> ## Documentation Index
> Fetch the complete documentation index at: https://dragonwingdocs.qualcomm.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Persist partition

The board support package (BSP) software components use the persist partition defined for the universal flash storage (UFS) or embedded multimedia card (eMMC) to store persistent data across reboots.

**Note**

The files under the persist partition are supposed to remain intact, even after reboots and OTA updates. Therefore, erasing or wiping the entire partition to delete files isn't recommended.

## **Persist mount point**

The `/var/lib/tee` directory is a mount point for a file system created on the persist partition. The `recipes-bsp/partition/mount-tee-partition_1.0.bb` recipe is responsible for installing the `var-lib-tee.mount`systemd unit to `local-fs.target`.

At boot up, the `var-lib-tee.mount` systemd unit creates `/var/lib/tee` path and mounts `/dev/disk/by-partlabel/persist` on `/var/lib/tee`.

To verify the systemd mount unit status, run:

```bash theme={null}
systemctl status var-lib-tee.mount
```

To display the persist mount point, run:

```text theme={null}
mount | grep "/var/lib/tee"
```

Expected output:

```text theme={null}
/dev/sdfX on /var/lib/tee type ext4 (rw,relatime,stripe=128)
```

## **Next steps**

* For partition layout and Ptool workflow, see [Manage partitions in Qualcomm Linux](./manage-partitions-in-qualcomm-linux).
* For OTA update behavior with persistent directories, see [Update firmware and OS on Qualcomm Linux using capsule and OSTree mechanisms](./update-firmware-and-os-on-qualcomm-linux-using-capsule-and-os-tree-mechanisms).