There is a bug in committing metadata --- you can't commit metadata if there is any copying or zeroing in flight. The problem is that in this case, the block you are copying to is already allocated, but it is not linked anywhere in the metadata. So it creates lost blocks in case of crash. Mikulas -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
