Hi!
I purchased a Raspberry Pi 4 and followed the instructions to get OpenWRT running on it and it does pretty well. I also purchased a 64 GB sd card so that I'd have plenty of space. Of course, OpenWRT only uses a small part of this so I went ahead and looked for information on how to resize the partition. And it turns out the available information I found is quite dated, but I tried it anyway. Here's what I did. On OpenWRT with a terminal:
- fdisk /dev/mmcblk0
- delete partition /dev/mmcblk0p2
- create it again, making sure the start sector is the same as before
- don't delete the squashfs signature
- write changes
- reboot
Now OpenWRT boots fine. I'm using it right now. The final step is to actually resize the file system but that's where I'm stuck:
root@OpenWrt:~# resize2fs /dev/mmcblk0p2
resize2fs 1.44.5 (15-Dec-2018)
resize2fs: Resource busy while trying to open /dev/mmcblk0p2
Couldn't find valid filesystem superblock.
root@OpenWrt:~# e2fsck -f /dev/mmcblk0p2
e2fsck 1.44.5 (15-Dec-2018)
/dev/mmcblk0p2 is in use.
e2fsck: Cannot continue, aborting.
root@OpenWrt:~# resize.f2fs /dev/mmcblk0p2
Error: In use by the system!
I also tried to do the resize2fs stuff on my Fedora system but it still fails:
[jerther@localhost ~]$ sudo resize.f2fs /dev/mmcblk0p2
Info: Segments per section = 1
Info: Sections per zone = 1
Info: sector size = 512
Info: total sectors = 124895232 (60984 MB)
Can't find a valid F2FS superblock at 0x0
Invalid SB CRC offset: 1640914489
Can't find a valid F2FS superblock at 0x1
[jerther@localhost ~]$ sudo resize2fs /dev/mmcblk0p2
resize2fs 1.45.3 (14-Jul-2019)
resize2fs: Bad magic number in super-block while trying to open /dev/mmcblk0p2
Couldn't find valid filesystem superblock.
I made sure the new partition started at the same location. In fact, here's a comparison:
Before:
Device Boot Start End Sectors Size Id Type
/dev/mmcblk0p1 * 8192 139263 131072 64M c W95 FAT32 (LBA)
/dev/mmcblk0p2 147456 360447 212992 104M 83 Linux
After:
Device Boot Start End Sectors Size Id Type
/dev/mmcblk0p1 * 8192 139263 131072 64M c W95 FAT32 (LBA)
/dev/mmcblk0p2 147456 125042687 124895232 59.6G 83 Linux
And of course, no real change to the space available:
root@OpenWrt:~# df -h
Filesystem Size Used Available Use% Mounted on
/dev/root 3.5M 3.5M 0 100% /rom
tmpfs 931.7M 280.0K 931.4M 0% /tmp
/dev/loop0 98.7M 86.0M 12.7M 87% /overlay
overlayfs:/overlay 98.7M 86.0M 12.7M 87% /
/dev/mmcblk0p1 63.9M 15.7M 48.1M 25% /boot
tmpfs 512.0K 0 512.0K 0% /dev
So I'm really lost here. I've looked everywhere Google could lead me. Any clue?