missing /home after change partitions size
xlla opened this issue · 8 comments
in file meta-intel-edison/meta-intel-edison-bsp/recipes-bsp/u-boot/files/edison.env
rootfs, size=1536MiB
update, size=768MiB
in file meta-intel-edison/meta-intel-edison-distro/recipes-core/images/edison-image-minimal.bb
IMAGE_ROOTFS_SIZE = "1048576"
after flash firmware, /home was missing.
Poky (Yocto Project Reference Distro) 2.7.2 edison ttyS2 edison login: root Last login: Sat Feb 15 22:45:35 UTC 2020 on ttyS2 No directory, logging in with HOME=/ root@edison:/# ls bin boot dev etc factory home lib lost+found media mnt opt proc run sbin sketch sys tmp usr var root@edison:/# df -h Filesystem Size Used Avail Use% Mounted on none 474M 4.0K 474M 1% /dev /dev/mmcblk0p8 928M 602M 260M 70% / tmpfs 478M 0 478M 0% /dev/shm tmpfs 478M 604K 478M 1% /run tmpfs 478M 0 478M 0% /sys/fs/cgroup tmpfs 478M 52K 478M 1% /tmp tmpfs 478M 0 478M 0% /var/volatile /dev/mmcblk1p1 30G 16G 13G 55% /media/sdcard /dev/mmcblk0p5 1003K 19K 913K 3% /factory
why mmcblk0p8 is still size 928M instead of 1536M?
should IMAGE_ROOTFS_SIZE = (rootfs size in edison.env) * 1024 ?
to use OTA, should IMAGE_ROOTFS_SIZE <= (update size in edison.env) ?
Normally, the home partition is not touched during flash, so your files there persist. Looks like something now went wrong during flash destroying the home partition.
Then on first boot partitions are resized (try partx /dev/mmc0blkp8) . And then AFAIU the filesystem is resized: https://github.com/edison-fw/meta-intel-edison/blob/master/meta-intel-edison-distro/recipes-core/resize-rootfs/resize-rootfs.bb.
Maybe you need to manually fix?
I am afraid I will lost data while flash firmware so I keep all my data on sdcard.
In fact I do not need home partition in emmc, so does OTA partition, can I alloc all space to rootfs?
after update os, rerun make image, the /home is back!
how to simple update kernel inside edison, can I create some kernel.deb , then in edison execute "apt upgrade kernel" ?
each time when I make some tiny change to kernel module, I have to pack whole images and flashall,
maybe emmc would wear out.
I prepared ota partition as simple fat partition and put kernel there, and rootfs on usb (fast writing) or sdhc (slower), then boot run usbboot or run edsboot.
This works best if you have working system on emmc (that you don't touch so it won't break) andyou can use that to scp the kernel to the ota partition.
Normally, the home partition is not touched during flash
so the home partition just hold it's original size(1.3GB), and won't change even I have adjust size of rootfs & update in edison.env?
I prepared ota partition as simple fat partition and put kernel there
In sumo branch built, I have put a kernel in there, and forgot to update it when I flash new warrior images.
Now I have put warrior kernel in OTA, and boot successful from sdcard!
root@edison:~# df -h Filesystem Size Used Avail Use% Mounted on none 474M 4.0K 474M 1% /dev /dev/mmcblk1p1 28G 2.5G 24G 10% / tmpfs 478M 0 478M 0% /dev/shm tmpfs 478M 620K 478M 1% /run tmpfs 478M 0 478M 0% /sys/fs/cgroup tmpfs 478M 4.0K 478M 1% /tmp tmpfs 478M 0 478M 0% /var/volatile /dev/mmcblk0p10 1.3G 15M 1.3G 2% /home /dev/mmcblk0p5 1003K 19K 913K 3% /factory tmpfs 96M 0 96M 0% /run/user/0
I wonder if I can shrink partition mmcblk0p10 and leave more space for "rootfs / update".
If the end of ota partition overlaps home, home will break. But if you increase rootfs and decrease ota by the same there will be no problem.
For Zeus I am working to replace rootfs / ota/ home by a single btrfs partition, with subvolumes @boot, @, @home, @ota. This way all free space is available to all subvolumes.
This way all free space is available to all subvolumes.
It is great!
Eventually, the rootfs size is identical to edison.env definition.
root@edison:~# partx /dev/mmcblk0p8 NR START END SECTORS SIZE NAME UUID 8 131072 3276799 3145728 1.5G rootfs 04ea6535-c373-4140-ac7a-6f6e99ed7da4 root@edison:~# systemctl start resize-rootfs.service [24631.865037] resize2fs[886]: resize2fs 1.44.5 (15-Dec-2018) [24632.392594] resize2fs[886]: Resizing the filesystem on /dev/disk/by-partlabel/rootfs to 393216 (4k) blocks. [24632.393354] resize2fs[886]: The filesystem on /dev/disk/by-partlabel/rootfs is now 393216 (4k) blocks long. [24632.489107] systemctl[889]: Removed /etc/systemd/system/default.target.wants/resize-rootfs.service. root@edison:~# df -h Filesystem Size Used Avail Use% Mounted on none 474M 4.0K 474M 1% /dev /dev/mmcblk0p8 1.4G 992M 325M 76% / tmpfs 478M 0 478M 0% /dev/shm tmpfs 478M 620K 478M 1% /run tmpfs 478M 0 478M 0% /sys/fs/cgroup tmpfs 478M 4.0K 478M 1% /tmp tmpfs 478M 0 478M 0% /var/volatile /dev/mmcblk1p1 28G 2.6G 24G 10% /media/sdcard /dev/mmcblk0p5 1003K 19K 913K 3% /factory /dev/mmcblk0p10 1.3G 15M 1.3G 2% /home tmpfs 96M 0 96M 0% /run/user/0