ZFS Need help to recover data from overriden ZFS pool

[Joe Black]

Hello everyone,

this is my unfortunate adventure with FreeNAS and ZFS pool.

1. I have two WD Caviar RED NAS hard drives - each 2.7 TB. Both were used as NTFS bacup drives combined with iSCSI, but I decided to switch to SMB and ZFS file system imposed by FreeNAS.
2. I started with one disk (called ada0) - one ZFS partition - containing all of the data ~2TB. Pool_SMB was the name of the pool is this case. Everything was working well.
3. Then I wanted to add the second one (ada1) using FreeNAS web interface. Here we have stupid steps I made.
- simultaneously to running Pool_SMB (containing only ada0) I tried to create another pool: Pool_SMB_All (containing ada0 and ada1)
- then I think that I deleted Pool_SMB
- Pool_SMB_All was ONLINE, but I couldn't see any data from the first disk
- so I deleted Pool_SMB_All and created once again Pool_SMB with ada0.

Therefore, pool status of Pool_SMB is OK, but I still can't recover the data.
I believe it is still possible to get it somehow (like with recovery software for FAT/NTFS). I really hope so.

So far, I've made copy of ada0 using dd.
Also, I've used latest MFSBSD iso to get some information about both disks:

--- ada0 ---

 zdb -l /dev/ada

--------------------------------------------
LABEL 0
--------------------------------------------
failed to unpack label 0
--------------------------------------------
LABEL 1
--------------------------------------------
    version: 5000
    name: 'Pool_SMB'
    state: 0
    txg: 579
    pool_guid: 14218318371378138485
    hostid: 2094371779
    hostname: 'mfsbsd'
    top_guid: 10867942708007115030
    guid: 10867942708007115030
    vdev_children: 1
    vdev_tree:
        type: 'disk'
        id: 0
        guid: 10867942708007115030
        path: '/dev/ada0'
        phys_path: '/dev/ada0'
        whole_disk: 1
        metaslab_array: 34
        metaslab_shift: 34
        ashift: 12
        asize: 3000588042240
        is_log: 0
        DTL: 42
        create_txg: 4
    features_for_read:
        com.delphix:hole_birth
        com.delphix:embedded_data
--------------------------------------------
LABEL 2
--------------------------------------------
    version: 5000
    name: 'Pool_SMB'
    state: 0
    txg: 579
    pool_guid: 14218318371378138485
    hostid: 2094371779
    hostname: 'mfsbsd'
    top_guid: 10867942708007115030
    guid: 10867942708007115030
    vdev_children: 1
    vdev_tree:
        type: 'disk'
        id: 0
        guid: 10867942708007115030
        path: '/dev/ada0'
        phys_path: '/dev/ada0'
        whole_disk: 1
        metaslab_array: 34
        metaslab_shift: 34
        ashift: 12
        asize: 3000588042240
        is_log: 0
        DTL: 42
        create_txg: 4
    features_for_read:
        com.delphix:hole_birth
        com.delphix:embedded_data
--------------------------------------------
LABEL 3
--------------------------------------------
    version: 5000
    name: 'Pool_SMB'
    state: 0
    txg: 579
    pool_guid: 14218318371378138485
    hostid: 2094371779
    hostname: 'mfsbsd'
    top_guid: 10867942708007115030
    guid: 10867942708007115030
    vdev_children: 1
    vdev_tree:
        type: 'disk'
        id: 0
        guid: 10867942708007115030
        path: '/dev/ada0'
        phys_path: '/dev/ada0'
        whole_disk: 1
        metaslab_array: 34
        metaslab_shift: 34
        ashift: 12
        asize: 3000588042240
        is_log: 0
        DTL: 42
        create_txg: 4
    features_for_read:
        com.delphix:hole_birth
        com.delphix:embedded_data

 zpool import
   pool: Pool_SMB
     id: 14218318371378138485
  state: ONLINE
 status: Some supported features are not enabled on the pool.
 action: The pool can be imported using its name or numeric identifier, though
   some features will not be available without an explicit 'zpool upgrade'.
 config:

   Pool_SMB    ONLINE
     ada0      ONLINE

 gpart show 
=>        34  5860533101  ada0  GPT  (2.7T)
          34      262144     1  ms-reserved  (128M)
      262178  5860270957        - free -  (2.7T)

=>        34  5860533101  diskid/DISK-WD-WMC4N0J9A1X4  GPT  (2.7T)
          34      262144                            1  ms-reserved  (128M)
      262178  5860270957                               - free -  (2.7T)

 gpart list
Geom name: ada0
modified: false
state: OK
fwheads: 16
fwsectors: 63
last: 5860533134
first: 34
entries: 128
scheme: GPT
Providers:
1. Name: ada0p1
   Mediasize: 134217728 (128M)
   Sectorsize: 512
   Stripesize: 4096
   Stripeoffset: 1024
   Mode: r0w0e0
   rawuuid: 996d404f-c837-4c7c-a8c1-2ed7a661422c
   rawtype: e3c9e316-0b5c-4db8-817d-f92df00215ae
   label: Microsoft reserved partition
   length: 134217728
   offset: 17408
   type: ms-reserved
   index: 1
   end: 262177
   start: 34
Consumers:
1. Name: ada0
   Mediasize: 3000592982016 (2.7T)
   Sectorsize: 512
   Stripesize: 4096
   Stripeoffset: 0
   Mode: r0w0e0

 glabel status
diskid/DISK-WD-WMC4N0J9A1X4     N/A  ada0
gptid/996d404f-c837-4c7c-a8c1-2ed7a661422c     N/A  ada0p1

I will be really grateful for any clues.
Thanks!