ZFS突然死の原因はやはりZFSのバグだった?

ZFS突然死の原因はやはりZFSのバグだった?/最初は、他の ZFS マシンは動いていたのでマシン固有の問題だと思っていたが/実際、メインルータは連続運転中/Partition:

3.1.4 Partition:

root@kx:~ # gpart show da0
=>        40  3906249648  da0  GPT  (1.8T)
          40        1024    1  freebsd-boot  (512K)
        1064    33554432    2  freebsd-swap  (16G)
    33555496  3145728000    3  freebsd-zfs  (1.5T)
  3179283496   726966184    4  freebsd-ufs  (347G)
  3906249680           8       - free -  (4.0K)

root@kx:~ # 
-Filesystem:
root@kx:~ # zpool status
  pool: zroot
 state: ONLINE
status: Some supported features are not enabled on the pool. The \
    pool can
        still be used, but some features are unavailable.
action: Enable all features using 'zpool upgrade'. Once this is \
    done,
the pool may no longer be accessible by software that does not \
    support
        the features. See zpool-features(7) for details.
  scan: none requested
config:

        NAME        STATE     READ WRITE CKSUM
        zroot       ONLINE       0     0     0
          da0p3     ONLINE       0     0     0

errors: No known data errors
root@kx:~ #