Yesterday I upgraded my web server to the latest version of FreeBSD (9.0-RELEASE).
FreeBSD 9.0 supports ZFS v28:
$ zpool upgrade -v
This system is currently running ZFS pool version 28.
The following versions are supported:
VER DESCRIPTION
--- --------------------------------------------------------
1 Initial ZFS version
2 Ditto blocks (replicated metadata)
3 Hot spares and double parity RAID-Z
4 zpool history
5 Compression using the gzip algorithm
6 bootfs pool property
7 Separate intent log devices
8 Delegated administration
9 refquota and refreservation properties
10 Cache devices
11 Improved scrub performance
12 Snapshot properties
13 snapused property
14 passthrough-x aclinherit
15 user/group space accounting
16 stmf property support
17 Triple-parity RAID-Z
18 Snapshot user holds
19 Log device removal
20 Compression using zle (zero-length encoding)
21 Deduplication
22 Received properties
23 Slim ZIL
24 System attributes
25 Improved scrub stats
26 Improved snapshot deletion performance
27 Improved snapshot creation performance
28 Multiple vdev replacements
For more information on a particular version, including supported releases,
see the ZFS Administration Guide.Check ZFS version of our pools:
$ zpool get all tank
NAME PROPERTY VALUE SOURCE
tank size 2.70T -
tank capacity 0% -
tank altroot - default
tank health ONLINE -
tank guid 16518060353267231552 local
tank version 15 local
tank bootfs tank/root local
tank delegation on default
tank autoreplace off default
tank cachefile - default
tank failmode wait default
tank listsnapshots off default
tank autoexpand off default
tank dedupditto 0 default
tank dedupratio 1.00x -
tank free 2.70T -
tank allocated 8.29G -
tank readonly off -$ zpool upgrade
This system is currently running ZFS pool version 28.
The following pools are out of date, and can be upgraded. After being
upgraded, these pools will no longer be accessible by older software versions.
VER POOL
--- ------------
15 tank
Use 'zpool upgrade -v' for a list of available versions and their associated
features.So we need to upgrade our pool to the latest version:
$ zpool upgrade -a
This system is currently running ZFS pool version 28.
Successfully upgraded 'tank'
If you boot from pool 'tank', don't forget to update boot code.
Assuming you use GPT partitioning and da0 is your boot disk
the following command will do it:
gpart bootcode -b /boot/pmbr -p /boot/gptzfsboot -i 1 da0WARNING: Don’t forget to upgrade boot partition/partitions!
Check disk labels:
$ gpart show
=> 34 5860533101 ada0 GPT (2.7T)
34 2014 - free - (1M)
2048 128 1 freebsd-boot (64k)
2176 33554432 2 freebsd-swap (16G)
33556608 5826976527 3 freebsd-zfs (2.7T)
=> 34 5860533101 ada1 GPT (2.7T)
34 2014 - free - (1M)
2048 128 1 freebsd-boot (64k)
2176 33554432 2 freebsd-swap (16G)
33556608 5826976527 3 freebsd-zfs (2.7T)I have mirror partitions, so I need to upgrade bootcode on both of them:
$ gpart bootcode -b /boot/pmbr -p /boot/gptzfsboot -i 1 ada0
bootcode written to ada0
$ gpart bootcode -b /boot/pmbr -p /boot/gptzfsboot -i 1 ada1
bootcode written to ada1Run once again:
$ zfs upgrade -a
4 filesystems upgradedCheck zpool version:
$ zpool get all tank
NAME PROPERTY VALUE SOURCE
tank size 2.70T -
tank capacity 0% -
tank altroot - default
tank health ONLINE -
tank guid 16518060353267231552 default
tank version 28 default
tank bootfs tank/root local
tank delegation on default
tank autoreplace off default
tank cachefile - default
tank failmode wait default
tank listsnapshots off default
tank autoexpand off default
tank dedupditto 0 default
tank dedupratio 1.00x -
tank free 2.70T -
tank allocated 8.30G -
tank readonly off -And don’t forget to reboot:
$ shutdown -r now