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I am using a Ubuntu LIVE USB to boot my laptop. However, after I enter the system, I am able to see my C: drive.

Question: Is it possible that I can completely block the access of the internal hard drive from accessing through the Ubuntu?

Thank you

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You can dismount the device. Of course this also means you can mount it. This of course also would require sudio permissions or if not I am sure it can be configured to be. – Ramhound Sep 11 '13 at 16:54
How can I dismount the internal hard drives? – q0987 Sep 27 '13 at 14:44
@qq0987 - Just use umount and mount. I would look up the command to understand the required syntax required to use it of course. – Ramhound Sep 27 '13 at 15:09
Unmounting does not solve the ops issue – Bruno9779 May 23 '14 at 16:30

The only way to prevent access to a disk, to someone that has physical access to it, is encrypting it.

Depending on what system(s) is installed on the disk you want to protect, the software and the difficulty of encrypting will vary.

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More detail would improve this answer. – Dave M May 23 '14 at 16:54
This does not provide an answer to the question. To critique or request clarification from an author, leave a comment below their post. – Dave M May 23 '14 at 16:55
How so? The only way to prevent access to a disk when you have physical access to it, is encrypting it. The OP didn't state what system is on the disk he wants to protect, so, all he asked has been answered – Bruno9779 May 23 '14 at 16:58

Think this would help

1- Power on your computer and press the "F2" or "Delete" key when you first see text appear on the screen. This will open the BIOS menu. If neither of these keys work, look closely at the text when the computer first starts. It will tell you the keyboard key to press.

2- Navigate using the arrow keys on your keyboard. Each BIOS is different, so reference the legend located on the screen to assist you in navigation and making changes.

3- Find a menu labeled "Hardware" or simply browse each one until you see a listing of drives. They are typically labeled by their model number (see Resources).

4- Highlight the drive using the arrow keys to navigate and press "Enter" to get a listing of options for it. Highlight "Disabled" or "None" using the arrow keys and press "Enter."

5- Navigate to the "Exit" menu and find an option typically labeled "Save settings and exit." Highlight it and press "Enter." You will be asked to confirm your choice; do so. Check the legend of your BIOS as well, as this option may have a shortcut key; a common one is "F10."

Read more :

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The question asks about disabling only while in the live session. Access is still desired when booted normally. – fixer1234 Apr 16 '15 at 5:05

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