Hi,
I am a newbie of Linux. And when I try to use 'mount -t vfat /dev/sda1 /mnt' in STLinux, I got the error as titled. Below is the print of 'cat /proc/filesystems'. I don't know why there is a 'lfat' instead of 'vfat'. Also I don't know whether this is something related to this issue. Please help me. Thank you in advanced.
nodev sysfs
nodev rootfs
nodev bdev
nodev proc
nodev sockfs
nodev usbfs
nodev pipefs
nodev anon_inodefs
nodev futexfs
nodev tmpfs
nodev inotifyfs
nodev devpts
reiserfs
ext3
ext2
cramfs
nodev ramfs
lfat
iso9660
nodev nfs
nodev smbfs
ntfs
nodev jffs2
romfs
nodev fuse
fuseblk
nodev fusectl
udf
jfs
nodev rpc_pipefs

Well I too am not sure about 'lfat', but your output would mean that your kernel does not support that file system.
You can check with:
You should get no output from the above which means you will need to recompile your kernel and add it in.

the output is as below.
CONFIG_VFAT_FS=y
CONFIG_VFAT_NO_CREATE_WITH_LONGNAMES=y
It is weird.

hmmm ... it is curious. I unfortunately do not know much about this distribution What happens if you try to mount
the drive without specifying a type? Also, are you sure it is in fact a vfat formatted drive?

grail suggested:
"are you sure it is in fact a vfat formatted drive?"

I'm guessing that is your problem. You haven't said what is on /dev/sda1, but if it is windows it is probably ntfs instead of vfat. If that's the case you will need another package to be able to access it.

You can discover what it is by running gparted (might be in your distro, or might need to download it, or run it from a live cd that has it. Be careful with it. It will give yo the information, but it is a powerful program that can mess up your system if you con't read the directions.

You can run fdisk -l and see what kind of system does the partition have