how-to-restore-zfs-pool-after-reinstall-system.md

1. Check zfs partition status.

# blkid
/dev/nvme0n1: PTTYPE="dos"
/dev/nvme0n1p1: UUID="okrmhV-gm3f-MC91-GejV-yONI-Xws1-uDKmIs" TYPE="LVM2_member"
/dev/sda1: LABEL="yuki" UUID="14119085054448600462" UUID_SUB="6285893604496654293" TYPE="zfs_member" PARTLABEL="zfs-d1d734cf9d112169" PARTUUID="1bf322cb-9af5-d543-a427-b22eeb9021e2"
/dev/sda9: PARTUUID="d9ca354a-f296-6d41-84a6-54d03e66b2d4"
/dev/sdb1: LABEL="yuki" UUID="14119085054448600462" UUID_SUB="3678569684473852681" TYPE="zfs_member" PARTLABEL="zfs-bfca6ce2abf2c93f" PARTUUID="bf9cdd03-3c1f-6743-93be-d7bff5c893cd"
/dev/sdb9: PARTUUID="c63caa4e-621d-3f4c-b308-8ec0cbdf5726"
/dev/sdc1: LABEL="yuki" UUID="14119085054448600462" UUID_SUB="2007402372256439981" TYPE="zfs_member" PARTLABEL="zfs-1dd2973aa2351f75" PARTUUID="4eaf10ec-d052-a64e-bcce-3deb56cffacc"
/dev/sdc9: PARTUUID="82ddb60c-3eac-8445-903d-8d81dda5eaf6"
/dev/sdd1: LABEL="yuki" UUID="14119085054448600462" UUID_SUB="13414481200101197823" TYPE="zfs_member" PARTLABEL="zfs-528229fd536bb1c4" PARTUUID="4404f35f-0315-764d-8efc-5a17ab7b0a7d"
/dev/sdd9: PARTUUID="1d91ba9c-f21a-0849-a366-8de616af4f69"
/dev/sde1: UUID="44ef8cae-e9da-4aa2-8d0d-a7e3e07bfb8f" TYPE="ext4" PARTLABEL="mapdata" PARTUUID="9d79a615-76be-4bb9-bdbc-45d396bbd7bb"
/dev/sdf1: UUID="2018-11-25-21-21-31-00" LABEL="CentOS 7 x86_64" TYPE="iso9660" PTTYPE="dos"
/dev/sdf2: SEC_TYPE="msdos" LABEL="ANACONDA" UUID="BD2B-21C8" TYPE="vfat"
/dev/mapper/centos_serena-root: UUID="836b7a1a-070d-4d2d-993c-c5ee49e6a666" TYPE="xfs"
/dev/sdg1: UUID="3965d4ff-ede9-4ed8-a99a-f15940606842" TYPE="ext4"

2. If there is no abnormality, follow the command.

# zpool import
   pool: yuki
     id: 14119085054448600462
  state: ONLINE
 action: The pool can be imported using its name or numeric identifier.
 config:

	yuki        ONLINE
	  mirror-0  ONLINE
	    sda     ONLINE
	    sdb     ONLINE
	  mirror-1  ONLINE
	    sdc     ONLINE
	    sdd     ONLINE

# zpool import <zpool_name>
# zpool status
  pool: yuki
 state: ONLINE
  scan: none requested
config:

	NAME        STATE     READ WRITE CKSUM
	yuki        ONLINE       0     0     0
	  mirror-0  ONLINE       0     0     0
	    sda     ONLINE       0     0     0
	    sdb     ONLINE       0     0     0
	  mirror-1  ONLINE       0     0     0
	    sdc     ONLINE       0     0     0
	    sdd     ONLINE       0     0     0

errors: No known data errors

3. Check disk status.

# df -T
Filesystem                     Type      1K-blocks    Used  Available Use% Mounted on
devtmpfs                       devtmpfs   41129880       0   41129880   0% /dev
tmpfs                          tmpfs      41141916       0   41141916   0% /dev/shm
tmpfs                          tmpfs      41141916    9888   41132028   1% /run
tmpfs                          tmpfs      41141916       0   41141916   0% /sys/fs/cgroup
/dev/mapper/centos_serena-root xfs       488143996 3001640  485142356   1% /
/dev/sdg1                      ext4      123212376  221536  116708856   1% /boot
tmpfs                          tmpfs       8228384       0    8228384   0% /run/user/9869
tmpfs                          tmpfs       8228384       0    8228384   0% /run/user/1000
yuki                           zfs      1885337856     128 1885337728   1% /yuki