Tonight, 22:45 UTC, I'm talking at NYCBUG. "What's Changed Since I Came This Way: A Talk that was supposed to be about #OpenZFS" #sysadmin #freebsd

In meatspace in New York City, and streamed online. https://www.nycbug.org/

NYC*BUG

New York City BSD User Group

Next NYC*BUG: Tonight!
What's Changed Since The Last Time I Came this Way - a talk that was supposed to be about OpenZFS, Michael W Lucas
2026-04-01 @ 18:45 local (22:45 UTC) - Backroom of Brass Monkey 55 Little West 12th St
https://www.nycbug.org/index.html

#runbsd #openzfs

NYC*BUG

New York City BSD User Group

So apparently it's not just `readonly` inheritance that's fscked up on #FreeBSD #OpenZFS but also `atime`?
⚙ D47996 adduser(8): Add documentation for ZFS encrypted home dataset

Seamless login/logout with ZFS Encrypted Home Directories

Next NYC*BUG: Wednesday April 1st
What's Changed Since The Last Time I Came this Way - a talk that was supposed to be about OpenZFS, by Michael W Lucas
2026-04-01 @ 18:45 local (22:45 UTC) - Backroom of Brass Monkey 55 Little West 12th St
https://www.nycbug.org/
Hear how the newest ZFS book is going and what @mwl has planned.

Flyer: https://www.nycbug.org/media/2026-04-01_Lucas_Flyer.pdf

#openzfs #runbsd

NYC*BUG

New York City BSD User Group

progress on my slides for the NYCBUG talk next Wednesday.

Yes, an April Fools' talk. On #openzfs, sort of.

https://www.nycbug.org/

NYC*BUG

New York City BSD User Group

I tend to keep too many #OpenZFS #ZFS boot environments. Case in point, my DNS server:

BE Active Mountpoint Space Created
15s-2026-01-21_01 NR / 30.4G 2026-01-21 12:53
default - - 735M 2020-03-22 05:06
master-2020-03-22_01 - - 948M 2020-03-22 09:23
master-2020-06-19_01 - - 1001M 2020-06-19 03:00
master-2020-10-20_01 - - 1017M 2020-10-20 09:11
master-2021-01-11_01 - - 1014M 2021-01-11 12:21
master-2021-04-05_01 - - 95.4M 2021-04-05 19:43
master-2021-06-25_01 - - 1.20G 2021-06-25 10:58
master-2021-08-31_01 - - 1.26G 2021-08-31 08:13
master-2021-10-07_01 - - 1.36G 2021-10-07 10:39
master-2022-03-25_01 - - 1.25G 2022-03-25 18:14
master-2023-01-22_01 - - 1.41G 2023-01-22 06:15
master-2023-06-02_01 - - 1.52G 2023-06-02 20:11
master-2023-08-27_01 - - 1.51G 2023-08-27 12:34
master-2023-11-09_01 - - 1.55G 2023-11-09 14:08
master-2024-03-29_01 - - 1.60G 2024-03-29 18:47
master-2024-10-01_01 - - 1.54G 2024-10-01 16:29
master-2024-11-30_01 - - 1.46G 2024-11-30 17:58
master-2025-08-06_01 - - 2.05G 2025-08-06 14:00
master-2025-12-27_01 - - 1.40G 2025-12-27 18:09

Still have the original boot environment created six years ago.

Something about the latest #OpenZFS merge into #FreeBSD causes issues when building FreeBSD traditional (non-UEFI) BIOS bootloaders. It ballooned the size of the object files to more than the 512 bytes as required by MBR.

@ToshInMacc What was the typo? What OpenZFS document mentions the absolute need for minimum of 4 disks?

For #RAIDZ2 #OpenZFS documentation mentions https://openzfs.github.io/openzfs-docs/Basic%20Concepts/VDEVs.html#what-are-the-different-types-of-vdevs ...

『... Requires at least 3 disks (5+ recommended), can tolerate two drive failures.』

@floe

VDEVs — OpenZFS documentation