Arch Linux

efourseven

Member

Registered: 2005-07-03

Posts: 71

Unknown filesystem error [solved]

I just updated arch and now when I try to mount my usb harddrive I get this error:
# mount /mnt/usbdrive
mount: unknown filesystem type 'vfat'

Anyone know whats up?

Filosofem

Member

Registered: 2006-03-01

Posts: 28

Re: Unknown filesystem error [solved]

Hum, I'm not sure but is the "vfat" filesystem compiled in that kernel?  You can check that in you /boot/kconfig* file.  If not, you need to recompile it with support for that filesystem.

efourseven

Member

Registered: 2005-07-03

Posts: 71

Re: Unknown filesystem error [solved]

I just looked at my kconfig26 file and this is what I see...

#
# DOS/FAT/NT Filesystems
#
CONFIG_FAT_FS=m
CONFIG_MSDOS_FS=m
CONFIG_VFAT_FS=m
CONFIG_FAT_DEFAULT_CODEPAGE=437
CONFIG_FAT_DEFAULT_IOCHARSET="iso8859-1"
CONFIG_NTFS_FS=m
# CONFIG_NTFS_DEBUG is not set
CONFIG_NTFS_RW=y

Thanks for the reply.

efourseven

Member

Registered: 2005-07-03

Posts: 71

Re: Unknown filesystem error [solved]

Nevermind... I just rebooted the system and it works. I dont know what happend, but I'm happy now.

roadt

Member

Registered: 2007-10-18

Posts: 26

Re: Unknown filesystem error [solved]

I met the same problem. 

the key is that the kernel is updated ( e.g. from 2.23 -> 2.24 ).
the  vfat kernel module reside in difference directory (/lib/modules/XXXx-2.24/)after update.
but the kernel version in /proc  is the old one ,  until you reboot.

if you don't reboot, when load the vfat module, the insmod will search the  /lib/modules/`uname -r` , which can found nothing to load.  well,  what you get is nothing but some string like
# modprobe vfat
FATAL: Could not load /lib/modules/2.6.23-ARCH/modules.dep: No such file or directory.

so, you can understand why you are happy now.

NMigo

Member

Registered: 2012-05-03

Posts: 10

Re: Unknown filesystem error [solved]

too bad having to restart to be able to mount, I don't acostume to restart... there is always a hibernate/stand by option.
Any one with a trick to avoid restarting?

everything for the uptime!

Gcool

Member

Registered: 2011-08-16

Posts: 1,456

Re: Unknown filesystem error [solved]

Welcome to the forums.

When you upgrade your kernel, it's best practice to reboot soon after. If for some reason you can't, you're probably best off either postponing the kernel upgrade until you can or possibly consider running the linux-lts kernel (which doesn't get update so often, so no need to reboot).

PS: also try not bumping threads that are several years old.

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