Strange "hard link" after fsck

[BERTRAND Joël <joel.bertrand%systella.fr@localhost>]

	Hello,

	One of my server runs netbsd-7 (very recent CVS tree). This server has 
paniced as I have tried to use altqd on an OpenVPN link. I have done 
fsck in single user mode on all slices and fsck has reconnected a 
directory in /usr/lost+found. I don't understand how delete this 
directory, it seems to be a hard link on /root but /root and /usr are 
not on the same slice !...

legendrelegendre# mount
/dev/ld0a on / type ffs (log, local)
/dev/ld0f on /var type ffs (log, local)
/dev/ld0e on /usr type ffs (log, local)
/dev/ld0g on /home type ffs (log, NFS exported, local)
kernfs on /kern type kernfs (local)
ptyfs on /dev/pts type ptyfs (local)
procfs on /proc type procfs (local)
tmpfs on /var/shm type tmpfs (local)
# df -h
Filesystem         Size       Used      Avail %Cap Mounted on
/dev/ld0a           31G        21G       8.4G  71% /
/dev/ld0f           31G       644M        29G   2% /var
/dev/ld0e           62G        18G        41G  30% /usr
/dev/ld0g          775G       265G       471G  36% /home
kernfs             1.0K       1.0K         0B 100% /kern
ptyfs              1.0K       1.0K         0B 100% /dev/pts
procfs             4.0K       4.0K         0B 100% /proc
tmpfs              4.0G        24K       4.0G   0% /var/shm
legendre# cd /usr
legendre# ls -l
total 82
drwxr-xr-x   8 root  wheel    512 Jan  5 12:20 X11R7
drwxr-xr-x   2 root  wheel   8192 Jan 17 17:59 bin
drwxr-xr-x   3 root  wheel   1024 Jan 17 17:57 games
drwxr-xr-x  61 root  wheel   5120 Jan 17 17:55 include
drwxr-xr-x   7 root  wheel  31232 Jan 17 17:56 lib
drwxr-xr-x   6 root  wheel    512 Jan  5 12:20 libdata
drwxr-xr-x   5 root  wheel   1536 Jan 17 17:59 libexec
drwxr-xr-x   6 root  wheel    512 Jan  6 12:49 local
drwx-----T   3 root  wheel    512 Jan 17 17:35 lost+found
drwxr-xr-x   2 root  wheel    512 Jan 16 21:21 mdec
drwxr-xr-x  24 root  wheel    512 Jan 17 17:45 obj
drwxr-xr-x  18 root  wheel    512 Jan 17 17:26 pkg
drwxr-xr-x  88 root  wheel   2048 Jan 18 00:11 pkgsrc
drwxr-xr-x   2 root  wheel   6144 Jan 17 17:57 sbin
drwxr-xr-x  33 root  wheel   1024 Jan  5 12:20 share
drwxr-xr-x  29 root  wheel   1024 Jan 18 00:13 src
drwxr-xr-x  24 root  wheel    512 Jan 16 21:23 tests
drwxr-xr-x  12 root  wheel    512 Jan  6 17:09 tools
drwxr-xr-x   6 root  wheel    512 Jan 16 19:17 xsrc
legendre# cd lost+found/
legendre# ls -l
total 2
drwxr-xr-x  3 root  wheel  512 Jul 18  2015 #3470097
legendre# pwd
/usr/lost+found
legendre# cd #3470097/
legendre# pwd
/root
legendre#

	Of course, I have restarted a new fsck on /usr in single user mode 
without any result.

	I don't understand how fsck can reconnect a directory that should be on 
another slice.

	Any idea ?

	Best regards,

	JKB