I get a strange fdisk -l table:
Disk /dev/sda: 500.1 GB, 500107862016 bytes
255 heads, 63 sectors/track, 60801 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0x6fe0338e
Device Boot Start End Blocks Id System
/dev/sda1 * 1 26 203776 7 HPFS/NTFS
Partition 1 does not end on cylinder boundary.
/dev/sda2 26 31194 250360832 7 HPFS/NTFS
/dev/sda3 58787 60789 16076800 7 HPFS/NTFS
/dev/sda4 31195 58786 221632740 5 Extended
/dev/sda5 31195 32213 8185086 82 Linux swap / Solaris
/dev/sda6 32214 36123 31407043+ 83 Linux
/dev/sda7 36124 58786 182040516 83 Linux
Partition table entries are not in disk order
Disk /dev/sdb: 4040 MB, 4040724480 bytes
125 heads, 62 sectors/track, 1018 cylinders
Units = cylinders of 7750 * 512 = 3968000 bytes
Disk identifier: 0x6f20736b
This doesn't look like a partition table
Probably you selected the wrong device.
Device Boot Start End Blocks Id System
/dev/sdb1 ? 100405 247697 570754815+ 72 Unknown
Partition 1 has different physical/logical beginnings (non-Linux?):
phys=(357, 116, 40) logical=(100404, 79, 11)
Partition 1 has different physical/logical endings:
phys=(357, 32, 45) logical=(247696, 24, 51)
Partition 1 does not end on cylinder boundary.
/dev/sdb2 ? 21767 271577 968014120 65 Novell Netware 386
Partition 2 has different physical/logical beginnings (non-Linux?):
phys=(288, 115, 43) logical=(21766, 48, 47)
Partition 2 has different physical/logical endings:
phys=(367, 114, 50) logical=(271576, 60, 42)
Partition 2 does not end on cylinder boundary.
/dev/sdb3 ? 241276 491086 968014096 79 Unknown
Partition 3 has different physical/logical beginnings (non-Linux?):
phys=(366, 32, 33) logical=(241275, 3, 30)
Partition 3 has different physical/logical endings:
phys=(357, 32, 43) logical=(491085, 14, 39)
Partition 3 does not end on cylinder boundary.
/dev/sdb4 ? 372346 372354 27749+ d Unknown
Partition 4 has different physical/logical beginnings (non-Linux?):
phys=(372, 97, 50) logical=(372345, 119, 25)
Partition 4 has different physical/logical endings:
phys=(0, 10, 0) logical=(372353, 14, 33)
Partition 4 does not end on cylinder boundary.
Partition table entries are not in disk order
[root@localhost ~]#
So I will try some partition tools.
SOLVED: i used gparted and deleted, then made new partition table and a fat32 formatted partition.