Mount ZFS Disk to centos

# lsblk
NAME            MAJ:MIN RM   SIZE RO TYPE MOUNTPOINT
sda               8:0    0 465.8G  0 disk
├─sda1            8:1    0   350M  0 part
├─sda2            8:2    0 146.1G  0 part
├─sda3            8:3    0 172.8G  0 part
├─sda4            8:4    0     1K  0 part
├─sda5            8:5    0   512M  0 part /boot
└─sda6            8:6    0   146G  0 part
  ├─centos-swap 253:0    0   7.8G  0 lvm  [SWAP]
  └─centos-root 253:1    0 138.2G  0 lvm  /
sdb               8:16   0   1.8T  0 disk
├─sdb1            8:17   0     2G  0 part
└─sdb2            8:18   0   1.8T  0 part

//here sdb was an zfs file format

# mount /dev/sdb2 /mnt/freenasdata/
mount: unknown filesystem type 'zfs_member'

#yum install http://download.zfsonlinux.org/epel/zfs-release.el7_4.noarch.rpm

# yum install zfs

After reboot you will get zfs in listmodes

# lsmod | grep zfs
zfs                  3559892  3
zunicode              331170  1 zfs
zavl                   15236  1 zfs
icp                   270187  1 zfs
zcommon                73440  1 zfs
znvpair                89131  2 zfs,zcommon
spl                   102412  4 icp,zfs,zcommon,znvpair

# zpool import

   pool: SCOPENAS

     id: 6502146575892970952

  state: UNAVAIL

 status: The pool was last accessed by another system.

 action: The pool cannot be imported due to damaged devices or data.

   see: http://zfsonlinux.org/msg/ZFS-8000-EY

 config:

SCOPENAS                                  UNAVAIL  insufficient replicas

  raidz1-0                                UNAVAIL  insufficient replicas

    4cc412bf-321a-11e6-8870-408d5cb1877c  UNAVAIL

    sdb                                   ONLINE

    4e59003b-321a-11e6-8870-408d5cb1877c  UNAVAIL

    4f2c8b0f-321a-11e6-8870-408d5cb1877c  UNAVAIL

# zpool import SCOPENAS

cannot import 'SCOPENAS': pool was previously in use from another system.

Last accessed by  (hostid=98e6228c) at Thu Jan  1 05:30:00 1970

The pool can be imported, use 'zpool import -f' to import the pool.

# zpool import -f SCOPENAS

cannot import 'SCOPENAS': no such pool or dataset

Destroy and re-create the pool from

a backup source.

# zfs list
no datasets available

# zpool create scopenas /dev/sdb1
[root@boobalan-aadhardigital ~]# zpool list
NAME       SIZE  ALLOC   FREE  EXPANDSZ   FRAG    CAP  DEDUP  HEALTH  ALTROOT
scopenas  1.98G   432K  1.98G         -     0%     0%  1.00x  ONLINE  -

# zpool status
  pool: scopenas
 state: ONLINE
  scan: none requested
config:

NAME        STATE     READ WRITE CKSUM
scopenas    ONLINE       0     0     0
  sdb1      ONLINE       0     0     0

errors: No known data errors