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Here's how my hard drive is partitioned:

Recovery Partition 21 GB (primary partition)
C: 101 GB (Primary partition)
D: 141 GB (logical drive)
E: 141 GB (logical drive)
F: 190 GB (logical drive)
SYSTEM: 100 MB (primary partition)

The Recovery Partition is empty, hidden and no letter is being assigned to it. I want to use it to save an image of my current state of Windows. But it is undetectable to any Windows software.

Also, what is the difference between a primary partition and a logical drive?

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3 Answers

  • Right-Click "Computer", Click on "Manage" (you need Admin rights for that!) and select "Disk Management" in the right area of the upcomming window.
  • Right-Click your hidden partition and click "Change Drive Letter and Paths..."

    enter image description here

  • Click "Add...", select a drive letter and click "OK" in both of the small windows.

    enter image description here


A primary partition is the a partition on a harddrive. You can create up to four primary partitions. When you want to create more then four partitions, you have to create 3 primary partitions and one extended, which is a workaround to create more partitions. All further partitions created in the extended partitions are called logical drives. Booting is only possible from a primary partition.
See also: http://windows.microsoft.com/en-us/windows-vista/What-are-partitions-and-logical-drives

Edit: Seems like Windows only allows 3 primary partitions. Might be so to prevent users from creating 4 primary partitions so they don't have to delete one partition to create an extended one. Windows 7 only allows the fourth partition to be an extended partition.

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When you have some partitions hidden to your system, that's because they have the flag "hidden" applied to them.

I use a free application to manipulate all available flags and other disk operations:

MiniTool Partition Wizard Home Edition 7.5

  1. On the list, right click the desirable partition;
  2. Access "Modify";
  3. Click over "Unhide Partition";
  4. On the far left of your toolbar, press "Apply" to save the settings to the disk;

Change Hidden Flag

When finished, you may need to restart the PC to have windows presenting the new partition.

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If you boot with a linux boot disk such as knoppix you can use fdisk(8) to make a partition not hidden.

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