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+id = 1754
+title = "QEMU wrongly requires SD card sizes to be a power of two"
+state = "opened"
+created_at = "2023-07-07T22:08:46.264Z"
+closed_at = "n/a"
+labels = []
+url = "https://gitlab.com/qemu-project/qemu/-/issues/1754"
+host-os = "Linux"
+host-arch = "x86"
+qemu-version = "8.0.50"
+guest-os = "Raspberry Pi OS"
+guest-arch = "ARM"
+description = """QEMU arbitrarily requires SD card sizes to be a power of 2. However, this behavior does not match the real world, and I am unable to pass a *physical* SD card into the guest operating system.
+```
+$ sudo qemu-system-aarch64 -M raspi2b -drive file=/dev/mmcblk0,if=sd,format=raw
+qemu-system-aarch64: Invalid SD card size: 29.7 GiB
+SD card size has to be a power of 2, e.g. 32 GiB.
+You can resize disk images with 'qemu-img resize <imagefile> <new-size>'
+(note that this will lose data if you make the image smaller than it currently is).
+```"""
+reproduce = """1. Insert a physical SD card into your host system and make a note of its device name. It will be something like `/dev/mmcblk0`
+2. Attempt to start a guest OS with the SD card attached. See the command above.
+3. You will get an error saying that the card size is not a power of two."""
+additional = """"""