I've installed the latest version 2.6.3-1.
I see the LVM section has been removed. Probably a good reason, but just mentioning it.
In my system i've 2 data disk of 4TB. Tried to play with 1 disk a little bit, but i could not format this disk to 4TB (GPT)
Not displaying any eerrors
Also umounting of shares did not work, because they were probably in use. You can not force an umount
Further were can you see a kind of log what is happened