5.10.209_Forlinx_Desktop22.04_Root Partition Expansion When Booting with TF Card (Modifying File System Partitions after System Boot)
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Revision History
Date |
Manual Version |
Revision History |
|---|---|---|
4/17/2025 |
V1.0 |
Description
This document mainly introduces the method of directly deleting the oem and userdata partitions on the OK3588 development board and expanding them to the root partition. There is no need to modify the source code, re - compile and flash.
Modification Method
When using a 64G TF card for card boot, it is found that the actual root directory is only 15G, and the entire space of the TF card is not fully utilized. Data still needs to be stored in the userdata. Therefore, the following partition expansion methods are provided.
Note: Operations need to be performed on the debug serial port or on the development board as the root user.
Linux 5.10.66 has no parted command
View partitions in parted:
root@ok3588:~# parted /dev/mmcblk1
GNU Parted 3.4
Using /dev/mmcblk1
Welcome to GNU Parted! Type 'help' to view a list of commands.
(parted) print // View the partition
Model: SD SD64G (sd/mmc)
Disk /dev/mmcblk1: 63.9GB
Sector size (logical/physical): 512B/512B
Partition Table: gpt
Disk Flags:
Number Start End Size File system Name Flags
1 8389kB 12.6MB 4194kB uboot
2 12.6MB 16.8MB 4194kB misc
3 16.8MB 83.9MB 67.1MB boot
4 83.9MB 218MB 134MB recovery
5 218MB 252MB 33.6MB backup
6 252MB 15.3GB 15.0GB ext4 rootfs
7 15.3GB 15.4GB 134MB ext4 oem
8 15.4GB 63.9GB 48.4GB ext4 userdata
Delete partitions 7 and 8:
(parted) rm 8
Warning: Partition /dev/mmcblk1p8 is being used. Are you sure you want to continue?
Yes/No? yes
Error: Partition(s) 8 on /dev/mmcblk1 have been written, but we have been unable to inform the kernel of the change, probably because it/they
are in use. As a result, the old partition(s) will remain in use. You should reboot now before making further changes.
Ignore/Cancel? ignore
(parted) rm 7
Warning: Partition /dev/mmcblk1p7 is being used. Are you sure you want to continue?
Yes/No? yes
Error: Partition(s) 7, 8 on /dev/mmcblk1 have been written, but we have been unable to inform the kernel of the change, probably because
it/they are in use. As a result, the old partition(s) will remain in use. You should reboot now before making further changes.
Ignore/Cancel? ignore
Expand partition 6:
(parted) resizepart 6
Warning: Partition /dev/mmcblk1p6 is being used. Are you sure you want to continue?
Yes/No? yes
End? [15.3GB]? 100%
Error: Error informing the kernel about modifications to partition /dev/mmcblk1p6 -- Device or resource busy. This means Linux won't know
about any changes you made to /dev/mmcblk1p6 until you reboot -- so you shouldn't mount it or use it in any way before rebooting.
Ignore/Cancel? ignore
Error: Partition(s) 7, 8 on /dev/mmcblk1 have been written, but we have been unable to inform the kernel of the change, probably because
it/they are in use. As a result, the old partition(s) will remain in use. You should reboot now before making further changes.
Ignore/Cancel? ignore
View partitions again:
(parted) print
Model: SD SD64G (sd/mmc)
Disk /dev/mmcblk1: 63.9GB
Sector size (logical/physical): 512B/512B
Partition Table: gpt
Disk Flags:
Number Start End Size File system Name Flags
1 8389kB 12.6MB 4194kB uboot
2 12.6MB 16.8MB 4194kB misc
3 16.8MB 83.9MB 67.1MB boot
4 83.9MB 218MB 134MB recovery
5 218MB 252MB 33.6MB backup
6 252MB 63.9GB 63.6GB ext4 rootfs
It can be seen that partition 6 has been expanded. Press ctrl + d to exit parted.
Modify /etc/fstab:
root@ok3588:~# vi /etc/fstab
Block the following two commands:
/dev/mmcblk0p7 /oem ext4 defaults 0 0
/dev/mmcblk0p8 /userdata ext4 defaults 0 0
Linux block:
PARTLABEL=oem /oem ext4 defaults 0 2
PARTLABEL=userdata /userdata ext4 defaults 0 2
Note: If the above two lines are not commented out in Ubuntu before restarting, it will cause the system to fail to boot. At this time, you can use Linux to boot, then read the contents of the TF boot card, and thus operate the Ubuntu file system.
root@ok3588:~# cd /media/sdcard2/etc/ // or/mnt/sdcard/etc/
root@ok3588:/media/sdcard2/etc# vi fstab
Block：
/dev/mmcblk0p7 /oem ext4 defaults 0 0
/dev/mmcblk0p8 /userdata ext4 defaults 0 0
root@ok3588:/media/sdcard2/etc# sync
Save and restart:
Expand partition 6:
root@ok3588:~# resize2fs /dev/mmcblk1p6
resize2fs 1.46.5 (30-Dec-2021)
Filesystem at /dev/mmcblk1p6 is mounted on /run/media/mmcblk1p6; on-line resizing required
old_desc_blocks = 2, new_desc_blocks = 8
The filesystem on /dev/mmcblk1p6 is now 15530491 (4k) blocks long.
View partitions:
root@ok3588:~# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/root 59G 5.8G 50G 11% /
tmpfs 1.9G 0 1.9G 0% /dev/shm
tmpfs 768M 2.6M 766M 1% /run
tmpfs 5.0M 4.0K 5.0M 1% /run/lock
tmpfs 1.9G 12K 1.9G 1% /tmp
tmpfs 384M 84K 384M 1% /run/user/1000
tmpfs 384M 56K 384M 1% /run/user/0