FDISK contre UUID

Bonjour,
j'ai un pb
je ne sais pas si une partition est vfat ou ext3 :
voici les résultats:

sudo fdisk -l /dev/sda

Disque /dev/sda: 80.0 Go, 80026361856 octets
255 têtes, 63 secteurs/piste, 9729 cylindres
Unités = cylindres de 16065 * 512 = 8225280 octets
Identifiant de disque : 0xe54ee54e

Périphérique Amorce Début Fin Blocs Id Système
/dev/sda1 1 4615 37069956 b W95 FAT32
/dev/sda4 4616 9729 41078205 5 Etendue
/dev/sda5 4616 7164 20474779+ 83 Linux
/dev/sda6 7165 9729 20603331 83 Linux

MAIS

sudo blkid /dev/sda[156]

/dev/sda1: UUID="cc642aed-b2a7-4e3a-a176-de54234ffb88" TYPE="ext3" SEC_TYPE="ext2"
/dev/sda5: UUID="003b5f4b-1f59-4c75-aff5-dcc7d767c4f6" TYPE="ext3" SEC_TYPE="ext2"
/dev/sda6: UUID="2273bfdc-ca05-414b-835d-12db3611df6d" TYPE="ext3" SEC_TYPE="ext2"

ls -al /dev/disk/by-uuid/ |grep sda

lrwxrwxrwx 1 root root 10 2009-08-24 22:30 003b5f4b-1f59-4c75-aff5-dcc7d767c4f6 -> ../../sda5
lrwxrwxrwx 1 root root 10 2009-08-24 22:30 2273bfdc-ca05-414b-835d-12db3611df6d -> ../../sda6
lrwxrwxrwx 1 root root 10 2009-08-24 23:12 cc642aed-b2a7-4e3a-a176-de54234ffb88 -> ../../sda1

sudo umount /dev/sda1 ; sudo mount -t vfat /dev/sda1 /media/a1 ; ls /media/a1 ; dmesg |tail

umount: /dev/sda1: n'est pas monté
mount : type erroné de syst .de fichiers, option erronée, super bloc
erroné sur /dev/sda1, codepage ou aide manquante ou autre erreur
Dans quelques cas certaines informations sont utiles dans syslog - essayez
dmesg | tail ou quelque chose du genre

[ 9529.996085] kjournald starting. Commit interval 5 seconds
[ 9529.996522] EXT3 FS on sda1, internal journal
[ 9529.996529] EXT3-fs: mounted filesystem with ordered data mode.
[ 9541.322165] kjournald starting. Commit interval 5 seconds
[ 9541.322502] EXT3 FS on sda1, internal journal
[ 9541.322509] EXT3-fs: mounted filesystem with ordered data mode.
[ 9568.631756] FAT: bogus number of reserved sectors
[ 9568.631763] VFS: Can't find a valid FAT filesystem on dev sda1.
[ 9580.580057] FAT: bogus number of reserved sectors
[ 9580.580068] VFS: Can't find a valid FAT filesystem on dev sda1.

sudo umount /dev/sda1 ; sudo mount -t ext3 /dev/sda1 /media/a1 ; ls /media/a1 ; dmesg |tail

umount: /dev/sda1: n'est pas monté
lost+found
[ 9541.322165] kjournald starting. Commit interval 5 seconds
[ 9541.322502] EXT3 FS on sda1, internal journal
[ 9541.322509] EXT3-fs: mounted filesystem with ordered data mode.
[ 9568.631756] FAT: bogus number of reserved sectors
[ 9568.631763] VFS: Can't find a valid FAT filesystem on dev sda1.
[ 9580.580057] FAT: bogus number of reserved sectors
[ 9580.580068] VFS: Can't find a valid FAT filesystem on dev sda1.
[ 9604.780058] kjournald starting. Commit interval 5 seconds
[ 9604.780492] EXT3 FS on sda1, internal journal
[ 9604.780500] EXT3-fs: mounted filesystem with ordered data mode.