FreeNAS 9.1.0 RC1 Available


July 16, 2013

Alfred has announced that FreeNAS-9.1.0 Release Candidate 1 is available for download from

Release Notes for FreeNAS 9.1.0-RC1

This is the first release candidate for FreeNAS 9.1.0. We have passed a great alpha and rolling beta cycle with many bug fixes and regressions fixed. At this point, only bug fixes and regressions will be addressed.


The image size increased in FreeNAS 9.1.0-ALPHA. The new size requires a 4 GB storage device. The GUI upgrade can be used to upgrade a system from BETA3 or BETA4, but upgrades from earlier releases can only be done from the CD. The other option is
to save the config, reinstall the new version, then restore the config.

Major changes:

  1. Version 9.1-STABLE of FreeBSD with performance improvements, bug
    fixes, and updated software packages.
  2. Many improvements to the ZFS filesystem, including feature flags,
    TRIM support, enhanced drive removal notification, LZ4 compression,
    improved ARC memory reclamation and reliability improvements.
  3. Improved Plugin Jail subsystem which supports multiple jails and
    an enhanced UI including enhancements from PC-BSD Warden.
  4. Improved Volume manager including auto optimization of volumes
    for performance.
  5. Improvements to the encryption subsystem.
  6. Documentation enhancements.
  7. Increased base image size to 3.7GB.
  9. **IMPORTANT** Backward compatibility of FreeNAS 9.1 ZFS pools with older versions of ZFS is not to be expected. Upgrade pools with extreme caution, as all ZFS pool upgrades are one-way and only FreeNAS 9.1, FreeBSD 9-STABLE, and FreeBSD 8.4 currently support this ZFS pool format.
  10. To convert 8.* pluginjail to a 9.* pluginjail, please run the jail migration script like so (prior to configuring jails):
    /root/ -D
    Any plugins installed will need to be updated manually, this can be done
    on the services->plugins page.

The bug tracker for FreeNAS is available at

Discussion about FreeNAS occurs in the FreeNAS forums, located at: as well as in the official FreeNAS IRC channel on FreeNode in #freenas.

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