A FAT16 partition (0x06) can be as large as 2 GiB
El 13/12/23 a les 12:23, Alberto Garcia ha escrit:
> On Wed, Dec 13, 2023 at 11:46:51AM +0100, lacsaP Patatetom wrote:
>> to quickly test my efi application `./esp/EFI/BOOT/BOOTX64.EFI`, I use the
>> following command `qemu-system-x86_64 -accel kvm -machine q35 -m 1024 -bios
>> /usr/share/edk2/x64/OVMF.fd -hda fat:./esp/ -snapshot` but it has recently
>> failed with the error message given in subject.
>
> I'm not familiar with the QEMU vvfat driver, but FAT16 does allow
> larger filesystems, I suspect there's a limitation there?
>
>> for various reasons, i can't purge/reinitailize/empty the folder :
>> what other options do I have with qemu or do I have to start from a
>> lighter folder ?
>
> You can create a FAT image, put your files there using e.g mtools and
> boot from that image:
>
> $ fallocate -l 1G esp.img
> $ mformat -i esp.img
> $ mcopy -i esp.img -s /path/to/files ::
>
> Berto
>
--
Narcis Garcia
4Gb also seems possible : maximum size depends on cluster size.
qemu probably uses 8Kb clusters, which limits the size to 512Mb.