How does suspicious Unallocated logical partition shows up suddenly?

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  1. Posts : 205
    Windows 7 Home Premium
       #11

    Im sorry, beats me
      My Computer


  2. Posts : 160
    Win 7 64 bit, 6.1.7601 Service Pack 1 Build 7601
    Thread Starter
       #12

    Thanks for providing this informative tutorial on DISKPART. I learned a lot about this powerful windows utility. I like to pick up your brain for the situation I have.

    I have a black screen during start up issue. I posted a thread (long story). I have Lenovo Z580 Laptop. I did not add any hardware or alter HDD configuration after factory install.

    Win 7: Black screen on boot up, before login screen?

    As this community, provided guidance on my thread. I created a Win 7 repair disk using another computer with Win 7, 64 bit.

    With community help. I run the partition Wizard on this Z580 and leaned that a suspicious 201.87 MB Unallocated logical partition shown in Partition Wizard.

    As this unallocated - 200 MB sitting as 5th partition and violates MBR characteristics and cause booting issue.


    How does suspicious Unallocated logical partition shows up suddenly?

    I am not able to see unallocated partition via DISKPART. Here is my DISKPART.

    Code:
    DISKPART> list disk
     
      Disk ###  Status         Size     Free     Dyn  Gpt
      --------  -------------  -------  -------  ---  ---
      Disk 0    Online          698 GB      0 B
      Disk 1    Online          979 MB      0 B
     
    DISKPART> select disk 0
     
     
    DISKPART> list partition
     
      Partition ###  Type              Size     Offset
      -------------  ----------------  -------  -------
      Partition 1    Primary            200 MB  1024 KB
      Partition 2    Primary            653 GB   201 MB
      Partition 3    Primary             25 GB   653 GB
      Partition 4    OEM                 19 GB   679 GB
     
    DISKPART> list volume
     
      Volume ###  Ltr  Label        Fs     Type        Size     Status     Info
      ----------  ---  -----------  -----  ----------  -------  ---------  -------
      Volume 0     F                       DVD-ROM         0 B  No Media
    * Volume 1     C                NTFS   Partition    200 MB  Healthy
      Volume 2     D   Windows7_OS  NTFS   Partition    653 GB  Healthy
      Volume 3     E   LENOVO       NTFS   Partition     25 GB  Healthy
      Volume 4     G                FAT    Removable    979 MB  Healthy
      Volume 5         LENOVO_PART  NTFS   Partition     19 GB  Healthy    Hidden
    Thanks for your insight.
    Last edited by Brink; 18 Aug 2015 at 21:28. Reason: moved to original thread
      My Computer


  3. Posts : 205
    Windows 7 Home Premium
       #13

    I think i see the problem
    Go to diskpart
    Select disk 0
    Select part 2
    Active

    Then go to d n do
    Dir /p
    N make sure it has windows
    If it has then
    Bcdboot d:\windows d: /s
    Then
    bootrec /fixmbr
    Bootrec /fixboot
    Bootrec /rebuildbcd

    Most prob this will solve it

    The 200mb thing should b a system part which might have gone corrupt
      My Computer


  4. Posts : 12,012
    Windows 7 Home Premium SP1, 64-bit
       #14

    "Unallocated" is not a partition. It's unallocated space. I would not expect it to show up in Diskpart.
      My Computer


  5. Posts : 205
    Windows 7 Home Premium
       #15

    First im concerned about ur computer starting hence gave u solution... some app may have created that partition... see its under partition
      My Computer


  6. Posts : 160
    Win 7 64 bit, 6.1.7601 Service Pack 1 Build 7601
    Thread Starter
       #16

    Thanks for re-looking. It is interesting to see your prospective.

    @ignatzatsonic , @nooruddin76

    "Unallocated" is not a partition. It's unallocated space. I would not expect it
    to show up in Diskpart.
    You mean, this unallocated - 200 MB not sitting as 5th partition and violates MBR characteristics and cause booting issue.

    How do we consume this unallocated space then?



    I did SFC /scannow using win7 repair disc, because I have booting issue.
    This command returns

    Code:
    "There is a system repair pending which requires reboot to complete. Restart 
     
    windows and run sfc again. I ran couple of times. I am getting the same 
     
    message."How do I proceed with SFC /SCANNOW ?
    I did dism.exe /image:C:\ /cleanup-image /revertpendingactions

    It give error 2

    Thanks for helping.

    I followed your steps:

    Went to diskpart
    Select disk 0
    Select part 2
    Active ===> Made Part 2 active
    Exit Diskpart

    Then went to d n do
    Dir /p
    N found it has windows

    I did
    Bcdboot d:\windows d: /s

    from D:\ & d:\windows

    in both cases it is not picking up. It list bcdboot help list as though I entered bcdboot /?

    I tried Bcdboot d:\windows /s got the same bcdboot help list as though I entered bcdboot /?

    Is Bcdboot d:\windows ==> reversible?

    Do you mind, explaining what are we try doing here?

    Any thoughts?
    Last edited by MDRI; 19 Aug 2015 at 16:05.
      My Computer


  7. Posts : 205
    Windows 7 Home Premium
       #17

    We r trying to make d drive which has windows as active boot partition
    So that we could take care of the other 200mb space later
      My Computer


  8. Posts : 205
    Windows 7 Home Premium
       #18

    May b the correct usage is
    Bcdboot d:\windows /s d:

    Yes this is the correct usage checked it, here

    https://technet.microsoft.com/en-us/...(v=ws.10).aspx
      My Computer


  9. Posts : 160
    Win 7 64 bit, 6.1.7601 Service Pack 1 Build 7601
    Thread Starter
       #19

    Thanks for your idea. I did the following

    Code:
    DISKPART> list disk
     
      Disk ###  Status         Size     Free     Dyn  Gpt
      --------  -------------  -------  -------  ---  ---
      Disk 0    Online          698 GB      0 B
      Disk 1    Online          979 MB      0 B
     
    DISKPART> select disk 0
     
    Disk 0 is now the selected disk.
     
    DISKPART> list partition
     
      Partition ###  Type              Size     Offset
      -------------  ----------------  -------  -------
      Partition 1    Primary            200 MB  1024 KB
      Partition 2    Primary            653 GB   201 MB
      Partition 3    Primary             25 GB   653 GB
      Partition 4    OEM                 19 GB   679 GB
    DISKPART> select part 2
     
    Partition 2 is now the selected partition.
     
    DISKPART> active
     
    DiskPart marked the current partition as active.
     
    DISKPART> detail partition
     
    Partition 2
    Type  : 07
    Hidden: No
    Active: Yes
    Offset in Bytes: 210763776
     
      Volume ###  Ltr  Label        Fs     Type        Size     Status     Info
      ----------  ---  -----------  -----  ----------  -------  ---------  --------
    * Volume 2     D   Windows7_OS  NTFS   Partition    653 GB  Healthy
     
    D:\>dir /p
     Volume in drive D is Windows7_OS
     Volume Serial Number is F623-77B7
     
     Directory of D:\
     
    05/06/2012  03:02 AM    <DIR>          Intel
    07/13/2009  07:20 PM    <DIR>          PerfLogs
    07/23/2015  11:12 AM    <DIR>          Program Files
    07/16/2015  04:53 AM    <DIR>          Program Files (x86)
    03/01/2015  05:49 AM             6,614 setuplog.txt
    12/15/2012  11:44 AM    <DIR>          Ubisoft
    03/01/2015  05:49 AM             7,792 uninstal.log
    09/08/2012  05:42 PM    <DIR>          Users
    08/13/2015  11:02 PM    <DIR>          Windows
     
    D:\>bcdboot d:\windows /s d:
     
    Boot files successfully created.
     
    D:\>bootrec /fixmbr
    The operation completed successfully.
     
    D:\>bootrec /fixboot
    The operation completed successfully.
     
    D:\>bootrec /rebuildbcd
    Scanning all disks for Windows installations.
     
    Please wait, since this may take a while...
     
    Successfully scanned Windows installations.
    Total identified Windows installations: 0
    The operation completed successfully.
    I restarted . I saw two windows 7 as below:

    Windows 7
    Windows 7

    to pick.

    I pick 1 first time & 2 second time.

    It looks like I have two boot records now.

    No change in outcome === > same black screen with cursor in the middle.

    Thanks for helping.

    Awaiting for next steps.

    **** I tried SAFE Mode. It loaded couple of drivers and paused at CLASSPNP.SYS load. It went to Black screen with cursor at center. ===> Does it mean something to you?
    Last edited by MDRI; 20 Aug 2015 at 09:23.
      My Computer


  10. Posts : 205
    Windows 7 Home Premium
       #20

    May b i need to actually see the screen n what happens... i think i can do something, but i cant let u mess up alone
    Btw ... if u want to recover data, do u have some software for that ?
      My Computer


 
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