Hang when importing pool

[Karli Sjöberg]

Hi,

I´m really struggling with this. I have had a pool with imported filesystems from a Solaris system that had dedup activated. Then, when the time came to erase them, it just stalled. When rebooting, it stalled again at mounting filesystems, and since then, I´ve installed two USB drives to act as root pool with FreeBSD-9.0-RELEASE so that I could import the original pool in recovery, but it always stalls after a couple of hours. Looking at top, I could see that the 16GB RAM was maxed out, so I have heavily tuned down kmem, arc, etc:

vm.kmem_size_max="512M"
vm.kmem_size="384M"
vfs.zfs.arc_max="256M"

And then I tried importing again, but with the same result; RAM reaches 16G Wired, 0B Free and some swap allocated as well, and then it stalls. So I tried updating, so currently it´s at FreeBSD 9.1-BETA1 #0: Fri Jul 13 22:36:05 CEST 2012, but still no go, it still stalls when I try importing, even like:

# zpool import -f -F -m pool1

In the link is a screenshot of CTRL+T after it stalled the last time.
http://i46.tinypic.com/jhdgrq.png

There is about 4TB in there that I really need. Please help, I´m out of ideas, and stupid enough not to have gotten it backed up yet.


Best Regards
-------------------------------------------------------------------------------
Karli Sjöberg
Swedish University of Agricultural Sciences
Box 7079 (Visiting Address Kronåsvägen 8)
S-750 07 Uppsala, Sweden
Phone:  +46-(0)18-67 15 66
karli.sjoberg at slu.se<mailto:karli.sjoberg at adm.slu.se>