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Windows 7: Missing existing partition

13 Apr 2010   #1
agmck

Windows 7 Pro
 
 
Missing existing partition

Hi
I have a 250Gb HDD that is partitioned into two parts. I run W7 32bit. I have alwyas had the second partition as D drive and the first partition containing my boot as C drive. I recently added an external hdd and this is shown as E drive - my DVD is set as G drive.
When I go into EXplorer, Disk Mgt I cannot see the D drive partition and the C drive shows as only 123.xxGb - see attachment. I have tried allocating different drive letters, BIOS is up to date. Tried some partitioning software but the system ony allows them to scan C drive (123.xxGb).
If I unplug the external hdd and re-start the system the external hdd still shows.

I am yet to try a 6kg hammer but it's getting to that point - I'm missing something simple here I hope - please help!




Attached Files
File Type: doc missing part.doc (117.5 KB, 37 views)
My System SpecsSystem Spec
.

13 Apr 2010   #2
Bill2

Windows 7 x64 pro/ Windows 7 x86 Pro/ XP SP3 x86
 
 

Open an administrative command window. type Diskpart and hit enter.

Type the following commands and hit enter after each.

List Disk

This should show you your drive/drives.

select disk 0

If you only have one drive, use 0. Otherwise use the number of the drive you want.

list partition

Post back what this result is, then select the partition you want and

select partition 2

this is the 2nd partition on the drive.

If you do not see the second partition, it does not bode well.

If you have the second partition, try this

assign letter=D

Type exit and exit to close diskpart and close the window.
My System SpecsSystem Spec
13 Apr 2010   #3
agmck

Windows 7 Pro
 
 

Thanks for your help - here is the attachment of diskpartition results.

I think what's confusing me is the 3 "partitions" shown - I can only access 2 in explorer or disk mgt.

Can you pls advise me further?

Thanks in anticipation.


Attached Files
File Type: doc disk part.doc (66.0 KB, 69 views)
My System SpecsSystem Spec
.


13 Apr 2010   #4
Dzomlija

Windows 7 Ultimate x64
 
 

Quote   Quote: Originally Posted by agmck View Post
Hi
I have a 250Gb HDD that is partitioned into two parts. I run W7 32bit. I have alwyas had the second partition as D drive and the first partition containing my boot as C drive. I recently added an external hdd and this is shown as E drive - my DVD is set as G drive.
When I go into EXplorer, Disk Mgt I cannot see the D drive partition and the C drive shows as only 123.xxGb - see attachment. I have tried allocating different drive letters, BIOS is up to date. Tried some partitioning software but the system ony allows them to scan C drive (123.xxGb).
If I unplug the external hdd and re-start the system the external hdd still shows.

I am yet to try a 6kg hammer but it's getting to that point - I'm missing something simple here I hope - please help!
Quote   Quote: Originally Posted by agmck View Post
Thanks for your help - here is the attachment of diskpartition results.

I think what's confusing me is the 3 "partitions" shown - I can only access 2 in explorer or disk mgt.

Can you pls advise me further?

Thanks in anticipation.
I've taken the liberty of making your screenshot more accesible and have attached it to my reply. You might want to look at this post: A Preferred Method of Uploading/Posting Screen Shots.

-partitions.jpg
agmck - Original Screenshot
Now, to my reply.

What you see in explorer as drive E: is NOT your external drive, but is in fact the second partition of your 250GB drive. Your C: is 123.71GB, and E: is 109.17, which adds up to 232.88GB, which is about right for a 250GB drive had you created one single primary partition.

You have there two partitions, a primary and an extended. The extended contains a logical drive. This arrangement works well if you intend to slit a drive into more than 4 partitions (one primary, one extended containing X number of logical drives). The reason being that any sized drive is limited to a maximum of 4 primary partitions.

Nobody really uses the Primary/Extended+Logical arrangement anymore, which was popular in the days of DOS/Win9x and FAT16/FAT32 and a large drive had to be split into more manageable sizes that work with FAT which was I think limited to 20GB?. Most people these days split a drive into 2 primary, a smaller one around 120GB for the OS, and whatever is left for data, and then format those partitions as NTFS, thus eliminating the need for Extended+Logical partitions.

Me, I just avoid partitions entirely, and will rather add a second physical drive. I currently have 9:

-partitions2.jpg
Prometheus Hard Drives

You can see that even Windows prefers to use primary partitions during installation, as it creates a "System Reserved" parition, and whataever is left for the OS (unless you customize it during installation).

I don't know how you got it to be that way, but perhaps the partitioning software you used somehow cloned your external drive onto the second partition? Whatever used to be on what was the D: is unfortunately gone .

Hope this helps


My System SpecsSystem Spec
13 Apr 2010   #5
Bill2

Windows 7 x64 pro/ Windows 7 x86 Pro/ XP SP3 x86
 
 

Dont worry about the 3 partitions. Partition 0 is just an extended partition. An extended partition can contain multiple logical drives. In your case there is a single extended partition (partition 0) containing a single logical drive (partition 2). When your system was partitioned, the operator chose to create partitions that way.

Now, can you access the D: partition normally at all? What i mean is do you have any data on it that you wish to preserve? To backup the data, you need to be able to access the partition. If you have no data, then you can simply go to diskpart again, select partitions 0 and 2 and delete them. That should show up in Disk management as unallocated space, which can then be partitioned afresh. Alternatively, the partitioning can be done from diskpart.
My System SpecsSystem Spec
13 Apr 2010   #6
agmck

Windows 7 Pro
 
 

Thanks to both of you - very clearly explained and I'll backup my data from the drive and remove partitions 0 and 2. Then I can create another partition. Thanks to Bill2 and Dzomlija - and I'll check out the post for uploading screen shots.

Greg
My System SpecsSystem Spec
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 Missing existing partition




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