Because it happened few time I would like to write a bit more detailed info how I did crashed HAMMER with mount -t smbfs command.
First, DF was installed on eeepc with 20 GB ssd, named ad2 (4GB) and ad3 (16GB). With installer I had to put DF on smaller disc (faster) and after successful installation, I then added bigger disc with “hammer volume-add /dev/ad3s0 /" → is that correct? I had no problem using HAMMER on such a small disk (disabled auto hammer cleanup) until I wanted to connect my eeepc to other computer, mini “server" running PC-BSD. I did install and configured samba and had connection with PC-BSD, but only one way → using PC-BSD or with smbclient (with this command I could get&put files from PC-BSD using my eeepc). Now everytime I tried to mount folder on PC-BSD (or Windows runnig computer) with mount -t smbfs it failed and crashed (once using DF on eeepc internal ssd and once using DF on a big 200GB external usb-hdd). After such a crash I could boot into my root or user account but root had no apps (not even cli / user had links/nano) available – both failed to start X. There was data on disc but I could not “get" to that data as it was not there. With “mount" all entries were normal (checked it on freshly installed DF setup). Folder /home/user had no sign of any data so did /mysnapshot or /var/hammer but with df -h I did get the same info as before crash. Got the same result when mounted those discs using DF live-cd. So this is what happened – hope it helps developers. I now know, that mounting smbfs is a HAMMER killer :) Have no, fresh installation of DF (now mounted ad3 as /home not / → maybe this is a better idea, don't know). For sure, I'll not try to mount samaba share with eeepc :) I do like HAMMER as a file system & going to test it on eeepc with small ssd (should I use noatime option?).