| 3 Jan 2026 |
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| 4 Jan 2026 |
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 Tumble | could i use disko to format a qcow to test a config? | 12:40:46 |
 bandithedoge | yes:
https://github.com/nix-community/disko/blob/master/docs/interactive-vm.md
https://github.com/nix-community/disko/blob/master/docs/disko-images.md | 16:17:18 |
|  @josw:matrix.org left the room. | 18:03:43 |
| Tumble | do i have to create a system config? | 22:16:34 |
| 6 Jan 2026 |
|  zed joined the room. | 20:07:12 |
| zed | Hello there !
I'm new to disko (and nix/nixos in general 😓), and I was wondering if once I have a system setup with a certain layout with disko (let's say LVM, and then 2 LVs)...
changing the disk-config by adding an lv will be done incrementally or will destroy everything ? | 20:12:18 |
 lassulus | nothing will happen, the new things won't get applied. you need to run the format script manually if you want those changes to have an effect, but better check the script before running it, since that support is kinda undertested | 20:18:36 |
| zed | thanks, I'll check the script then :) | 20:19:58 |
| 8 Jan 2026 |
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| 10 Jan 2026 |
| Tumble | i want to make a singular disko.nix config with params, of {osDrive, homeDrive, zfsName, zfsCache, zfsDrives}, and depending on witch of these are defined or not, then produce a disko config, but i dont think i can have null drives or even remove properties from an attribe set | 11:24:21 |
| Tumble | wait maybe ++ could help | 11:27:08 |
| Tumble | i mean // | 11:27:30 |
| Tumble | ok good this might work | 11:30:33 |
| Tumble | 
Download clipboard.png | 11:30:35 |
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| Tumble | 
Download clipboard.png | 12:10:46 |
| Tumble | 
Download clipboard.png | 12:10:47 |
| Tumble | 
Download clipboard.png | 12:10:59 |
| Tumble | Woah, I was struggling with this last week, now I have a great starting point, amazing | 12:57:32 |
| 11 Jan 2026 |
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| 25 Apr 2024 |
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| 26 Apr 2024 |
 Raj | Couple of questions about NixOS live USBs:
I want to partition my 64 GB USB flash drive into two partitions (FAT32 live USB + ext4 storage), so I used the following disko config:
let
usb = "/dev/disk/by-id/usb-USB_SanDisk_3.2Gen1_0401a943ae4197a38a6f9070194e9ea2b3fb8dbb7997e05ed1b197c0e28946be4b8f000000000000000000001cf4be6800926418a955810751ab6336-0:0";
in {
disko.devices = {
disk = {
live = {
type = "disk";
device = usb;
content = {
type = "gpt";
partitions = {
ESP = {
type = "EF00";
device = "${usb}-part1";
priority = 0;
size = "8192M";
content = {
type = "filesystem";
format = "vfat";
};
};
storage = {
device = "${usb}-part2";
priority = 1;
size = "100%";
content = {
type = "filesystem";
format = "ext4";
};
};
};
};
};
};
};
}
I then copied over the files from the (minimal, non-graphical) NixOS live ISO into partition 1, hoping that the instructions on the Arch wiki would generalize to NixOS, but then my live ISO gets stuck with the following error message:
[...]
Timed out waiting for device /dev/root, trying to mount anyway
mounting /dev/root on /iso...
mount: mounting /dev/root on /mnt-root/iso failed: No such file or directory
An error occurred [...]
How can I use my USB flash drive as both a live USB and as a storage device? I found this relevant Discourse link but there was no resolution to the problem there.
I realize this might not be the best place to ask this, but I figured that folks here would have expertise configuring boot partitions correctly.
| 02:02:16 |
| Raj | * Couple of questions about NixOS live USBs:
I want to partition my 64 GB USB flash drive into two partitions (FAT32 live USB + ext4 storage), so I used the following disko config:
let
usb = "/dev/disk/by-id/usb-USB_SanDisk_3.2Gen1_0401a943ae4197a38a6f9070194e9ea2b3fb8dbb7997e05ed1b197c0e28946be4b8f000000000000000000001cf4be6800926418a955810751ab6336-0:0";
in {
disko.devices = {
disk = {
live = {
type = "disk";
device = usb;
content = {
type = "gpt";
partitions = {
ESP = {
type = "EF00";
device = "${usb}-part1";
priority = 0;
size = "8192M";
content = {
type = "filesystem";
format = "vfat";
};
};
storage = {
device = "${usb}-part2";
priority = 1;
size = "100%";
content = {
type = "filesystem";
format = "ext4";
};
};
};
};
};
};
};
}
I then copied over the files from the (minimal, non-graphical) NixOS live ISO into partition 1, hoping that the instructions on the Arch wiki would generalize to NixOS, but then my live ISO gets stuck with the following error message:
[...]
Timed out waiting for device /dev/root, trying to mount anyway
mounting /dev/root on /iso...
mount: mounting /dev/root on /mnt-root/iso failed: No such file or directory
An error occurred [...]
How can I use my USB flash drive as both a live USB and as a storage device? I found this relevant Discourse link but there was no resolution to the problem there.
I realize this might not be the best place to ask this, but I figured that folks here would have expertise configuring boot partitions correctly.
For reference, the NixOS manual says I should dd the ISO to the disk directly: sudo dd if=<path-to-image> of=/dev/sdX bs=4M conv=fsync
| 02:12:28 |
 tim | I don't think that this will work since you need to unmount the live USB to format it as storage device | 07:16:00 |
