[yocto] Resizing rootfs on first boot

[li_hong]

Hi Team，

I'm using Yocto project and I use i.MX6 sabre-SD Quad as my platform.

I'd like to be able to bulid an SD card image ,deloy to a system on a 8G emmc.

While boot up  device and entry terminal ,I find out the root mounted only 2.6G,

How to resize automatically on fist boot.

Thank you in advance.

[glennelliott]

Anyone suggesting that you must manually resize the partition, or inflate the partition in Yocto, has never had the joy of using a Raspberry Pi sdcard image.  It automatically increases the filesystem/partition on first boot if there is available space.

[davidvescovi]

If you are using an SD card it might be easier to just plug it into a USB card reader, attach it to a ubuntu machine and use the disk tools to expand the partition. 

[gusarambula]

Hello Hong Li,

The SD card image generated depends on the size of the rootfs. The easiest way to add more space would be to edit the EXTRA_SPACE variable in Yocto. You can see a bit more on how to do this on the following Community Document.

https://community.nxp.com/docs/DOC-105521

Otherwise you would need to use u-boot to resize the partition through a script before loading the kernel and rootfs, but I haven’t tested this option.

I hope this helps!

Regards,