Here are some News on the Topic.
I double checked, that I used the correct files.
Before the update I had a self compiled version running, as I the update failed I made a clean install of LE 7.0.2. Just in case I messed something up.
So I guess the NAND should be nearly empty.
I let the box alone for a while (about 15 or 20 minutes). As i returned I got a message on the screen stating "unable to mount /dev/data"
And giving me a debug shell.
Manually mounting /dev/data to /storage fails with "invalid argument"
I gathered some hopefully usefull output.
Update:
I made another clean install of 7.0.2 to gather "df -h" output, busybox does not support "-h".
LibreELEC:~ # df -h
Filesystem Size Used Available Use% Mounted on
devtmpfs 426.4M 0 426.4M 0% /dev
/dev/ubi0_0 200.5M 116.6M 79.2M 60% /flash
/dev/data 2.9G 9.2M 2.9G 0% /storage
/dev/loop0 115.9M 115.9M 0 100% /
tmpfs 428.3M 0 428.3M 0% /dev/shm
tmpfs 428.3M 6.3M 422.0M 1% /run
tmpfs 428.3M 0 428.3M 0% /sys/fs/cgroup
tmpfs 428.3M 0 428.3M 0% /tmp
tmpfs 428.3M 240.0K 428.1M 0% /var
/dev/mmcblk0p1 511.0M 241.9M 269.1M 47% /var/media/mmcblk0p1-mmc-SD8GB_0x0025dcc5
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