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Windows 7: How does suspicious Unallocated logical partition shows up suddenly?

18 Aug 2015   #11
nooruddin76

Windows 7 Home Premium
 
 

Im sorry, beats me


My System SpecsSystem Spec
.
18 Aug 2015   #12
MDRI

Win 7 64 bit, 6.1.7601 Service Pack 1 Build 7601
 
 

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.
My System SpecsSystem Spec
19 Aug 2015   #13
nooruddin76

Windows 7 Home Premium
 
 

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 System SpecsSystem Spec
.

19 Aug 2015   #14
ignatzatsonic

Microsoft Community Contributor Award Recipient

Windows 7 Home Premium SP1, 64-bit
 
 

"Unallocated" is not a partition. It's unallocated space. I would not expect it to show up in Diskpart.
My System SpecsSystem Spec
19 Aug 2015   #15
nooruddin76

Windows 7 Home Premium
 
 

First im concerned about ur computer starting hence gave u solution... some app may have created that partition... see its under partition
My System SpecsSystem Spec
19 Aug 2015   #16
MDRI

Win 7 64 bit, 6.1.7601 Service Pack 1 Build 7601
 
 

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

@ignatzatsonic , @nooruddin76

Quote:
"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?
My System SpecsSystem Spec
19 Aug 2015   #17
nooruddin76

Windows 7 Home Premium
 
 

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 System SpecsSystem Spec
19 Aug 2015   #18
nooruddin76

Windows 7 Home Premium
 
 

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 System SpecsSystem Spec
19 Aug 2015   #19
MDRI

Win 7 64 bit, 6.1.7601 Service Pack 1 Build 7601
 
 

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?
My System SpecsSystem Spec
20 Aug 2015   #20
nooruddin76

Windows 7 Home Premium
 
 

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 System SpecsSystem Spec
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 How does suspicious Unallocated logical partition shows up suddenly?




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