MISC-TN-031: Using gparted for modifying an SD card
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| 2024/07/02 | DESK-MX-L 4.x.x release | ||
Contents
Introduction[edit | edit source]
The size of rootfs created by Yocto may be too small to install custom applications. So we need to extend the root file system partition. To do that we use, for example, MVM of DESK-MX6UL-L-4.0.0-MVM and install gparted.
Extend rootfs[edit | edit source]
On target we have the following partition and free space
root@desk-mx6ul-axelulite:~# fdisk -l /dev/mmcblk0 Disk /dev/mmcblk0: 14.84 GiB, 15931539456 bytes, 31116288 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disklabel type: dos Disk identifier: 0xfe9755a5 Device Boot Start End Sectors Size Id Type /dev/mmcblk0p1 * 8192 58385 50194 24.5M c W95 FAT32 (LBA) /dev/mmcblk0p2 65536 9266947 9201412 4.4G 83 Linux root@desk-mx6ul-axelulite:~# root@desk-mx6ul-axelulite:~# df -h Filesystem Size Used Avail Use% Mounted on /dev/root 4.2G 1011M 3.0G 26% / devtmpfs 118M 0 118M 0% /dev tmpfs 119M 0 119M 0% /dev/shm tmpfs 48M 8.7M 39M 19% /run tmpfs 4.0M 0 4.0M 0% /sys/fs/cgroup tmpfs 119M 0 119M 0% /tmp tmpfs 119M 120K 119M 1% /var/volatile root@desk-mx6ul-axelulite:~#
To increase rootfs size you need to perform the command below.
First of all you need to connect your microSD with MVM, as show image below. In this case we use microSD created for desk-mx6ul-l-4.1.0.
With fdisk command we can check size of partition about microSD created with Yocto
dvdk@vagrant:~$ sudo fdisk -l /dev/sdb Disk /dev/sdb: 14.86 GiB, 15931539456 bytes, 31116288 sectors Disk model: Storage Device Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disklabel type: dos Disk identifier: 0xfe9755a5 Device Boot Start End Sectors Size Id Type /dev/sdb1 * 8192 58385 50194 24.5M c W95 FAT32 (LBA) /dev/sdb2 65536 9266947 9201412 4.4G 83 Linux
We have that first partition has 24.5MB of size, while second partition has 4.4GB of size. We want increase size of rootfs until it reach the max size avaible of microSD. To do this we use gparted.
After run gparted we need to choose the correct disk to resize
In this case we can see that there are 10GB of free space not allocated. This free space can be allocated on rootfs. To do this we need to umount rootfs partition as shown in the image below
To resize partition right click on rootfs partition, then click Resize/Move.
Move rootfs partition to the end of storage, right click on rootfs partition, then click Resize/Move. The following window will be open. In this case drag the square and move it to the right end. To confirm new partition click on Resize/Move
After this changes we have the following window
To Apply changes you need to click check mark icon and follow the step below
After resize of rootfs partition with gparted we check that chenges was correctly applied with fdisk
dvdk@vagrant:~$ sudo fdisk -l /dev/sdb Disk /dev/sdb: 14.86 GiB, 15931539456 bytes, 31116288 sectors Disk model: Storage Device Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disklabel type: dos Disk identifier: 0xfe9755a5 Device Boot Start End Sectors Size Id Type /dev/sdb1 * 8192 58385 50194 24.5M c W95 FAT32 (LBA) /dev/sdb2 65536 31116287 31050752 14.8G 83 Linux dvdk@vagrant:~$
On target we have the following partition and free space
root@desk-mx6ul-axelulite:~# fdisk -l /dev/mmcblk0 Disk /dev/mmcblk0: 14.84 GiB, 15931539456 bytes, 31116288 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disklabel type: dos Disk identifier: 0xfe9755a5 Device Boot Start End Sectors Size Id Type /dev/mmcblk0p1 * 8192 58385 50194 24.5M c W95 FAT32 (LBA) /dev/mmcblk0p2 65536 31116287 31050752 14.8G 83 Linux root@desk-mx6ul-axelulite:~# df -h Filesystem Size Used Avail Use% Mounted on /dev/root 15G 1000M 13G 8% / devtmpfs 118M 0 118M 0% /dev tmpfs 119M 0 119M 0% /dev/shm tmpfs 48M 8.7M 39M 19% /run tmpfs 4.0M 0 4.0M 0% /sys/fs/cgroup tmpfs 119M 0 119M 0% /tmp tmpfs 119M 120K 119M 1% /var/volatile root@desk-mx6ul-axelulite:~#
