That's right - RAIDZ (and mirroring) only use the space of the smallest disk in the group, so they should normally be all the same size. As with other uses of `zpool attach` (to mirrors), the new drive needs to be no smaller than the existing disks.
--matt On Wed, Nov 8, 2023 at 4:09 PM Anthony D'Atri <anthony.da...@gmail.com> wrote: > Nice. Is it the case that added drives must be the same -- or no smaller > than -- existing drives in the RAID-Z group? The documentarian in me would > call that out explicitly. > > On Nov 8, 2023, at 19:01, Don Brady <dev.fs....@gmail.com> wrote: > > I'm happy to announce that the long-awaited *RAIDZ Expansion* feature has > officially landed in the OpenZFS master branch. This feature will need some > soak time, but will be available in the OpenZFS 2.3 release, which is > probably about a year out. > > A huge thanks and shout out to Matt Ahrens for the design, implementation, > and ongoing consultations. Also many thanks to the sponsors, The FreeBSD > Foundation, iXsystems, Inc., and vStack. > > Thanks to our OpenZFS community members for code contributions, testing > and feedback. Including: > Fedor Uporov, Stuart Maybee, Thorsten Behrens, Fmstrat, Mark Maybee, Brian > Behlendorf, and others. > > Cheers, > Don Brady > > https://github.com/openzfs/zfs/commit/5caeef02fa531 > > > *openzfs <https://openzfs.topicbox.com/latest>* / openzfs-developer / see > discussions <https://openzfs.topicbox.com/groups/developer> + participants > <https://openzfs.topicbox.com/groups/developer/members> + delivery options > <https://openzfs.topicbox.com/groups/developer/subscription> Permalink > <https://openzfs.topicbox.com/groups/developer/T4db1687ae03a5df6-M6b0994ac6a83cee6ba058261> > ------------------------------------------ openzfs: openzfs-developer Permalink: https://openzfs.topicbox.com/groups/developer/T4db1687ae03a5df6-M8b714d5d80afec217489d8f7 Delivery options: https://openzfs.topicbox.com/groups/developer/subscription
