# How to make a read protection on eMMC?

**URL:** https://dietpi.com/forum/t/how-to-make-a-read-protection-on-emmc/14982
**Category:** General Discussion
**Created:** [17 November 2022 09:09 UTC](https://dietpi.com/forum/t/how-to-make-a-read-protection-on-emmc/14982 "2022-11-17T09:09:17Z")
**Posts on this page:** 6
**Page:** 1

<div class="post-metadata">

### Author: ![Powerball](https://dietpi.com/forum/letter_avatar_proxy/v4/letter/p/e9a140/32.png) [@Powerball](https://dietpi.com/forum/u/Powerball)
#### Post date: [17 November 2022 09:09 UTC](https://dietpi.com/forum/t/how-to-make-a-read-protection-on-emmc/14982/1 "2022-11-17T09:09:18Z")

</div>

How to make a read protection on eMMC?

---

<div class="post-metadata">

### Author: ![Jappe](https://dietpi.com/forum/user_avatar/dietpi.com/jappe/32/1788_2.png) [@Jappe](https://dietpi.com/forum/u/Jappe)
#### Post date: [17 November 2022 11:32 UTC](https://dietpi.com/forum/t/how-to-make-a-read-protection-on-emmc/14982/2 "2022-11-17T11:32:23Z")

</div>

Do you mean read-only?  
Or do you want really that nobody is able to read from it? Then just remove the eMMC module or don’t mount it?

---

<div class="post-metadata">

### Author: ![Powerball](https://dietpi.com/forum/letter_avatar_proxy/v4/letter/p/e9a140/32.png) [@Powerball](https://dietpi.com/forum/u/Powerball)
#### Post date: [17 November 2022 13:26 UTC](https://dietpi.com/forum/t/how-to-make-a-read-protection-on-emmc/14982/3 "2022-11-17T13:26:09Z")

</div>

> [@Jappe](#):
>
> want really that nobody is able to read from it

I want really that nobody is able to read from eMMC

---

<div class="post-metadata">

### Author: ![Joulinar](https://dietpi.com/forum/user_avatar/dietpi.com/joulinar/32/57_2.png) [@Joulinar](https://dietpi.com/forum/u/Joulinar)
#### Post date: [17 November 2022 14:03 UTC](https://dietpi.com/forum/t/how-to-make-a-read-protection-on-emmc/14982/4 "2022-11-17T14:03:24Z")

</div>

what is stored on the eMMC?

---

<div class="post-metadata">

### Author: ![StephanStS](https://dietpi.com/forum/user_avatar/dietpi.com/stephansts/32/2522_2.png) [@StephanStS](https://dietpi.com/forum/u/StephanStS)
#### Post date: [17 November 2022 15:58 UTC](https://dietpi.com/forum/t/how-to-make-a-read-protection-on-emmc/14982/5 "2022-11-17T15:58:15Z")

</div>

I assume that the read-protected status shall only be timely limited, i.e. a kind of “storing information and prevent others reading it” (e.g. after a system startup procedure with read access).

`<joke>`  
Otherwise:  
A long time ago, in a Chip magazine at April 1st, there was an article about a radical new memory type:  
WOM → Write only memory. 😂

If the state shall never be set back, a simple `chmod -R 000 /mnt/<diskname>` resp. `chmod -R ugo-rwx /mnt/<diskname>` could do the trick. Never tried this.  
Another option could be `rm -Rf /mnt/<diskname>`.  
`</joke>`

---

<div class="post-metadata">

### Author: ![Joulinar](https://dietpi.com/forum/user_avatar/dietpi.com/joulinar/32/57_2.png) [@Joulinar](https://dietpi.com/forum/u/Joulinar)
#### Post date: [17 November 2022 16:27 UTC](https://dietpi.com/forum/t/how-to-make-a-read-protection-on-emmc/14982/6 "2022-11-17T16:27:01Z")

</div>

Still, I like to understand the use case. What is the eMMC used for? To host some confidential data or is it the whole operating system? At the end it sounds like disk encryption. Which is going to work for a data store but for whole os, it will be challanging.