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A comment on ZFS 2.3.0 released with ZFS raidz expansion. Parent comment

Re:ZFS 2.3.0 released with ZFS raidz expansion by E39M5S62 on Tuesday January 14, 2025 @09:48PM (#42706755)
It's great to hear that you're using ZFSBootMenu the way I envisioned it! There's such a sense of relief and freedom having snapshots of your whole OS taken every 15 minutes.

One thing that you might not be aware of is that you can create a zpool checkpoint before doing something 'dangerous' (disk swap, pool version upgrade, etc) and if it goes badly, roll back to that checkpoint in ZFSBootMenu on the Pool tab. Keep in mind though that you can only have one checkpoint at a time, they keep growing and growing, and a rollback is for EVERYTHING on the pool.

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Re:ZFS 2.3.0 released with ZFS raidz expansion by zbentley on Tuesday January 14, 2025 @11:44PM (#42707403)
Oh, are you zdykstra? If so, thanks for creating an invaluable tool!

> you can create a zpool checkpoint before doing something 'dangerous' (disk swap, pool version upgrade, etc) and if it goes badly, roll back to that checkpoint in ZFSBootMenu on the Pool tab

Good to know! Snapshots meet most of my needs at present (since my boot volume is a single fast drive, snapshots ~~ checkpoints in this case), but I could see this coming in useful for future scenarios where I need to do complex or risky things with data volumes or SAN layout changes.

[ Parent | on HN ]