id = 1360
title = "Starting using WSL fails even if the same image is valid when starting qemu directly from windows"
state = "opened"
created_at = "2022-12-09T02:18:52.578Z"
closed_at = "n/a"
labels = ["Storage"]
url = "https://gitlab.com/qemu-project/qemu/-/issues/1360"
host-os = "Windows 11 Home 21H2, Ubuntu 20.04.4 LTS on Windows 10"
host-arch = "x86"
qemu-version = "QEMU emulator version 7.1.94 (v7.2.0-rc4-11947-g2dabd50cfb-dirty)"
guest-os = "n/a"
guest-arch = "n/a"
description = """I'm trying to follow a rust tutorial on writing a custom OS in rust. https://os.phil-opp.com/minimal-rust-kernel/
The problem occurse when trying to run qemu from wsl. If I run qemu from a windows command line everything works as expected. 
If I run the os calling qemu (installed on windows) from wsl it fails with 

```
ERROR:../../../block.c:1715:bdrv_open_driver: assertion failed: (is_power_of_2(bs->bl.request_alignment))
Bail out! ERROR:../../../block.c:1715:bdrv_open_driver: assertion failed: (is_power_of_2(bs->bl.request_alignment))
```

I also found an old bug report that seemed to be the same issue in the old issue tracker: https://bugs.launchpad.net/qemu/+bug/1893807"""
reproduce = """1. Sample code can be found at `https://github.com/phil-opp/blog_os` branch: `post-02`
2. create wsl environment
3. run `cargo install bootimage` only required on the once to install bootimage
4. run `cargo build`
5. run `cargo bootimage` to create the image
6. `qemu-system-x86_64 -drive format=raw,file=target/x86_64-blog_os/debug/bootimage-blog-os.bin`"""
additional = "n/a"