Grown-up ZFS Data Corruption Bug

2025-11-26

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Hey hey! We recently tripped over a ZFS data corruption bug–introduced over 18 years ago! Bryan and Adam discuss with members of the Oxide team as well as Matt Ahrens, the co-inventor of ZFS.In addition to Bryan Cantrill and Adam Leventhal, speakers included Alan Hanson, Matt Keeter, Andy Fiddaman, James MacMahon, and special guest, Matt Ahrens.Previously, on Oxide and Friends:OxF s4e6 - Crucible: the Oxide Storage ServiceOxF s5e28 - Systems Software in the LargeSome of the topics we hit on, in the o...

Hey hey! We recently tripped over a ZFS data corruption bug–introduced over 18 years ago! Bryan and Adam discuss with members of the Oxide team as well as Matt Ahrens, the co-inventor of ZFS.

In addition to Bryan Cantrill and Adam Leventhal, speakers included Alan Hanson, Matt Keeter, Andy Fiddaman, James MacMahon, and special guest, Matt Ahrens.

Previously, on Oxide and Friends:

OxF s4e6 - Crucible: the Oxide Storage Service
OxF s5e28 - Systems Software in the Large

Some of the topics we hit on, in the order that we hit them:

ZFS fsync can trigger ZIL transaction reordering and data corruption
RFD 177: Implementation of Data Storage
the "fix" that introduced data corruption
PRs needed!

If we got something wrong or missed something, please file a PR! Our next show will likely be on Monday at 5p Pacific Time on our Discord server; stay tuned to our Mastodon feeds for details, or subscribe to this calendar. We'd love to have you join us, as we always love to hear from new speakers!

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