Sharing a bazzite game library to windows OS

Hi,
So I have dual boot Windows and Bazzite and think I might need to allocate more space to windows as there are some games I have on bazzite I want to put back into windows but was wondering instead of increased storage space can I share my library to windows?

Kasher_CS•7/31/24, 1:55 PM

https://github.com/maharmstone/btrfs

GitHub

GitHub - maharmstone/btrfs: WinBtrfs - an open-source btrfs driver ...

WinBtrfs - an open-source btrfs driver for Windows - maharmstone/btrfs

HikariKnight•7/31/24, 1:55 PM

if it is only steam games or emulators then btrfs.

HikariKnight•7/31/24, 1:56 PM

gamepass, epic, etc does not like btrfs apparently

HHikariKnight if it is __only__ steam games or emulators then btrfs.

Rhan121OP•7/31/24, 2:00 PM

It's PC steam games but added via Non Steam games option if that makes sense? So lutris install -> add non steam game

Kasher_CS•7/31/24, 2:00 PM

Should be fine I think

Kasher_CS•7/31/24, 2:01 PM

Not much you'd lose aside from time

Rhan121OP•7/31/24, 2:03 PM

I'll try it then but as a last resort incase it don't work is there a way I can re allocate storage to give windows more and decrease bazzite? Without having to remove bazzite and re allocate through window?

RRhan121 I'll try it then but as a last resort incase it don't work is there a way I can ...

HikariKnight•7/31/24, 2:04 PM

live usb and use a partition manager to resize both and potentially wait a good while as data is moved (also there is the risk of data loss and the partitions being broken)

once you start the process there is no going back without data loss until it is done

Original message was deleted

HikariKnight•7/31/24, 2:07 PM

yeah but he is shrinking the partition for bazzite so he needs to use a live usb

Rhan121OP•7/31/24, 2:08 PM

(sorry for all the questions)
so on the Winabtrf do I need to re partition my SSD to btrfs? I think it's NTFS atm

HikariKnight•7/31/24, 2:09 PM

it lets you read btrfs filesystems in windows

HikariKnight•7/31/24, 2:10 PM

and it is very important that you configure the winbtrfs permissions correctly as specified in the readme

Rhan121OP•7/31/24, 2:13 PM

So it's not as simple as clicking install on the btrfs.inf included in the zip file?

Rhan121OP•7/31/24, 2:14 PM

I'm just reading through the site and there's a lot on there and is a bit daunting to me cos it's like information overlaod if things I don't understand and don't want to break anything

RRhan121 So it's not as simple as clicking install on the btrfs.inf included in the zip f...

HikariKnight•7/31/24, 2:19 PM

it is that easy to install it but you want it to work with bazzite and not mangle things, meaning you need to tell it what permissions it has to use when writing/editing files on the system

HikariKnight•7/31/24, 2:19 PM

its as simple as running 1 command and adding 2 entries to your registry as mentioned in the readme

HikariKnight•7/31/24, 2:20 PM

https://github.com/maharmstone/btrfs?tab=readme-ov-file#mappings

GitHub

GitHub - maharmstone/btrfs: WinBtrfs - an open-source btrfs driver ...

WinBtrfs - an open-source btrfs driver for Windows - maharmstone/btrfs

HHikariKnight its as simple as running 1 command and adding 2 entries to your registry as ment...

Rhan121OP•7/31/24, 2:22 PM

Yeah I read this but it confused me because of all the commands and I didn't know which bit I need to follow

HikariKnight•7/31/24, 2:22 PM

you need the SID that belongs to your windows user

HikariKnight•7/31/24, 2:23 PM

and map that to UID 1000 and GID 1000 for winbtrfs

HikariKnight•7/31/24, 2:23 PM

it will make it place and edit files as your bazzite user (permissions wise)

HHikariKnight and map that to UID 1000 and GID 1000 for winbtrfs

Rhan121OP•7/31/24, 2:24 PM

Where does it say that in the readme

HikariKnight•7/31/24, 2:26 PM

https://github.com/maharmstone/btrfs?tab=readme-ov-file#mappings

GitHub

GitHub - maharmstone/btrfs: WinBtrfs - an open-source btrfs driver ...

WinBtrfs - an open-source btrfs driver for Windows - maharmstone/btrfs

HikariKnight•7/31/24, 2:26 PM

HikariKnight•7/31/24, 2:27 PM

for bazzite (and the vast majority of linux systems) if you want to use user permissions it will be uid 1000 and gid 1000

HikariKnight•7/31/24, 2:27 PM

by default winbtrfs does everything as root (uid and gid 0)
meaning if you launch a game and it edits its files

HikariKnight•7/31/24, 2:28 PM

grats you broke it on linux now and that 1 file can only be edited with sudo

Rhan121OP•7/31/24, 2:33 PM

Sorry you might need to dumb it down for me a bit further. I terms of what I need to is first go to
HKLM\SYSTEM\CurrentControlSet\services\btrfs\Mappings in windows?

But no idea what the Dword is? ....

Rhan121OP•7/31/24, 2:34 PM

Do I just look for SID like the example e.g. S-1-5-21-1379886684-2432464051-424789967-1001
And change the end 1001 to 1000?

HikariKnight•7/31/24, 2:38 PM

a dword is a file in regedit

Rhan121OP•7/31/24, 2:39 PM

At this point I'm honestly thinking is better just doing a KDE partition and shrinking the Linux size (but someone before mentioned it could break Linux as I might be removing something Linux needs)

HikariKnight•7/31/24, 2:39 PM

also literally on the line below the image if you read the instructions

You can find your current SID by running wmic useraccount get name,sid.

You can find your current SID by running wmic useraccount get name,sid.

not familiar with windows SIDs so not sure if they are identical on each system for the first user

Kasher_CS•7/31/24, 2:40 PM

Go to HKLM\SYSTEM\CurrentControlSet\services\btrfs\Mappings
Right click
It will allow you to create a new DWORD

KKasher_CS Go to HKLM\SYSTEM\CurrentControlSet\services\btrfs\Mappings Right click It will...

Rhan121OP•7/31/24, 2:43 PM

In Bazzite right?

Rhan121OP•7/31/24, 2:45 PM

I know it's a stupid question... Because it says "Create a DWORD with the name of your Windows SID" and sounds weird to create a new DWORD in windows using a winsows SID ...

RRhan121 In Bazzite right?

HikariKnight•7/31/24, 2:46 PM

in windows... this is a windows driver

Rhan121OP•7/31/24, 2:51 PM

so basically
Windows -> Go to HKLM\SYSTEM\CurrentControlSet\services\btrfs\Mappings
Right click
A create a new DWORD with my SID which will be found by running the CMD "wmic useraccount get name,sid"

But how does that map to GID and UID 1000?

Rhan121OP•7/31/24, 2:52 PM

Also I have no idea what GID and UID is to do that

RRhan121 Ah 😅 so basically Windows -> Go to HKLM\SYSTEM\CurrentControlSet\services\btrf...

Kasher_CS•7/31/24, 2:53 PM

Yes

Kasher_CS•7/31/24, 2:54 PM

Than click it again and type 1000 in the value

HikariKnight•7/31/24, 2:54 PM

that path is inside regedit

Kasher_CS•7/31/24, 2:54 PM

Wait

RRhan121 Ah 😅 so basically Windows -> Go to HKLM\SYSTEM\CurrentControlSet\services\btrf...

HikariKnight•7/31/24, 2:55 PM

it tells the btrfs driver that the user with the SID you provided is to be treated as if it is UID 1000 and GID 1000 in linux (meaning its the first user)

Kasher_CS•7/31/24, 2:55 PM

Don't type 1000 if its 0x something

Kasher_CS•7/31/24, 2:55 PM

Type 3E8 in that case

Kasher_CS•7/31/24, 2:56 PM

(By the way, just rebooted and installed it on windows to check)

Pryka•7/31/24, 2:56 PM

why just not share windows ntfs partition for games? steam supports it and it easier than messing with btrfs drivers on windows

PPryka why just not share windows ntfs partition for games? steam supports it and it ea...

HikariKnight•7/31/24, 2:57 PM

steam does actually not support it and it is actually not recommended as it requires hacky workarounds to work

Sharing a bazzite game library to windows OS

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