Microsoft boosts Windows’ FAT32 partition size limit after nearly three decades

jeffw@lemmy.world to Technology@lemmy.world – 275 points –
Microsoft boosts Windows’ FAT32 partition size limit after nearly three decades
engadget.com
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This is badly written and ignorant article. Fat32 supports up to 16Tb partition size (depending on cluster size - 2Tb -16Tb).

Its microsoft's windows tools that arbitrarily only allow users to create 32Gb partitions, and it is this that is being changed. This is not a change to Fat32, this is a change to windows. 3rd party tools on Windows and other systems like Linux have long offered more options for partition size.

That its taken to 2024 for Microsoft to fix the command line tool (and still not fix the GUI tools) is ridiculous.

That's what I thought!

The real issue with Fat32 is the 4gb file size limit.

I love how the arstechnica article words it like you will never need FAT32 and it's silly to consider it.

I had to download fat32format I don't know how many times because I needed to format an extra large SD Card or USB drive for some device. Microsoft really shafted exFAT's adoption with their licensing.

FAT32 is also really simple to implement. Supporting exFAT may require a larger microcontroller with more memory, which results in a more expensive product.

FAT32 is the java of file systems. Works everywhere, on anything. But everyone hates it.

Even my speaker can read fat32, but I never format any storage in that system

I personally haven't had to touch it in over a decade, but I guess there's probably some uses for it still, yeah.

Personal computers and flagship phones? Yeah you can probably use exFAT.

Video game consoles and handhelds? Dashcams? Car entertainment centers? Cheap android devices? 100% going to be FAT32 partitioned with a Master Boot Record

Yep, many smart TVs still only accept FAT32 format. I have to split my HDR videos into multiple files to be able to watch them on TV — because of 4GiB size limit.

I think there was some kind of tool that let you extend it more. I had a 512gb drive on fat32 but it sucked so much I just reformated to ext4 and it performed much better

Yeah, GUIFormat can do that. Fat32 has its limitations, but I pretty much always use it as the stuff I use micro SD cards in, require it

Finally, Microsoft caught up to Linux.

Microsoft caught up to Linux.

They cannot even read (let alone write) any of the FOSS file systems used in Linux.

Thankfully. I wouldn't trust windows with a mounted foreign filesystem if I dual booted.

That’s an odd statement. I had an ext4 partition mounted on a Windows 11 machine just a week ago.

Natively somehow, or via LFS? If you have LFS set up, explorer lets you use it to mount Linux disks

Well, I was referring to Fat32. Probably shouldve stated that before lol. But yeah i absolutely agree.

Linux still unable to catch up with NTFS when it comes to filename length, sadly. 256 bytes in an era of Unicode is ridiculous.

NTFS also has a 255 limit, but it's UTF16, so for unicode, you will get more out of it. High price to pay for UTF16. Windows basically is moving stuff between UTF16 and ASCII all the time. Most apps are ASCII but Windows is natively UTF16. All other modernly maintained OS do UTF8, which "won" unicode.

The fact that all major Unix (not just Linux) filesystems are to 255 bytes says it's not a feature in demand.

I'd much rather have COW subvolume snapshotting and incremental backup of btrfs or zfs. Plus all the other things Linux has over Windows of course.

NTFS also has a 255 limit, but it’s UTF16, so for unicode, you will get more out of it.

I think this is a biased way of putting it. NTFS way is easy to understand and therefore manage. What's more important is that ASCII basically means English only. I've seen enough of such "discrimination" (stuff breaks etc.) based on used language in software/technology and it should end for good.

All other modernly maintained OS do UTF8, which “won” unicode.

UTF8 is Unicode. UTF8 symbols can take more than 1 byte.

Plus all the other things Linux has over Windows of course.

There are also encryption methods that slash maximum length of each filename even further.

Of course UTF8 is Unicode. The cool thing about UTF8 is that is ASCII, until it isn't. It cover all of Unicode, but doesn't need any bloat if you are just doing latin characters. Plus UTF8 will seamless go through ASCII code and things that understand it do, others just have patches of jibberish, but still work otherwise. It's a way better approach. Better legacy handling and more efficient packing for latin languages. Which is why it "won" out. UTF16 pretty much only exists in Windows because it's legacy it will be hard for it to escape.

LUKS is by far the most common encryption setup on Linux. It's done at block layer and the filesystem doesn't know about it. No effect of filename length, or anything else.

None of that helps or discards anything I've said above. But it allows to say that NTFS limit can be basically 1024 bytes. Just because you like what UTF-8 offers it doesn't solve hurdles with Linux limits.

LUKS is commonly used but not the only one.

Linus's VFS is where the 256 limit is hard. Some Linux filesystem, like RaiserFS, go way beyond it. If it was a big deal, it would be patched and widely spread. The magic of Linux, is you can try it yourself, run your own fork and submit patches.

LUKS is the one to talk about as the others aren't as good an approach in general. LUKS is the recommended approach.

Edit: oh and NTFS is 512 bytes. UTF16 = 16bit = 2 bytes. 256*2 = 512

The magic of Linux, is you can try it yourself, run your own fork and submit patches.

Well it should probably go further and offer more of another kind of magic - where stuff works as user expects it to work.

As for submitting patches, it sounds like you suggest people play around and touch core parts responsible for file system operations. Such an advice is not going to work for everyone. Open source software is not ideal. It can be ideal in theory, but that's it.

LUKS is the one to talk about as the others aren't as good an approach in general. LUKS is the recommended approach.

It looks like there are enough use cases where some people would not prefer LUKS.

I have lived quite happily, on pretty much only open source for over 12 years now. Professionally and at home (longer at home). Debian I put with Wikipedia as an example of what humans can be.

There is no gate keepers in who can do what where. Only on who will accept the patches. Projects fork for all kinds of reasons, though even Google failed to fork the Linux kernel. If there is some good patch to extend the filename limit, it will get in. Enough pressure and maybe the core team of that subsystem will do it.

Open source already won I'm affriad. Most of the internet, IoT to super computers, runs open source. Has been that way for a while. If you use Windows, fine, but it is just a consumer end node OS for muggels. 😉

If you setup a new install, and say you want encryption, LUKS is what you get.

Does it look like I advocate for windows? Nah.

Open source is great when it works. "If there is some good patch..." and "Enough pressure and maybe..." is the sad reality of it. Why would people need to put pressure on order for Linux to start supporting features long available in file systems it supports? Why would I, specifically, should spend time on it? Does Linux want to become an os for everyone or only for people experimenting with dangerous stuff that make them lose data sometimes?

Don't get me wrong, Linux is good even now. But there is no need to actively deny points of possible improvement. When they ask you how great XFS is compared to others you shouldn't throw "exbibytes" word, you should first think what problems people might have with it, especially if they want to switch from windows.

If you setup a new install, and say you want encryption, LUKS is what you get.

And if I want to only encrypt some files? I need to create a volume specifically for that, right? Or I could just use something else.

Open source clearly works because of the scale and breath of it's use. That's the modern world and its use is only increasing. This a good thing for multiple reasons.

Unicode filename length clearly isn't as big an issue as you feel or it would be fixed. There is some BIG money that could be spent to fix this for countries and companies who need unicode.

How you encrypt depends on your aim. If you aim is limit your character available for filenames, there are ways. If it's read only, you do a GPG tar ball. LUKS if you want a live system. You can just create a file, LUKS format it.

Resetup

sudo fallocate -l 1G test.img
sudo cryptsetup luksFormat --type luks2 test.img
sudo cryptsetup luksOpen test.img myplace
sudo mkfs.ext4 /dev/mapper/myplace
sudo mkdir /mnt/myplace
sudo mount /dev/mapper/myplace /mnt/myplace

close

sudo umount /mnt/myplace
sudo cryptsetup luksClose myplace

reopen

sudo cryptsetup luksOpen test.img myplace
sudo mount /dev/mapper/myplace /mnt/myplace

Basically the same as systemd-homed does for you: https://wiki.archlinux.org/title/Systemd-homed

But there are many ways. A good few filesystems offer folder/file encryption natively. Though I'd argue that's less secure.

clearly isn't as big an issue as you feel or it would be fixed.

I might have agreed with such statements 20 years ago. But not anymore. I can't count the times I've seen how certain software, game, system or a service literally brick themselves when a use case involves using non-ascii, non-english or non-unicode characters, paths or regions. Not Linux related only or specifically, but almost always it looks and feels embarrassing. I've seen some related global improvements in windows, NTFS, and some products, but all that is still not enough in my opinion. The thought that people shouldn't need >255 bytes (or symbols) sounds not different from that 640k ram quote.

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Linux might have a similar file name restriction, but what's more important IMO, is the obnoxious file path restrictions NTFS has.

Naming a file less than 255 chars is a lot easier than keeping its path down.

Limiting file name is one thing, but dealing with limited path lengths when trying to move a custies folder full of subdir on subdirs is obnoxious when the share name its being transferred to makes it just too long.

Can't you work around that with the extended length prefix of \\?\ (\\?\C:\whateverlongpathhere\)? Though admittedly, it is a pain in the ass to use.

(edited for clarity and formatting)

You can also enable long paths in w10/11 (30,000+ characters). Instructions are here:

https://learn.microsoft.com/en-us/windows/win32/fileio/maximum-file-path-limitation?tabs=registry

That would unfortunately require me to edit GPO I have non control over. I could temporarily knock it out with regedit but I don't know if it'd be tossed next gpupdate, I'd have to check.

Bummer. The '\?' prefix will work regardless of registry setting, though it's a pain to remember each time.

True. Problem is, moving from more restricted system to less restricted system is a breeze, but painful otherwise. Linux is in a position where it would benefit from any little thing. People trying to switch to Linux will find path length feels like an upgrade, but file name limitation is clearly a downgrade.

What are you guys naming your files anyways? No more than four words in lower snake case, as the Machine Spirit intended.

I guess something like ようこそ『追放者ギルド』へ ~無能なSランクパーティがどんどん有能な冒険者を追放するので、最弱を集めて最強ギルドを創ります~ 1 (ドラゴンコミックスエイジ) - 荒木 佑輔.epub - 92 characters, but 246 bytes. Where on Windows this file hits 35% of the limit, on Linux it hits 96%.

The file is not some rare case. It's from a torrent, uploaded somewhere just today. There are tons of files like this with slightly or much longer names. As of 2024, they can't be served by Linux. Not in a pure file form, that is.

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I don’t know how much it matters though? If I try it on my Windows XP machine I’ll still be stuck with the old limit right?

If someone still use win-dos, 4GB per file and 32GB partition cap is what they deserve.