Испортил разделы флешки виндовой программой. Исправил так
[root@school-server ~]# fdisk -l
Disk /dev/sda: 500.1 GB, 500106780160 bytes
255 heads, 63 sectors/track, 60801 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0x90909090
Device Boot Start End Blocks Id System
/dev/sda1 * 1 3279 26338536 5 Extended
/dev/sda2 3280 60801 462045465 83 Linux
/dev/sda5 1 2486 19968732 83 Linux
/dev/sda6 2487 3279 6369741 82 Linux swap / Solaris
Disk /dev/sdb: 2019 MB, 2019557376 bytes
63 heads, 62 sectors/track, 1009 cylinders
Units = cylinders of 3906 * 512 = 1999872 bytes
Disk identifier: 0x000109b5
Device Boot Start End Blocks Id System
/dev/sdb1 * 1 1 0 0 Empty
Partition 1 has different physical/logical beginnings (non-Linux?):
phys=(0, 0, 0) logical=(0, 0, 1)
Partition 1 has different physical/logical endings:
phys=(0, 0, 0) logical=(1099582, 0, 4)
Partition 1 does not end on cylinder boundary.
/dev/sdb2 * 1 1 0 0 Empty
Partition 2 has different physical/logical beginnings (non-Linux?):
phys=(0, 0, 0) logical=(0, 0, 1)
Partition 2 has different physical/logical endings:
phys=(0, 0, 0) logical=(1099582, 0, 4)
Partition 2 does not end on cylinder boundary.
/dev/sdb3 * 1 1 0 0 Empty
Partition 3 has different physical/logical beginnings (non-Linux?):
phys=(0, 0, 0) logical=(0, 0, 1)
Partition 3 has different physical/logical endings:
phys=(0, 0, 0) logical=(1099582, 0, 4)
Partition 3 does not end on cylinder boundary.
/dev/sdb4 * 1 1 0 0 Empty
Partition 4 has different physical/logical beginnings (non-Linux?):
phys=(0, 0, 0) logical=(0, 0, 1)
Partition 4 has different physical/logical endings:
phys=(0, 0, 0) logical=(1099582, 0, 4)
Partition 4 does not end on cylinder boundary.
[root@school-server ~]# fdisk /dev/sdb
Command (m for help): m
Command action
a toggle a bootable flag
b edit bsd disklabel
c toggle the dos compatibility flag
d delete a partition
l list known partition types
m print this menu
n add a new partition
o create a new empty DOS partition table
p print the partition table
q quit without saving changes
s create a new empty Sun disklabel
t change a partition's system id
u change display/entry units
v verify the partition table
w write table to disk and exit
x extra functionality (experts only)
Command (m for help): d
Partition number (1-4): 1
Warning: partition 1 has empty type
Command (m for help): d
Partition number (1-4): 2
Warning: partition 2 has empty type
Command (m for help): d
Partition number (1-4): 3
Warning: partition 3 has empty type
Command (m for help): d
Selected partition 4
Command (m for help): d
No partition is defined yet!
Command (m for help): m
Command action
a toggle a bootable flag
b edit bsd disklabel
c toggle the dos compatibility flag
d delete a partition
l list known partition types
m print this menu
n add a new partition
o create a new empty DOS partition table
p print the partition table
q quit without saving changes
s create a new empty Sun disklabel
t change a partition's system id
u change display/entry units
v verify the partition table
w write table to disk and exit
x extra functionality (experts only)
Command (m for help): n
Command action
e extended
p primary partition (1-4)
p
Partition number (1-4): 1
First cylinder (1-1009, default 1):
Using default value 1
Last cylinder, +cylinders or +size{K,M,G} (1-1009, default 1009):
Using default value 1009
Command (m for help): w
The partition table has been altered!
Calling ioctl() to re-read partition table.
Syncing disks.
[root@school-server ~]# fdisk -l
Disk /dev/sda: 500.1 GB, 500106780160 bytes
255 heads, 63 sectors/track, 60801 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0x90909090
Device Boot Start End Blocks Id System
/dev/sda1 * 1 3279 26338536 5 Extended
/dev/sda2 3280 60801 462045465 83 Linux
/dev/sda5 1 2486 19968732 83 Linux
/dev/sda6 2487 3279 6369741 82 Linux swap / Solaris
Disk /dev/sdb: 2019 MB, 2019557376 bytes
63 heads, 62 sectors/track, 1009 cylinders
Units = cylinders of 3906 * 512 = 1999872 bytes
Disk identifier: 0x000109b5
Device Boot Start End Blocks Id System
/dev/sdb1 1 1009 1970546 83 Linux
[root@school-server ~]# mkfs -t vfat /dev/sdb1
mkfs.vfat 2.11 (12 Mar 2005)
[root@school-server ~]#