#zfs

@hund@fosstodon.org @claudiom@bsd.network Primary production uses FreeBSD with #ZFS, so no issues here. Fedora is on a workstation that has a lot of storage, so I use #OpenZFS there to manage it all (non-root).

@claudiom@bsd.network I wonder if the upgrade from 44 to 45 will bork #OpenZFS running on the host? #ZFS

Days since a ZFS snapshot last saved a customer’s data, time, and work: 0. #ZFS

No #ZFS on #NetBSD #riscv for me :(

Spread the news 📣 We are excited to announce the BSD, illumos, OpenZFS, bhyve Devroom was accepted @ FOSDEM'27 The CFP is open, all the details are on the website https://people.freebsd.org/~rodrigo/fosdem27/ You can now start submitting your proposals till December, but of course the sooner, the better. #FreeBSD, #NetBSD, #OpenBSD, #illumos, #zfs, #bhyve, #Fosdem , #fosdem2027

TIL you can nullfs mount a #ZFS snapshot. This could be particularly useful for making sure jail root filesystems are absolutely 100% immutable: hbsd-current-02[shawn]:/home/shawn $ uname -a FreeBSD hbsd-current-02 16.0-CURRENT FreeBSD 16.0-CURRENT #0 hardened/current/master-n196551-d4411c7c9cc3-dirty: Wed Sep 16 19:42:46 UTC 2026 shawn@hbsd-current-02:/usr/obj/usr/src/amd64.amd64/sys/HARDENEDBSD amd64 hbsd-current-02[shawn]:/home/shawn $ sudo mount -t nullfs /usr/ports/.zfs/snapshot/2026-07-24_before /mnt $ ls -l /usr/ports | head -n 5 total 3215 -rw-r--r-- 1 shawn shawn 149175 Oct 7 00:59 CHANGES -rw-r--r-- 1 shawn shawn 727 Apr 26 18:13 CONTRIBUTING.md -rw-r--r-- 1 shawn shawn 1412 Apr 26 18:13 COPYRIGHT -rw-r--r-- 1 shawn shawn 13370 Oct 1 18:46 GIDs hbsd-current-02[shawn]:/home/shawn $ mount | grep nullfs /usr/ports/.zfs/snapshot/2026-07-24_before on /mnt (nullfs, local) hbsd-current-02[shawn]:/home/shawn $ touch /mnt/blah touch: /mnt/blah: Read-only file system hbsd-current-02[shawn]:/home/shawn (1) $ echo ohai > /mnt/README zsh: read-only file system: /mnt/README #FreeBSD #HardenedBSD #infosec #OpenZFS

I actually read the #FreeBSD Handbook's chapter on how FreeBSD bootstraps. It's stuck in 2010. I'm not kidding. There's stuff in there that changed in the FreeBSD 7.3 release notes. FreeBSD can boot on UEFI firmware nowadays, and directly from ZFS datasets. There's a gpart bootstrap command, and syscons does not use bright white for kernel messages any more. In the meantime, the Handbook is telling people how to accidentally destroy their MBR or GUID partition tables with bsdlabel. Do you think that we can get the Handbook people to catch up with the actual operating system, that is 16 years ahead? (-: https://github.com/jdebp/freebsd-doc/blob/main/documentation/content/en/books/handbook/boot/_index.adoc #UEFI #ZFS

#bhyve with #ZFS rollback makes testing boot environments for #openzfsmastery sooo much easier. Snapshots on the hypervisor. Snapshots in the VM. Snapshots EVERYWHERE. #sysadmin

It's probably time to have a deeper look at #Zelta #ZFS #FreeBSD

@anparker@mastodon.bsd.cafe @mroach@ublog.mroach.com @subnetspider@mastodon.bsd.cafe Unused RAM is wasted $$$$ #ZFS The consumption of RAM will back off if it is needed for other purposes but why not have it improve storage performance if the RAM is just running idle in a host.

One of my NVMe SSDs dropped out of several arrays, again. 👉 a Transcend MTE220S 256er As an IT guy myself, i've just rebooted the box. That made matters worse, because the dodgy SSD didn't enumerate (/dev/nvme*), and i was left with 3/4 SSDs, incorrectly enumerated. My #ZFS pools re-imported fine, albeit in a DEGRADED state. zpool replace is bullshit! 🤬 ..it NEVER wörks! I had to power-cycle the box, and zpool detach/remove, then add & resilver shit! SMART reports look fine! 🧵1/n..

Well I gotta say, moving #MastodonAU 's database to a pure SSD storage backend has made a massive difference. Whooohoo, she's much faster! The storage servers are a pair of #Dell R640s, with 2x Gold 6150 (2.7GHz 18 Cores each) and 256GB of RAM. Each one has 8 x 1TB SSDs, in a #ZFS raidz2 pool, and they automatically replicate between themselves. I am doing my best to avoid any more visits from the #fuckup-fairy Now to finish #MastodonNZ

With Apple phasing out AFP in macOS 27 and Time Capsules officially reaching end-of-life, it's time to move network backups to proper SMB. If you run a FreeBSD server, you can build a fast, rock-solid, and secure Time Machine target powered by ZFS and Samba - neatly isolated inside a FreeBSD jail using Bastille. https://it-notes.dragas.net/2026/01/28/time-machine-freebsd-jail/ Keep your macOS backups running smoothly via SMBv3 (with full vfs_fruit support) and full dataset quota control on ZFS! #FreeBSD #macOS #TimeMachine #ZFS #BastilleBSD #Samba #SysAdmin #Backup #OwnYourData #SelfHosted #BSD #RunBSD #OwnYourData

How much disk space does it take to reliably track & scan all the important open-source software releases published throughout the year? About 120TB. Thanks to #FreeBSD, #ZFS, #WesternDigital, and #Ampere for being awesome. :)

Nearly two years ago I noticed one NVME disk had endurance gone down to zero. It has been part of ZFS RaidZ3 six drive pool under constant write load. Normally I would replace such drive. But this time I decided to see how long it takes to break it. And the answer is - almost two years. The disk receives few MB/s writes *minimum* with hundreds MB/s peaks, maybe 100TB writes per year. I'll try to dig some numbers later. So, looks like there is ample headroom in NVME write endurance claims. (statistics from sample of one 🤣 ) I think I'll let the pool run sans one drive.It should survive two more drive failures. And there are daily/weekly/monthly backups available. Maybe buy new after AI bubble bursts. #homelab #zfs #diskfailure

If Scrubs Hurt, Your ZFS Design Is Broken https://klarasystems.com/articles/if-scrubs-hurt-your-zfs-design-is-broken/ #HackerNews #Tech #ZFS

Latest 𝗩𝗮𝗹𝘂𝗮𝗯𝗹𝗲 𝗡𝗲𝘄𝘀 - 𝟮𝟬𝟮𝟲/𝟬𝟳/𝟮𝟳 (Valuable News - 2026/07/27) available. https://vermaden.wordpress.com/2026/07/27/valuable-news-2026-07-27/ Past releases: https://vermaden.wordpress.com/news/ #verblog #vernews #news #bsd #freebsd #openbsd #netbsd #linux #unix #zfs #opnsense #ghostbsd #solaris #vermadenday

All #BSD and #ZFS wizards alert Please focus all your mojo on helping the people who posted the ZFS/BSD admin job that I just applied for to see that I am their dream come true.

Latest 𝗩𝗮𝗹𝘂𝗮𝗯𝗹𝗲 𝗡𝗲𝘄𝘀 - 𝟮𝟬𝟮𝟲/𝟬𝟳/𝟮𝟬 (Valuable News - 2026/07/20) available. https://vermaden.wordpress.com/2026/07/20/valuable-news-2026-07-20/ Past releases: https://vermaden.wordpress.com/news/ #verblog #vernews #news #bsd #freebsd #openbsd #netbsd #linux #unix #zfs #opnsense #ghostbsd #solaris #vermadenday