Hi Greg,
Thanks for the clarification! That was what I was looking for, the part about the need for explicitly stating the FS. Regards, SP On Tue, 13 Feb, 2024, 02:05 Gregory Nutt, <spudan...@gmail.com> wrote: > You would need to mount with -t vfat. That is how it the system knows > that the file system is vfat. > > It seems like you should be able to omit the file system type when > mounting and let the system figure out the file system type, but that > does not appear to be supported. > > On 2/12/2024 2:30 PM, Saurav Pal wrote: > > Hi Alan, > > > > Thanks for the reply. I had gone through that global array but I couldn't > > find what I was looking for. > > > > In a different phrasing, what I don't understand is how is it detected > > which file system was used to format a storage device. > > > > Like, let's say I have a HDD in my PC formatted with VFAT, and if I use > it > > with NuttX, how will it detect VFAT is being used? > > > > Magic numbers are unique for FSs, but I have not seen / missed where they > > are being stored on the disk for identification. > > > > Regards, > > SP > > > > On Tue, 13 Feb, 2024, 01:42 Alan C. Assis, <acas...@gmail.com> wrote: > > > >> Hi Saurav, > >> > >> Please take a look at "static const struct fsmap_t g_bdfsmap[]" in the > file > >> nuttx/fs/mount/fs_mount.c > >> > >> You will figure-out how the "magic" happens. > >> > >> Best Regards, > >> > >> Alan > >> > >> On Mon, Feb 12, 2024 at 9:20 AM Saurav Pal <resyfer....@gmail.com> > wrote: > >> > >>> Hi all, > >>> > >>> I am trying to write some docs for VFS in NuttX, but there's one thing > >> I've > >>> been stumbling on for some time. > >>> > >>> How are the file systems detected from the storage devices? For > example, > >> if > >>> I have a storage device which has been formatted using VFAT...after > (say) > >>> power on, how does NuttX detect that vfat was used to format the > storage > >>> device? > >>> > >>> From what I can see, NuttX does not have a "superblock" concept > >> explicitly > >>> defined, nor does it seem to require the file systems to store magic > >>> numbers in the disk in any way. > >>> > >>> Thanks in advance. > >>> Regards, > >>> SP > >>> >
