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# Tested on RHEL 6 & 7
# ZFS is a combined file system and logical volume manager designed by Sun Microsystems. # The features of ZFS include protection against data corruption, support for high storage # capacities, integration of the concepts of filesystem and volume management, snapshots # and copy-on-write clones, continuous integrity checking and automatic repair, RAID-Z and # native NFSv4 ACLs. ZFS is implemented as open-source software, licensed under the Common # Development and Distribution License (CDDL). # Even if ZFS can use partitions, it is recommended to use whole disks. # 'zfs' daemon must be started at boot-up. zpool are not defined in /etc/fstab; the zfs # daemon will import and mount zfs pools automatically. It reads the file # /etc/zfs/zpool.cache. # ------------------------------------------------------------------------------------------ # Creating a concat zpool # ------------------------------------------------------------------------------------------ POOLNAME=c_pool POOLMNTP=/c_pool DEVICE01=/dev/sdb DEVICE02=/dev/sdc # At the time of creation, mount point for the newly created pool may be specified. If not # specified, pool will be mounted under /<zpool_name> (on the other hand, if specified at # the moment of creation, mountpoint won't be automatically removed when destroying the # pool) zpool create -m $POOLMNTP $POOLNAME $DEVICE01 $DEVICE02 # If you have an error like this one: invalid vdev specification use '-f' to override the following errors: /dev/sdb does not contain an EFI label but it may contain partition information in the MBR. # you should use '-f' option to create the pool - first ensure that disk(s) are the # right one(s): # zpool create -f -m $POOLMNTP $POOLNAME $DEVICE01 $DEVICE02 # Check zpool list NAME SIZE ALLOC FREE CAP DEDUP HEALTH ALTROOT c_pool 19.9G 104K 19.9G 0% 1.00x ONLINE - zpool status $POOLNAME pool: c_pool state: ONLINE scan: none requested config: NAME STATE READ WRITE CKSUM c_pool ONLINE 0 0 0 sdb ONLINE 0 0 0 sdc ONLINE 0 0 0 zfs list NAME USED AVAIL REFER MOUNTPOINT c_pool 104K 19.6G 30K /c_pool # ------------------------------------------------------------------------------------------ # Creating a mirrored zpool # ------------------------------------------------------------------------------------------ POOLNAME=m_pool POOLMNTP=/m_pool SUBMIRR1=/dev/sdb SUBMIRR2=/dev/sdc # At the time of creation, mount point for the newly created pool may be specified. If not # specified, pool will be mounted under /<zpool_name> (on the other hand, if specified at # the moment of creation, mountpoint won't be automatically removed when destroying the # pool) zpool create -m $POOLMNTP $POOLNAME mirror $SUBMIRR1 $SUBMIRR2 # If you have an error like this one: invalid vdev specification use '-f' to override the following errors: /dev/sdb does not contain an EFI label but it may contain partition information in the MBR. # you should use '-f' option to create the pool - first ensure that disk(s) are the # right one(s): # zpool create -f -m $POOLMNTP $POOLNAME mirror $SUBMIRR1 $SUBMIRR2 # Check zpool list NAME SIZE ALLOC FREE CAP DEDUP HEALTH ALTROOT m_pool 9.94G 100K 9.94G 0% 1.00x ONLINE - zpool status $POOLNAME pool: m_pool state: ONLINE scan: none requested config: NAME STATE READ WRITE CKSUM m_pool ONLINE 0 0 0 mirror-0 ONLINE 0 0 0 sdb ONLINE 0 0 0 sdc ONLINE 0 0 0 errors: No known data errors zfs list NAME USED AVAIL REFER MOUNTPOINT m_pool 100K 9.78G 30K /m_pool |