this post was submitted on 08 Aug 2024
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Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).

Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.

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I want to learn more about file systems from the practical point of view so I know what to expect, how to approach them and what experience positive or negative you had / have.

I found this wikipedia's comparison but I want your hands-on views.

For now my mental list is

  • NTFS - for some reason TVs on USB love these and also Windows + Linux can read and write this
  • Ext4 - solid fs with journaling but Linux specific
  • Btrfs - some modern fs with snapshot capability, Linux specific
  • xfs - servers really like these as they are performant, Linux specific
  • FAT32 - limited but recognizable everywhere
  • exFAT - like FAT32 but less recognizable and less limited
all 33 comments
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[–] juliusspencer@friendica.eskimo.com 1 points 14 hours ago* (last edited 14 hours ago)

How well a file system recovers from crashes or corruption.
fall guys

[–] data1701d@startrek.website 0 points 3 months ago (1 children)

NTFS support is pretty solid on Linux these days, but just so you know, never use it as a root partition.

I have generally used ext4. There's ways to massage it to mount on Windows, as with btrfs. Ext4 is very likely what you should do if you're installing Linux for the first time, as it has had decades of testing and is rather battle-tested

I recently did my first btrfs install. For now, I've had no issues. Of course, some could happen, but I've generally heard btrfs is fine these days. One of its cool things is native compression support, although I forgot to enable it when I did that install.

I've never used XFS.

FAT32 should be rarely used these days due to file size limits and file name limits. The only place where it should still be used is for your EFI partition.

Now exFAT really isn't that unrecognizable. It's supported by pretty much every operating system these days. It's definitely not for root partitions, but should be your default for flash drives and portable hard drives.

On another note, I recently tried Bcachefs on Debian Testing on a random old Chromebook. It is still in development, and not all distros support it yet, but I liked what I saw from my limited experience. It also supports snapshots, and unlike btrfs, has native encryption. For now, just ignore it, but like many in this post have said, keep an eye out for it.

As for ZFS, I've never tried it. The main caveat is due to licensing incompatibility, it is not in the standard Linux kernel and you have to do some special stuff.

[–] Psyhackological@lemmy.ml 0 points 3 months ago (1 children)

Great answer thanks for this!

I agree with everythinf but exFAT, some devices expect either FAT32 or NTFS. I had this issue when I wanted to play totally acquired big mkv movie through USB and because of that FAT32 wasn't an option so I went with exFAT. Not visible but apperantly it liked NTFS. It was the LG TV, my parents have 2 and same issue on both.

[–] data1701d@startrek.website 0 points 3 months ago (1 children)

My pleasure. The LG problem is unfortunate. Most other devices tend to support exFAT, but LG is an exception, albeit a very big one due to its pervasiveness as a brand. I do have an LG TV, but an older one that’s getting annoying to the point it’s tempting to throw a Roku behind it. Also, do you have a laptop with HDMI? That could also be a solution.

[–] data1701d@startrek.website 0 points 3 months ago (1 children)

Also, for context, part of my exFAT leanings are that while NTFS is read-only on Mac, exFAT is read-write. I’d presume as I am, you’re not a frequent Mac user, but I’ve had situations in the past where I had to use one.

[–] Psyhackological@lemmy.ml 0 points 3 months ago (1 children)

I saw it too. I dislike Mac but when I'm forced to be around them I'm trying to make them work as they should. The problem is for me they are more closed and hostile to this than Windows but that's probably because I was a Windows user so much time.

[–] data1701d@startrek.website 0 points 3 months ago (1 children)

I have similar feelings about Mac, probably in part because of my former Windows use as well. On one hand, I like how Mac’s terminal and development workflow (e.g availability of gcc) are more natively Unix-like, but for that, there’s also limited OpenGL support and no Vulkan support. Meanwhile, making Windows more “Unix-y” is as simple as installed Cygwin, and fixing the menu is simple a matter of installing OpenShell. (Of course, having to contort Windows gets annoying after a while, thus why I use Linux these days.)

[–] Psyhackological@lemmy.ml 0 points 3 months ago (1 children)

Yeah let's skip the part that average Mac consumer that I know does not know terminal is. 😆 But it was a bizzare to me when someone could extract the zip archive from the GUI but I helped through terminal.

[–] data1701d@startrek.website 0 points 3 months ago (1 children)

Honestly, just strike out Mac. I one time opened the Windows Command Prompt in front of someone and they were like “DOS?” 😂

[–] Psyhackological@lemmy.ml 0 points 3 months ago (1 children)

Do that on Linux, update your packages in the café and you can be banished from it as a hacker.

[–] data1701d@startrek.website 1 points 3 months ago (1 children)

Solution 1: Use Synaptic while in the cafe.

Solution 2: If I’m going to get called a hacker (or cracker, if you’re some dude from the FSF), might as well earn it.

[–] Psyhackological@lemmy.ml 1 points 3 months ago

Ia Synapthic up-to-date?

I joke about being hacker when I share my screen and run long Ansible playbooks.

[–] ikidd@lemmy.world 0 points 3 months ago (1 children)

ZFS on anything storage related. Enterprise level snapshot and replica management.

[–] Psyhackological@lemmy.ml 0 points 3 months ago (1 children)

How's it better than XFS? I heard same things about it too.

[–] ikidd@lemmy.world 0 points 3 months ago (1 children)

ZFS is completely different than XFS. XFS is like a better (different?) ext4. ZFS is an error-checking software raid COW filesystem that does snapshots and can have multiple replicas, both local and remote. It uses zvols and datastores. Think btrfs on steroids and with a working raid subsystem.

It's got a weird semi-closed license because Oracle is involved but it's never been enforced and at this point is in such widespread use in large and small enterprises that it would be impossible to enforce.

[–] theroff@aussie.zone -1 points 3 months ago

OpenZFS is under a completely FOSS license but it's incompatible with the GPL and can't really ever be merged into the Linux kernel. The workaroundids to provide it as source code which gets compiled as a module every time there's a new kernel via dkms.

More controversially, Canonical ship OpenZFS pre-compiled in Ubuntu which some lawyers believe to be infringing on ZFS' codebase.

Honestly the OpenZFS situation on Linux is probably the biggest single reason for the growing interest in btrfs and bcachefs, the former slowly becoming default on more Linux distros over time and lots of investment from SUSE and Facebook AFAIK.

[–] ryannathans@aussie.zone 0 points 3 months ago (1 children)

ZFS where possible for maximum reliability

It also has self healing, no "partitions", high performance, compression, smart drive redundancy without RAID holes, encryption, deduplication and an extremery intelligent cache called ARC

[–] Psyhackological@lemmy.ml 0 points 3 months ago* (last edited 3 months ago) (1 children)

Holy xfs is probably not close to that?

[–] non_burglar@lemmy.world 0 points 3 months ago (1 children)

XFS is simply a journalling filesystem.

ZFS is a COW filesystem and volume manager with compression, block management, and an adaptive read cache.

Kind of an apples-to-oranges comparison.

[–] theroff@aussie.zone -1 points 3 months ago

Technically XFS is also a CoW filesystem, but it doesn't have the vast array of features that ZFS does like volume management, snapshots, send/recv etc. It does have reflink support which I guess is a kind of snapshot for a file.

[–] thejevans@lemmy.ml 0 points 3 months ago (1 children)

ZFS all the things. On my workstations, I wipe / on every boot except for the files that I specify, and I backup /home to my NAS on ZFS and I backup my NAS snapshots to Backblaze.

[–] dataprolet@lemmy.dbzer0.com -1 points 3 months ago

Why do you wipe your root dir?

[–] avidamoeba@lemmy.ca 0 points 3 months ago* (last edited 3 months ago) (1 children)

Ext4 and ZFS.

  • Ext4 for system disks because it's default in OS installers and it works well. I typically use it on top of LVMRAID (LVM-managed mdraid) for redundancy and expansion flexibility.
  • ZFS for storage because it's got data integrity verification, trivial setup, flexible redundancy topologies, free snapshots, blazing fast replication, easy expansion, incredible flexibility in separating data and performance tuning within the same filesystem. I'd be looking into setting up ZFS on root for my next machine. Among other things that would enable trivial and blazing fast backup of the system while it's running - as simple as syncoid -r rpool backup-server:machine4-rpool.
[–] pressanykeynow@lemmy.world -1 points 3 months ago (1 children)

I'd be looking into setting up ZFS on root for my next machine

I too was on the path of adventure once but then the kernel module hasn't been built after the upgrade. Also btrfs offers some nice features for root especially that zfs doesn't have.

[–] avidamoeba@lemmy.ca 0 points 3 months ago (1 children)

It's one of the reasons I use Ubuntu LTS, the ZFS module is bundled by default.

Also btrfs offers some nice features for root especially that zfs doesn’t have.

Oh? Elaborate pls.

[–] pressanykeynow@lemmy.world -1 points 3 months ago (1 children)

You can boot straight into snapshot, may be useful if an update went wrong or you don't like new kde.

You can change drives and raid configuration online. For example I bought a laptop that had windows preinstalled, so I used the second half of the disk space for linux, then I figured I don't need windows so I formatted windows partition to btrfs, added it as a new device, moved all the data there, deleted the old linux partition and extended the new one to the whole drive, all that easy and without reboot.

[–] avidamoeba@lemmy.ca 1 points 3 months ago

Oh nice. I think that all of those are possible with ZFS too. Although I'm pretty sure that the snapshot-boot is done outside of ZFS itself. As in, there's something else that takes the snapshots and makes them available to the bootloader. I think zsys used to do that in the experimental ZFS-on-root support that shipped in Ubuntu 20.04. I recall having a snapshot appear before every update and those snapshots were selectable from GRUB.

[–] delirious_owl@discuss.online 0 points 3 months ago (1 children)

ext4 because its the default and works fine

[–] Psyhackological@lemmy.ml 0 points 3 months ago (1 children)

Never doubted it. Do you use journaling feature on it?

[–] Empricorn@feddit.nl 0 points 3 months ago (1 children)

Wasn't that the entire purpose of ext4 vs ext3? As the default, I also keep journaling on for ext4 partitions. Even /boot.

[–] theroff@aussie.zone -1 points 3 months ago

ext3 had journaling, but not ext2. Also ext3 doesn't really exist anymore as it was merged into the ext4 driver which can read the old format.

[–] dataprolet@lemmy.dbzer0.com -1 points 3 months ago

Btrfs, but I'm curious about ZFS.