/data on another disk about tegra-demo-distro HOT 3 CLOSED

Hi @maggu2810

Should I create a service that checks if /dev/sda1 exists and if it is missing, it creates it using parted and mkfs.ext4 calls? Hook this before /data is mounted?

The way I've handled this in the past is by using a custom platform-pre-switchroot which will allow you to run custom steps during the init process and before the rootfs is mounted and the remaining services which may need to use the /data partition try to start.

Since the last time I set this up there have been some new changes in https://github.com/OE4T/meta-tegra/wiki/initrd-flashing-support to support flashing alternate devices at startup, however based on a quick search of the script at https://github.com/OE4T/meta-tegra/blob/master/recipes-bsp/tegra-binaries/tegra-helper-scripts/initrd-flash.sh it appears this will only support flashing other devices when the rootfs is located there ($ROOTFS_DEVICE). So I suspect your best option is still to use platform-pre-switchroot or similar.

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Hi @dwalkes ,
/etc/platform-pre-switchroot is a possible hook. Thanks for pointing me to that direction.
I will give it a try.

I am pretty sure I will find it while reading the existing recipes etc. As you did already something similar can you point me to some changes that are necessary? Then I can move forward faster.

• Recipe to add a platform-pre-switchroot script to the initrd
• Add partition tool (e.g. parted), mkfs.ext4, etc. to initrd
• ... things I am currently not aware of ...

Thanks again

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I assume I found the most of relevant information.

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