# Cn9130 : about the media used
**URL:** https://community.solid-run.com/t/cn9130-about-the-media-used/562
**Category:** OCTEON CN9130
**Created:** [January 20, 2023, 6:19pm UTC](https://community.solid-run.com/t/cn9130-about-the-media-used/562 "2023-01-20T18:19:48Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@doudootiana](https://community.solid-run.com/u/doudootiana)
#### Post date: [January 20, 2023, 6:19pm UTC](https://community.solid-run.com/t/cn9130-about-the-media-used/562/1 "2023-01-20T18:19:48Z")
Hy 🙂
For my porject, i select to boot on SD card or emmc thanks to the u-boot.
But when Linux was loaded, i need to know if i use the SD card or the Emmc.
In the dmesg, i see this :
```auto
[5.212397] Run /init as init process
[5.216077] with arguments:
[5.219087] /init
[5.221407] with environment:
[5.221560] mmc1: new high speed SDHC card at address 0001
[5.224588] HOME=/
[5.230483] mmcblk1: mmc1:0001 00000 29.8 GiB
[5.232483] TERM=linux
[5.238196] mmcblk1: p1 p2 p3
[5.239653] board=pro
[7.280315] random: crng init done
```
Can i recover this information with a command line?
Actually, to know where i am, i do this :
-Create a folderwithe a command line in uboot
-In bash script : look for this folder in sd card and emmc.
Thanks by advance 🙂
---
### Author:  [@jnettlet](https://community.solid-run.com/u/jnettlet)
#### Post date: [January 21, 2023, 5:57am UTC](https://community.solid-run.com/t/cn9130-about-the-media-used/562/2 "2023-01-21T05:57:14Z")
do you need to know which device you booted the bootloader from, or which device your Linux system is booted from? For instance, you can boot the u-boot firmware from uSDHC but still run Linux from the eMMC depending on your settings in u-boot.
If it is the latter then you can use the `lsblock -l` to see what devices are used.