[parted-devel] Why i can not format FAT32 type?

[baul tan]

Hi all

I want to format my external U disc to FAT32,but the cmd 'mkfs -t vfat -F 32
/dev/sda' does not work,as follow:

[root at localhost linux-2.6.20.6]# mkfs -t vfat -F 32  /dev/sda
mkfs.vfat 2.11 (12 Mar 2005)
mkfs.vfat: Will not try to make filesystem on full-disk device '/dev/sda'
(use -I if wanted)
[root at localhost linux-2.6.20.6]#

when  I added the option -I ,seems OK. as follow:

[root at localhost linux-2.6.20.6]# mkfs -t vfat -F 32 -I /dev/sda
mkfs.vfat 2.11 (12 Mar 2005)
[root at localhost linux-2.6.20.6]#

But I can not mount the device '/dev/sda',as follow:

[root at localhost linux-2.6.20.6]# mount /dev/sda /home/tbiao/mntpoint/
mount: /dev/sda: can't read superblock
[root at localhost linux-2.6.20.6]#

Would you give me some help?
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