What sort of file system is this and how to mount it?

[Chris Whitehouse]

Hi

I have a 120gb SATA disk with the following>

eco# fdisk ad4
******* Working on device /dev/ad4 *******
parameters extracted from in-core disklabel are:
cylinders=232581 heads=16 sectors/track=63 (1008 blks/cyl)

Figures below won't work with BIOS for partitions not in cyl 1
parameters to be used for BIOS calculations are:
cylinders=232581 heads=16 sectors/track=63 (1008 blks/cyl)

Media sector size is 512
Warning: BIOS sector numbering starts with sector 1
Information from DOS bootblock is:
The data for partition 1 is:
sysid 238 (0xee),(EFI GPT)
     start 1, size 234441647 (114473 Meg), flag 0
         beg: cyl 1023/ head 254/ sector 63;
         end: cyl 1023/ head 254/ sector 63
The data for partition 2 is:
<UNUSED>
The data for partition 3 is:
<UNUSED>
The data for partition 4 is:
<UNUSED>
eco# gpart show ad4
=>       34  234441581  ad4  GPT  (112G)
          34          6       - free -  (3.0K)
          40     409600    1  efi  (200M)
      409640  233769824    2  !48465300-0000-11aa-aa11-00306543ecac  (111G)
   234179464     262151       - free -  (128M)
eco# ls /dev/ad4*
/dev/ad4        /dev/ad4p1      /dev/ad4p2
eco# mount_msdosfs /dev/ad4p1 /mnt
eco# find /mnt
/mnt
/mnt/EFI
/mnt/EFI/APPLE
/mnt/EFI/APPLE/EXTENSIONS
/mnt/EFI/APPLE/EXTENSIONS/Firmware.scap
eco# umount /mnt

That makes me think ad4p2 is HFS or HFS+ so I installed hfsexplorer 
(http://hem.bredband.net/catacombae/hfsx.html) and it tells me ad4p2 is 
an invalid HFS type.

So try a few other things
eco# mount /dev/ad4p2 /mnt
mount: /dev/ad4p2 : Invalid argument
eco# mount_msdosfs /dev/ad4p2 /mnt
mount_msdosfs: /dev/ad4p2: Invalid argument
eco# mount -t ext2fs /dev/ad4p2 /mnt
mount: /dev/ad4p2 : Invalid argument

Any ideas?

FreeBSD eco.config 8.0-RELEASE-p1 FreeBSD 8.0-RELEASE-p1 #0: Fri Dec 11 
14:40:08 GMT 2009     root at eco.config:/usr/obj/usr/src/sys/GENERIC  i386

thanks

Chris