Newer versions of ZFS introduce bug fixes, support for newer kernels, and in some instances, introduce new storage pool features.
Portage will update these packages in the normal fashion through
emerge --update @world. Important additional steps are often required for Funtoo Linux installed on a ZFS storage pool.
* The ZFS ebuilds are
As best practice, it is strongly recommended that all users backup their data on a regular basis - irrespective of the file system being used. This could be particularly important should something go wrong while modifying or updating a live file system.
Funtoo installed on ZFS
Special attention should be given when updating ZFS with Funtoo Linux installed onto ZFS: i.e. root (/) resides in a storage pool. In particular, initramfs responsible for importing and mounting root (/) during boot ideally should be updated prior to rebooting. Placing the updated executables (
/sbin/zfs) in your initramfs will reduce the likelihood of boot failure. Updating initramfs may require the updating of bootloader or UEFI configuration.
For typical installations, GRUB can support
/boot residing within a ZFS storage pool (together with root
/). There is an official installation guide for this configuration: ZFS Install Guide.
Updating from old versions of ZFS (0.6.3 or older) will introduce new storage pool features. Old versions of GRUB may not be able to support
/boot residing on a pool that utilizes these latest features. To reduce the likelihood of boot failure, GRUB should be updated before upgrading storage pools.
Once Portage has completed updating the ZFS packages, review the status of your root storage pool. Here, this is assumed to be
rpool and when upgrading from old ZFS may indicate the availability of new features.
root # zpool status pool: rpool state: ONLINE status: Some supported features are not enabled on the pool. The pool can still be used, but some features are unavailable. action: Enable all features using 'zpool upgrade'. Once this is done, the pool may no longer be accessible by software that does not support the features. See zpool-features(5) for details. scan: none requested config: NAME STATE READ WRITE CKSUM rpool ONLINE 0 0 0 ata-Samsung_SSD_840_EVO_120GB_123456789ABCDEF ONLINE 0 0 0 errors: No known data errors
To reduce the likelihood of your system from to boot with this new ZFS:
- For now, ignore the option to upgrade the storage pool
- Update your initramfs to include the latest ZFS binary executables.
- Ensure and if possible upgrade No results to the latest version. Follow Install for instructions on how to install GRUB.
- Confirm that you are able to successfully reboot following these updates.
Updating (root) Storage Pool Features
work in progress..
root # zpool upgrade This system supports ZFS pool feature flags. All pools are formatted using feature flags. Some supported features are not enabled on the following pools. Once a feature is enabled the pool may become incompatible with software that does not support the feature. See zpool-features(5) for details. POOL FEATURE --------------- rpool async_destroy empty_bpobj lz4_compress spacemap_histogram enabled_txg hole_birth extensible_dataset embedded_data bookmarks filesystem_limits large_blocks
root # zpool upgrade rpool This system supports ZFS pool feature flags. Enabled the following features on 'rpool': async_destroy empty_bpobj lz4_compress spacemap_histogram enabled_txg hole_birth extensible_dataset embedded_data bookmarks filesystem_limits large_blocks
root # zpool status pool: rpool state: ONLINE scan: none requested config: NAME STATE READ WRITE CKSUM rpool ONLINE 0 0 0 ata-Samsung_SSD_840_EVO_120GB_123456789ABCDEF ONLINE 0 0 0 errors: No known data errors