What will the default file system be in FreeBSD 9?

2 Answers 2


It's still UFS. The installer (bsdinstall as of 9.0) cannot install to a ZFS filesystem.

If you want ZFS for your root filesystem you need to do a fully manual install.

  • That's frustrating that ZFS doesn't work by using the installer. Thanks for the info.
    – Hank8
    Dec 18, 2011 at 22:25
  • Do you know if there is plan (when) to have ZFS work using the bsdinstaller?
    – Hank8
    Dec 18, 2011 at 22:25
  • I don't believe there is a firm plan yet. You're better off asking on the current@ or stable@ mailing list. For now if you want ZFS the wiki has several good guides. I've used this successfully on several servers. Dec 18, 2011 at 22:28
  • mfsbsd.vx.sk also has a script that automates installation of FreeBSD 9 with ZFS as the root filesystem. Dec 19, 2011 at 4:34
  • 1
    Not to be offensive, but if you don't know how to install on ZFS manually it's probably a good idea not to be using it as the root FS. ZFS is quite different from UFS in many important administrative ways and the switch should not be taken lightly.
    – Chris S
    Dec 24, 2011 at 15:38

PC-BSD installer can install FreeBSD on ZFS. As soon as the installation start, you may choose you want to install FreeBSD (instead of PC-BSD) and then the installer lets you partition your disk using ZFS.

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