ZFS versions in Solaris 10
New ZFS features to both pool and file system are introduced and accessible by using a specific ZFS version that is available in the Solaris OS. You can use the zpool upgrade or zfs upgrade to identify whether a pool or file system is at lower version than the currently running Solaris release provides. You can also use these commands to upgrade your pool and file system versions.
This article gives a brief description of the available features of each version, and the Solaris 10 release that provides the ZFS version and feature.
ZFS Pool versions
The following table provides a list of ZFS pool versions that are available in the Solaris release.
| Version | Solaris 10 release | Description |
|---|---|---|
| 1 | 6/06 | Initial ZFS version |
| 2 | 11/06 | Ditto blocks (replicated metadata) |
| 3 | Hot spares and double parity RAID-Z | |
| 4 | 8/07 | zpool history |
| 5 | 10/08 | gzip compression algorithm |
| 6 | bootfs pool property | |
| 7 | Separate intent log devices | |
| 8 | Delegated administration | |
| 9 | refquota and refreservation properties | |
| 10 | 5/09 | Cache devices |
| 11 | 10/09 | Improved scrub performance |
| 12 | Snapshot properties | |
| 13 | snapused property | |
| 14 | aclinherit passthrough-x property | |
| 15 | user and group space accounting | |
| 16 | 9/10 | stmf property support |
| 17 | Triple-parity RAID-Z | |
| 18 | Snapshot user holds | |
| 19 | Log device removal | |
| 20 | Compression using zle (zero-length encoding) | |
| 21 | Reserved | |
| 22 | Received properties | |
| 23 | 8/11 | Slim ZIL |
| 24 | System attributes | |
| 25 | Improved scrub stats | |
| 26 | Improved snapshot deletion performance | |
| 27 | Improved snapshot creation performance | |
| 28 | Multiple vdev replacements | |
| 29 | RAID-Z/mirror hybrid allocator | |
| 30 | 1/13 | Reserved |
| 31 | Improved zfs list performance | |
| 32 | One MB blocksize |
ZFS File System versions
The following table lists the ZFS file system versions that are available in the Solaris 10 release. Keep in mind that a feature that is available in a specific file system version requires a specific pool version.
| Version | Solaris 10 release | Description |
|---|---|---|
| 1 | 6/06 | Initial ZFS file system version |
| 2 | 10/08 | Enhanced directory entries |
| 3 | Case insensitivity and file system unique identifier (FUID) | |
| 4 | 10/09 | userquota and groupquota properties |
| 5 | 8/11 | System attributes |