  1024 KB
    
    DISKPART> select disk 3
    
    Disk 3 is now the selected disk.
    
    DISKPART> detail disk
    
    ST3500320AS ATA Device
    Disk ID: 49D5850D
    Type   : ATA
    Status : Online
    Path   : 1
    Target : 1
    LUN ID : 0
    Location Path : ACPI(_SB_)#ACPI(PCI0)#ACPI(SATA)#ACPI(CHN1)#ATA(C01T01L00)
    Current Read-only State : No
    Read-only  : No
    Boot Disk  : No
    Pagefile Disk  : No
    Hibernation File Disk  : No
    Crashdump Disk  : No
    Clustered Disk  : No
    
      Volume ###  Ltr  Label        Fs     Type        Size     Status     Info
      ----------  ---  -----------  -----  ----------  -------  ---------  --------
      Volume 4     G   Storage 2 S  NTFS   Partition    465 GB  Healthy
    
    DISKPART> list partition
    
      Partition ###  Type              Size     Offset
      -------------  ----------------  -------  -------
      Partition 1    Primary            465 GB  1024 KB
    
    DISKPART> select partition 1
    
    Partition 1 is now the selected partition.
    
    DISKPART> detail partition
    
    Partition 1
    Type  : 07
    Hidden: No
    Active: No
    Offset in Bytes: 1048576
    
      Volume ###  Ltr  Label        Fs     Type        Size     Status     Info
      ----------  ---  -----------  -----  ----------  -------  ---------  --------
    * Volume 4     G   Storage 2 S  NTFS   Partition    465 GB  Healthy
    
    DISKPART> select partition 2
    
    The specified partition is not valid.
    Please select a valid partition.
    
    There is no partition selected.
    
    DISKPART> detail partition
    
    There is no partition selected.
    Please select a partition and try again.
    
    DISKPART> select disk 4
    
    Disk 4 is now the selected disk.
    
    DISKPART> detail disk
    
    ST3500320AS ATA Device
    Disk ID: BB39DCDC
    Type   : ATA
    Status : Online
    Path   : 0
    Target : 0
    LUN ID : 0
    Location Path : ACPI(_SB_)#ACPI(PCI0)#ACPI(SAT1)#ACPI(CHN0)#ATA(C00T00L00)
    Current Read-only State : No
    Read-only  : No
    Boot Disk  : No
    Pagefile Disk  : No
    Hibernation File Disk  : No
    Crashdump Disk  : No
    Clustered Disk  : No
    
      Volume ###  Ltr  Label        Fs     Type        Size     Status     Info
      ----------  ---  -----------  -----  ----------  -------  ---------  --------
      Volume 5     F   Extra Stora  NTFS   Partition    465 GB  Healthy
    
    DISKPART> list partition
    
      Partition ###  Type              Size     Offset
      -------------  ----------------  -------  -------
      Partition 1    Primary            465 GB  1024 KB
    
    DISKPART> select partition 1
    
    Partition 1 is now the selected partition.
    
    DISKPART> detail partition
    
    Partition 1
    Type  : 07
    Hidden: No
    Active: No
    Offset in Bytes: 1048576
    
      Volume ###  Ltr  Label        Fs     Type        Size     Status     Info
      ----------  ---  -----------  -----  ----------  -------  ---------  --------
    * Volume 5     F   Extra Stora  NTFS   Partition    465 GB  Healthy
    
    DISKPART> exit
      My ComputerSystem Spec

  9.    #9

    Bree said: View Post
    I think what @NavyLCDR spotted (and I didn't) is that in post #1's Disk Management screenshot Disk 1's 'System Reserved' partition is described as 'Healthy (System, Active, Primary Partition)' - 'System' indicating that it was the partition that was booted from.
    Exactly.

    What you look for in diskpart is this:

    Code:
    DISKPART> detail partition
    
    Partition 1
    Type  : 07
    Hidden: No
    Active: Yes
    Offset in Bytes: 1048576
    
      Volume ###  Ltr  Label        Fs     Type        Size     Status     Info
      ----------  ---  -----------  -----  ----------  -------  ---------  --------
    * Volume 1         System Rese  NTFS   Partition    500 MB  Healthy    System
    Under Info - the word System

    Delete that partition and unless there is another active partition on another drive that contains valid boot information, the computer will not boot next time.
      My ComputerSystem Spec


  10. Posts : 26,465
    windows 10 professional version 1607 build 14393.969 64 bit
       #10

    When a drive is GPT versus MBR the EFI partition displays system.
    So if there is a system reserved can that always be deleted? (Is the MSR likely from a prior windows upgrade or something else?)
    The delete system for MSR is applicable to MBR drives only?
    What is meant by booted "from" compared to booted "into"

    So in this thread they can delete on Disk 1 volume 1 or partition 1?
    How did G become active?
    Using disk management there are 2 MSR displayed, one has free space of 469 and the other 108.
    What would be the command to run in diskpart that could display similar information as the offset did not display these numbers in the above results?
      My ComputerSystem Spec


 
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