mksnap_ffs, snapshot issues, again

I have 900G array on a promise sx6000 controller

This is freshly formatted filesystem (newfs -L export -O 2 -U -g 48000 -i 2048 -m 0 -o space /dev/pst0s2d)

# df -i /export
/dev/pst0s2d 778742004 216194 778525810     0%       2 445159292    0%   /export

# mount | grep export
/dev/pst0s2d on /export (ufs, local, soft-updates)

let's try to create a snapshot of empty filesystem

# cd /export
# mksnap_ffs /export aaa.snap

... after 30 minutes ... snapshot was not created (!!! On a empty filesystem !!!)... Ok, long snapshot creation would be fine if it would not hang all processes, which would like to do something on /export (ls /export for example.). Filesystem cannot be unmounted. mksnap_ffs process cannot be killed. Reboot and foreground fsck helps.

This is 5.1-RELEASE (without patches, with custom kernel -> just picked up generic kernel and removed uneeded stuff.)....

Any ideas, why is this happening? As i mentioned before, this prevents background fsck to make his job done (machine hangs.)


I would really like to solve this issue....

Brane