LaCie BigDisk Extreme connected after booting PC-BSD

$ date ; time ; freebsd-version ; uname -a
28 May 2016 at 10:03:08 BST
11.0-CURRENTMAY2016
FreeBSD hpelitebook850g2-pcbsd.university.brighton.ac.uk 11.0-CURRENTMAY2016 FreeBSD 11.0-CURRENTMAY2016 #19 5bab0d2(master): Fri May  6 17:56:25 UTC 2016     root@devastator:/usr/obj/usr/src/sys/GENERIC  amd64
$ dmesg | tail -n 10
ugen0.6: <LaCie Group.SA> at usbus0
umass0: <LaCie Group.SA BigDisk Extreme, class 0/0, rev 2.00/1.18, addr 5> on usbus0
umass0:  SCSI over Bulk-Only; quirks = 0xc100
umass0:1:0: Attached to scbus1
da0 at umass-sim0 bus 0 scbus1 target 0 lun 0
da0: <LaCie BigDisk Extreme > Fixed Direct Access SPC-2 SCSI device
da0: Serial Number AC577E850B0B
da0: 40.000MB/s transfers
da0: 953880MB (1953546240 512 byte sectors)
da0: quirks=0x2<NO_6_BYTE>
$ gpart show
=>        63  1953525105  ada0  MBR  (932G)
          63        1985        - free -  (993K)
        2048  1953523112     1  freebsd  [active]  (932G)
  1953525160           8        - free -  (4.0K)

=>         0  1953523112  ada0s1  BSD  (932G)
           0          16          - free -  (8.0K)
          16  1945104384       1  freebsd-zfs  (927G)
  1945104400     8388608       2  freebsd-swap  (4.0G)
  1953493008       30104          - free -  (15M)

=>        63  1953546177  da0  MBR  (932G)
          63        1985       - free -  (993K)
        2048  1953544184    1  freebsd  [active]  (932G)
  1953546232           8       - free -  (4.0K)

=>         0  1953544184  da0s1  BSD  (932G)
           0  1949231104      1  freebsd-zfs  (929G)
  1949231104     4096000      2  freebsd-swap  (2.0G)
  1953327104      217080         - free -  (106M)

$