# Mender-Convert specific RootFS size **URL:** \ **Category:** General Discussions\ **Tags:** raspberry-pi-3, raspbian, mender-convert\ **Created:** [April 1, 2020, 3:06pm UTC](https://hub.mender.io/t/mender-convert-specific-rootfs-size/1732 "2020-04-01T15:06:32Z")\ **Posts on this page:** 1\ **Showing post:** 5
**Author:** ![mirzak](https://yyz2.discourse-cdn.com/flex036/user_avatar/hub.mender.io/mirzak/32/2056_2.png) [@mirzak](https://hub.mender.io/u/mirzak)\ **Post date:** [April 1, 2020, 5:36pm UTC](https://hub.mender.io/t/mender-convert-specific-rootfs-size/1732/5 "2020-04-01T17:36:36Z")
> Is it possible to fix the RootFS size to 8192 MB (8GB) ? Yes, increase the `MENDER_DATA_PART_SIZE_MB`. Below should explain why (copied from [Raspberry Pi 3 Model B/B+ Raspbian - #23 by eystein](https://hub.mender.io/t/raspberry-pi-3-model-b-b-raspbian/140/23)) The SD card layout will be the following using the default arguments (this with the default 8GB size): | Part | Type | Purpose | Size | Configure size | | --- | --- | --- | --- | --- | | mmcblk0p1 | vfat | Store the bootloader | 44MB | `MENDER_BOOT_PART_SIZE_MB` | | mmcblk0p2 | ext4 | Store the root file system and kernel (active) | 3908MB | `MENDER_STORAGE_TOTAL_SIZE_MB`[1](https://hub.mender.io/t/raspberry-pi-3-model-b-b-raspbian/140/23#footnote1) | | mmcblk0p3 | ext4 | Store the root file system and kernel (inactive) | 3908MB | `MENDER_STORAGE_TOTAL_SIZE_MB`[1](https://hub.mender.io/t/raspberry-pi-3-model-b-b-raspbian/140/23#footnote1) | | mmcblk0p4 | ext4 | Store persistent data, preserved during Mender updates. | 128MB | `MENDER_DATA_PART_SIZE_MB`[2](https://hub.mender.io/t/raspberry-pi-3-model-b-b-raspbian/140/23#footnote2) | 1. The rootfs partition size is calculated using the following formula: ```auto (storage-total-size-mb - data-part-size-mb - boot-part-size) / 2 ``` --- _[View the full topic](https://hub.mender.io/t/mender-convert-specific-rootfs-size/1732)._