Comment # 3 on bug 1189791 from Berthold Gunreben

Maybe I should add a little so that it is easier to reproduce. So, what I did:

1. create btrfs and mount to /srv (actually 4 devices, but I believe this will
not be relevant)
1.1 put data on that disk, so that it is something like 90% full
2. online add extra devices with btrfs device add
2.1 use dirm to add full pack minidisk (without cylinder 0) like
  dirm for <guest> amd 104 3390 autog 65519 pool1 mr
2.2 vmcp link <host> 101 101 mr
2.3 use yast to activate and format disk then create raw partition
2.4 adddisk with btrfs device add
2.5 rebalance btrfs
3. add hyperpavalias device like in first description, also online as maint
with
  for <guest> cmd define hyperpavalias 01c0 for base 0100
4. activate hyperpavalias device with chzdev -e 01c0
5. add more disks like in 2 with rebalance
6. this is now a little complicate: 
6.1 I had a kubic docker registry on /srv and mirrored registry also within
that filesystem
6.2 the errors showed up when I filled the registry with the local copy