# Mount internal flash when booted from SD-Card

**URL:** <https://www.wago.community/t/mount-internal-flash-when-booted-from-sd-card/1420>\
**Category:** Hardware and Linux\
**Tags:** pfc200, how-to, linux\
**Created:** [December 12, 2024, 2:15pm UTC](https://www.wago.community/t/mount-internal-flash-when-booted-from-sd-card/1420 "2024-12-12T14:15:32Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![VincentL](https://avatars.discourse-cdn.com/v4/letter/v/da6949/32.png) [@VincentL](https://www.wago.community/u/VincentL)\
**Post date:** [December 12, 2024, 2:15pm UTC](https://www.wago.community/t/mount-internal-flash-when-booted-from-sd-card/1420/1 "2024-12-12T14:15:32Z")

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I have a PFC 750-8204 controller. Because there is an issue with the controller I am booting from an sd-card. After the boot I want to access the internal flash drive. Is it possible to mount the flash or is there another way to access the flash drive when booted from an sd-card?

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**Author:** ![edwin](https://avatars.discourse-cdn.com/v4/letter/e/73ab20/32.png) [@edwin](https://www.wago.community/u/edwin)\
**Post date:** [December 16, 2024, 11:24am UTC](https://www.wago.community/t/mount-internal-flash-when-booted-from-sd-card/1420/2 "2024-12-16T11:24:22Z")

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The pfc has fixed names, for disks and partitions. e.g.:  
/dev/mmcblk1p7. Which is the internal memory’s main partition.  
/dev/mmcblk0p2. Which is the SD card’s main partition.

Boot from SD card and login.  
mkdir /mnt/internal  
mount /dev/mmcblk1p7 /mnt/internal  
ls /mnt/internal

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<div class="post-metadata">

**Author:** ![VincentL](https://avatars.discourse-cdn.com/v4/letter/v/da6949/32.png) [@VincentL](https://www.wago.community/u/VincentL)\
**Post date:** [December 17, 2024, 10:10am UTC](https://www.wago.community/t/mount-internal-flash-when-booted-from-sd-card/1420/3 "2024-12-17T10:10:10Z")

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> [@edwin](#):
>
> mount /dev/mmcblk1p7 /mnt/internal

Hello Edwin,

Thanks for the responce. I have tried your solution and this is the result:

 ![Screenshot](https://us1.discourse-cdn.com/flex016/uploads/wago/original/2X/2/2b45cb222d27e5ca25f54ea560104ebf85bd0fc7.jpeg)

The internal flash doesn’t seem to exist.

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<div class="post-metadata">

**Author:** ![edwin](https://avatars.discourse-cdn.com/v4/letter/e/73ab20/32.png) [@edwin](https://www.wago.community/u/edwin)\
**Post date:** [February 7, 2025, 9:28am UTC](https://www.wago.community/t/mount-internal-flash-when-booted-from-sd-card/1420/4 "2025-02-07T09:28:09Z")

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The ‘old’ pfc200 has ‘ubi’ / ‘mtd’ flash.  
And ubiattach command is needed first.

> ubiattach -p /dev/mtd8  
> mkdir /mnt/ubi0\_mtd8  
> mount -t ubifs ubi0\_8 /mnt/ubi0\_mtd8

Note of warning: Be extremely careful when handling the internal flash. **A corrupt flash destroys the unit!**