Solved FreeBSD 13.0 release zfs features not activated (State : read-only compatible) after zpool upgrade -a

R

rai.mohammed

After upgrade from FreeBSD 12.2 to FreeBSD 13.0, ZFS features are not activated and stay in state (read-only compatible) after zpool upgrade -a

Updating the BIOS boot-loader :
Code: 
# gpart bootcode -b /boot/pmbr -p /boot/gptzfsboot -i 1 ada0
partcode written to ada0p1
bootcode written to ada0

# shutdown -r now

# uname -a            
FreeBSD freebsd12_srv_odoo12ce 13.0-RELEASE FreeBSD 13.0-RELEASE #0 releng/13.0-n244733-ea31abc261f: Fri Apr  9 04:24:09 UTC 2021     
[email]root@releng1.nyi.freebsd.org[/email]:/usr/obj/usr/src/amd64.amd64/sys/GENERIC  amd64
# freebsd-version -kru
13.0-RELEASE
13.0-RELEASE
13.0-RELEASE

# zfs --version    
zfs-2.0.0-rc1
zfs-kmod-v2021030100-zfs_2e160dee9

# zpool version 
zfs-2.0.0-rc1
zfs-kmod-v2021030100-zfs_2e160dee9

# zfs upgrade -v
The following filesystem versions are supported:

VER  DESCRIPTION
---  --------------------------------------------------------
 1   Initial ZFS filesystem version
 2   Enhanced directory entries
 3   Case insensitive and filesystem user identifier (FUID)
 4   userquota, groupquota properties
 5   System attributes

For more information on a particular version, including supported releases,
see the ZFS Administration Guide.

# zpool status -v
  pool: pgpool
 state: ONLINE
config:

        NAME        STATE     READ WRITE CKSUM
        pgpool      ONLINE       0     0     0
          ada1      ONLINE       0     0     0

errors: No known data errors

  pool: zroot
 state: ONLINE
config:

        NAME        STATE     READ WRITE CKSUM
        zroot       ONLINE       0     0     0
          ada0p3    ONLINE       0     0     0

errors: No known data errors
# zpool upgrade -v
This system supports ZFS pool feature flags.

The following features are supported:

FEAT DESCRIPTION
-------------------------------------------------------------
async_destroy                         (read-only compatible)
     Destroy filesystems asynchronously.
empty_bpobj                           (read-only compatible)
     Snapshots use less space.
lz4_compress                         
     LZ4 compression algorithm support.
multi_vdev_crash_dump                
     Crash dumps to multiple vdev pools.
spacemap_histogram                    (read-only compatible)
     Spacemaps maintain space histograms.
enabled_txg                           (read-only compatible)
     Record txg at which a feature is enabled
hole_birth                           
     Retain hole birth txg for more precise zfs send
extensible_dataset                   
     Enhanced dataset functionality, used by other features.
embedded_data                        
     Blocks which compress very well use even less space.
bookmarks                             (read-only compatible)
     "zfs bookmark" command
filesystem_limits                     (read-only compatible)
     Filesystem and snapshot limits.
large_blocks                         
     Support for blocks larger than 128KB.
large_dnode                          
     Variable on-disk size of dnodes.
sha512                               
     SHA-512/256 hash algorithm.
skein                                
     Skein hash algorithm.
userobj_accounting                    (read-only compatible)
     User/Group object accounting.
encryption                           
     Support for dataset level encryption
project_quota                         (read-only compatible)
     space/object accounting based on project ID.
device_removal                       
     Top-level vdevs can be removed, reducing logical pool size.
obsolete_counts                       (read-only compatible)
     Reduce memory used by removed devices when their blocks are freed or remapped.
zpool_checkpoint                      (read-only compatible)
     Pool state can be checkpointed, allowing rewind later.
spacemap_v2                           (read-only compatible)
     Space maps representing large segments are more efficient.
allocation_classes                    (read-only compatible)
     Support for separate allocation classes.
resilver_defer                        (read-only compatible)
     Support for deferring new resilvers when one is already running.
bookmark_v2                          
     Support for larger bookmarks
redaction_bookmarks                  
     Support for bookmarks which store redaction lists for zfs redacted send/recv.
redacted_datasets                    
     Support for redacted datasets, produced by receiving a redacted zfs send stream.
bookmark_written                     
     Additional accounting, enabling the written#<bookmark> property(space written since a bookmark), and estimates of send stream sizes for incrementals from bookmarks.
log_spacemap                          (read-only compatible)
     Log metaslab changes on a single spacemap and flush them periodically.
livelist                              (read-only compatible)
     Improved clone deletion performance.
device_rebuild                        (read-only compatible)
     Support for sequential mirror/dRAID device rebuilds
zstd_compress                        
     zstd compression algorithm support.
draid                                
     Support for distributed spare RAID

The following legacy versions are also 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.

# zpool upgrade -a
This system supports ZFS pool feature flags.

All pools are already formatted using feature flags.

Every feature flags pool already has all supported and requested features enabled.
# zpool upgrade -v
This system supports ZFS pool feature flags.

The following features are supported:

FEAT DESCRIPTION
-------------------------------------------------------------
async_destroy                         (read-only compatible)
     Destroy filesystems asynchronously.
empty_bpobj                           (read-only compatible)
     Snapshots use less space.
lz4_compress                         
     LZ4 compression algorithm support.
multi_vdev_crash_dump                
     Crash dumps to multiple vdev pools.
spacemap_histogram                    (read-only compatible)
     Spacemaps maintain space histograms.
enabled_txg                           (read-only compatible)
     Record txg at which a feature is enabled
hole_birth                           
     Retain hole birth txg for more precise zfs send
extensible_dataset                   
     Enhanced dataset functionality, used by other features.
embedded_data                        
     Blocks which compress very well use even less space.
bookmarks                             (read-only compatible)
     "zfs bookmark" command
filesystem_limits                     (read-only compatible)
     Filesystem and snapshot limits.
large_blocks                         
     Support for blocks larger than 128KB.
large_dnode                          
     Variable on-disk size of dnodes.
sha512                               
     SHA-512/256 hash algorithm.
skein                                
     Skein hash algorithm.
userobj_accounting                    (read-only compatible)
     User/Group object accounting.
encryption                           
     Support for dataset level encryption
project_quota                         (read-only compatible)
     space/object accounting based on project ID.
device_removal                       
     Top-level vdevs can be removed, reducing logical pool size.
obsolete_counts                       (read-only compatible)
     Reduce memory used by removed devices when their blocks are freed or remapped.
zpool_checkpoint                      (read-only compatible)
     Pool state can be checkpointed, allowing rewind later.
spacemap_v2                           (read-only compatible)
     Space maps representing large segments are more efficient.
allocation_classes                    (read-only compatible)
     Support for separate allocation classes.
resilver_defer                        (read-only compatible)
     Support for deferring new resilvers when one is already running.
bookmark_v2                          
     Support for larger bookmarks
redaction_bookmarks                  
     Support for bookmarks which store redaction lists for zfs redacted send/recv.
redacted_datasets                    
     Support for redacted datasets, produced by receiving a redacted zfs send stream.
bookmark_written                     
     Additional accounting, enabling the written#<bookmark> property(space written since a bookmark), and estimates of send stream sizes for incrementals from bookmarks.
log_spacemap                          (read-only compatible)
     Log metaslab changes on a single spacemap and flush them periodically.
livelist                              (read-only compatible)
     Improved clone deletion performance.
device_rebuild                        (read-only compatible)
     Support for sequential mirror/dRAID device rebuilds
zstd_compress                        
     zstd compression algorithm support.
draid                                
     Support for distributed spare RAID

The following legacy versions are also 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.
 
Nothing. Your pool is fine. This is information you might need if you ever want to import that pool on an older/different implementation of ZFS that doesn't support these features.
 
I find the tag of "read-only compatible" for ZFS features in up-to-date FreeBSD 13.0-Release, is confusing and shouldn't appears with supported OS Release and ZFS versions.
Thanks for the replay and the clarification.
 
Quote from FreeBSDHelp :
" Users can import pools from other OS’s or FreeBSD versions (supported and no longer) with different feature flags, some of which can be imported in a read only mode."

Quote from Allen Jude allanjude:
" To see the actual state of each feature, look at 'zpool get all poolname' Each will be feature@name Will be disabled (not upgraded yet), enabled (usable), or activated (in use)"

The verification of the ZFS features with :
# zpool get all | grep async_destroy,resilver_defer
confirms that the #OpenZFS features are enabled.
Thanks for your clarifications. 🤝👍🙏
 
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