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Windows 7: "D: system" partition

14 Feb 2010   #1

Windows 7
"D: system" partition

I have a new laptop that came with pre-installed Windows 7 home premium 64 bit. It had 2 partitions when it arrived:

1) a large partition labeled "C: Local Disk"
2) a small 200 mb partition labeled "D: System"

Looking at the contents of D: I see it contains the following folders:
a) recycle.bin
b) Boot (which seems to contain language files)
c) System Volume (which I cannot access)
and a file "bootmgr"

Why does this partition (that contains the bootmgr and boot file) have a drive letter? Would it not be safer if it did _not_ have a drive letter = to avoid accidental injury?

If I remove its drive letter, will the laptop still boot correctly?

Is this what used to be called the mbr hidden partition?


My System SpecsSystem Spec
14 Feb 2010   #2


Look in Disk Mgmt to see if D is marked Active.

Post back a full DMgmt drive map and listings screenshot using Snipping Tool in Start Menu, attach file with paper clip in Reply Box.
My System SpecsSystem Spec
14 Feb 2010   #3

WIN 7 x64

Quote   Quote: Originally Posted by Anderson2 View Post

Why does this partition (that contains the bootmgr and boot file) have a drive letter? Would it not be safer if it did _not_ have a drive letter = to avoid accidental injury?
Just hide the partition!
My System SpecsSystem Spec

14 Feb 2010   #4

Windows 7 x64

It isn't really hidden without a drive letter, but you can remove it if you wish.
My System SpecsSystem Spec
14 Feb 2010   #5

Windows 7

Thanks Gregrocker. I attached the image.
As you will see, I've added a data partition F:, so I know my way around disk partitioning.

The partition I am curious about is the small 200MB D: partition (which came with the pre-installed laptop) of which 166 MB is free. It is not a problem but because I am new to W 7 I am trying to understand. It does not seem to make sense to me that a mbr partition should have its own drive letter where someone might inadvertently write to it. (Trying to learn without losing the ability to reboot the laptop!).

Attached Thumbnails
"D: system" partition-disk-partitions.png  
My System SpecsSystem Spec
14 Feb 2010   #6

Windows 7 Home Premium 64bit

it is normal for Win7 to create a small partition like that for system files.

However, it usualy hidden (except from certain programs like defragmenters and Acronis that see it)
and has no drive letter.

Bit odd.
My System SpecsSystem Spec
14 Feb 2010   #7

Windows 7

I thought so too. It's a HP laptop.
My System SpecsSystem Spec
14 Feb 2010   #8

Windows 7 Ultimate 32 bit

I would not delete that partition if you do it may not boot correctly
My System SpecsSystem Spec
14 Feb 2010   #9

Microsoft Community Contributor Award Recipient

Vista x64 / 7 X64

To get rid of the letter, open an elevated cmd, type:


sel vol d


My System SpecsSystem Spec
14 Feb 2010   #10


It looks right to me. Just the System Active MBR partition with possibly some extra files (drivers?).

Unhide System and Hidden files in Control Panel>Folder Options>view tab to see if anything else is in there.

You're right, however, about the problem with a drive letter enabling Backup or other files to write there. We see this problem a lot here.

We can of course help you remove it to recover it's space and System active MBR into Win7.

However with all the space you have there, I'd just follow SIW2's commands above to remove the drive letter.
My System SpecsSystem Spec

 "D: system" partition

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