9front is probably using a completely diferent loading chain, but 2048 could be correct if they use a similar or related approach.
On Sun, Feb 16, 2025, 18:44 Gorka Guardiola <pau...@gmail.com> wrote: > I haven't used native plan 9 for a long time, but, in case it helps, 2048 > used to be the blocksize in USB booting (from CDROMs, this was all using El > Torito standard when I wrote the bootloader ages ago). I think USB didn't > care but CDROMs did. > > On Sun, Feb 16, 2025, 16:51 <tlaro...@kergis.com> wrote: > >> As indicated in another message, I'm trying to install Plan9 (9front) >> on an AM08Pro, that is a ACEMAGICIAN with an AMD Ryzen 9 8cores, 16 Gb >> of memory, and a 512Gb NVMe disk (M.2). >> >> Before attempting to PXE boot (that should work) I'm trying to >> understant why an USB thumb does not work. >> >> I have installed an UEFI Shell (that has to be called Shellx64.efi >> despite the "Shell.efi" mentionned in the BIOS menu) in the Windows >> EFI system partition. From the BIOS menu, I can select "try to run an >> UEFI shell found in one of the filesystems" to explore the board. >> >> Concerning USB, there are 3.0, 3.1 and 3.1 USB-C ports (even Windows >> fail to recognize some USB devices depending on where they are put, >> and it seems that connecting a keyboard+touchpad combo, that uses one >> connector, but two instances, invalidates the next USB connector; so >> the whole USB stuff looks suspiciously fragile). >> >> Nonetheless, an USB thumb (as well as a CDROM connected via an USB >> connector) is recognized as CDROM(0x1). >> >> I think this may be the problem: the firmware is using 2048 blocks >> (ISO9660 FS) while the information in the MBR table relates to 512 >> blocks. With BIOS allowing legacy compatibility, this may perhaps work >> (MBR make the booting switch to 512 bytes blocks), but this will not >> if the block size is fixed as 2048? >> >> I haven't look at the UEFI code, but does this ring a bell for someone? >> -- >> Thierry Laronde <tlaronde +AT+ kergis +dot+ com> >> http://www.kergis.com/ >> http://kertex.kergis.com/ >> Key fingerprint = 0FF7 E906 FBAF FE95 FD89 250D 52B1 AE95 6006 F40C ------------------------------------------ 9fans: 9fans Permalink: https://9fans.topicbox.com/groups/9fans/Te2a9c6fe778e83f5-M02bea7ead6ea11ca8d3008a7 Delivery options: https://9fans.topicbox.com/groups/9fans/subscription
