# Modify partition layout

This explains how to add, delete, modify, or rename partitions.

Configuration files that define partitions for the UFS and eMMC devices are located at:

- `layers/meta-qcom-hwe/recipes-devtools/partition-utils/qcom-partition-confs/ufs/qcm6490-partitions.conf` (for UFS)
- `layers/meta-qcom-hwe/recipes-devtools/partition-utils/qcom-partition-confs/emmc/qcm6490-partitions.conf` (for eMMC)

To add a partition, add a row entry to this file. To remove a partition, delete the corresponding entry to remove the target partition from the set of images to be flashed.

Many partitions are crucial for functionality. To understand the details
of how this file plays a role in generating the partition table, see [Manage partitions in Qualcomm Linux](https://docs.qualcomm.com/doc/80-70030-27/topic/managing_partitions_in_qualcomm_linux.html#managing-partitions-in-qualcomm-linux).

## Add a partition

To add a partition with name `test` in `LUN0`, add the following line to
`qcm6490-partitions.conf` after the `LUN0` section:

--partition --lun=0 --name=test --size=4096KB --type-guid=1B81F7E6-F50D-419B-A739-2AEFF8DA3335
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This adds a 4 MB partition test to `LUN0` and a GUID
determined by you. This partition isn’t flashed with any image,
but it’s available as a raw partition after the device boots up. Because
this partition is added to `LUN0`, it shows up at either of the following
options:

- `/dev/sda<N>`
- `/dev/disk/by-partlabel/test`

Note

To reflect the changes in `qcm6490-partitions.conf`, update the preferred provider. For more information, see [Modify partition](https://docs.qualcomm.com/doc/80-70030-27/topic/managing_partitions_in_qualcomm_linux.html#modify-partition).

## Add a partition with a binary

1. To add a partition with a binary to be flashed to the created partition with name `test1` in `LUN0`, add the following line
to `qcm6490-partitions.conf` after the `LUN0` section:

--partition --lun=0 --name=test --size=4096KB --type-guid=1B81F7E6-F50D-419B-A739-2AEFF8DA3335 --filename=test1.bin
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2. Deploy the new `test1.bin` binary in
`build-qcom-wayland/tmp-glibc/deploy/images/qcs6490-rb3gen2-core-kit/$(image_name)`.

## Next steps

- Customize kernel

    To customize the kernel, see [Qualcomm Linux Kernel Guide](https://docs.qualcomm.com/bundle/publicresource/topics/80-70030-3/).

Last Published: Jun 23, 2026

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