Hi!
I've got USB-flash (TakeMS 128), it was already partitioned, when i bought it. Under Windows it's automatically detected as second floppy (1.44 MB) drive and USB storage device (about 120 MB).
Under Linux i have no problem mounting biggest partition (/dev/sda1), but i've got no idea how to access the one that is size of a floppy disk?

Maybe the following will help (it's fdisk -l /dev/sda1 output):

Disk /dev/sda1: 124 MB, 124502016 bytes
16 heads, 32 sectors/track, 474 cylinders
Units = cylinders of 512 * 512 = 262144 bytes

Device Boot Start End Blocks Id System
/dev/sda1p1 ? 3749905 4813258 272218546+ 20 Unknown
Partition 1 has different physical/logical beginnings (non-Linux?):
phys=(356, 97, 46) logical=(3749904, 3, 15)
Partition 1 has different physical/logical endings:
phys=(357, 116, 40) logical=(4813257, 14, 19)
Partition 1 does not end on cylinder boundary.
/dev/sda1p2 ? 2598017 3650705 269488144 6b Unknown
Partition 2 has different physical/logical beginnings (non-Linux?):
phys=(288, 110, 57) logical=(2598016, 0, 11)
Partition 2 has different physical/logical endings:
phys=(269, 101, 57) logical=(3650704, 1, 10)
Partition 2 does not end on cylinder boundary.
/dev/sda1p3 ? 1052714 3783892 699181456 53 OnTrack DM6 Aux3
Partition 3 has different physical/logical beginnings (non-Linux?):
phys=(345, 32, 19) logical=(1052713, 10, 16)
Partition 3 has different physical/logical endings:
phys=(324, 77, 19) logical=(3783891, 3, 15)
Partition 3 does not end on cylinder boundary.
/dev/sda1p4 * 2723883 2723924 10668+ 49 Unknown
Partition 4 has different physical/logical beginnings (non-Linux?):
phys=(87, 1, 0) logical=(2723882, 2, 16)
Partition 4 has different physical/logical endings:
phys=(335, 78, 2) logical=(2723923, 13, 8)
Partition 4 does not end on cylinder boundary.

Partition table entries are not in disk order

'fdisk -l /dev/sda1' looks for a partition table WITHIN the first partition. This is why you get that awfully confusing output, because there is no partition table.

Try 'fdisk -l /dev/sda' to read the partition table from the whole block device.

fdisk -l /dev/sda displays the following:

Disk /dev/sda: 124 MB, 124518400 bytes
16 heads, 32 sectors/track, 475 cylinders
Units = cylinders of 512 * 512 = 262144 bytes

Device Boot Start End Blocks Id System
/dev/sda1 * 1 475 121584 6 FAT16

It still doesn't make any sense, where is the second partition?

According to fdisk, your drive has only one partition, that is ~128 MB in size. The partition /dev/sda1 occupies 124518400 bytes (475*262144), which is the size of your disk.

Under windows, are you certain this floppy disk corresponds to a partition on the drive? Is it possible that some software you installed with the disk created a "virtual floppy"?

I didn't installed any additional software under windows. The floppy drive appears on other computers as well with different versions of windows. I'm not sure, but i think it's a partition. I need to get access to it under linux, but i don't know how.

There is only one partition on the drive you showed me just now. Also, without special software, multiple partitions on a USB drive would just show up as more partitions under "removable media" in WinXP.

If so, where does the virtual floppy comes from every time?!

The only think I could think of would be the BIOS has a USB "Legacy Emulation" setting that allows you to boot from USB drives as if they were floppy disks.

But other USB flash doesn't behave in this way!

Then I am not sure what to tell you. What I can tell you is that your drive has only one partition on it, unless it has multiple LUNs, like a multi-card cardreader. If so, enable multi-LUN support in your kernel for that.

Hmmm...
Now it starts to make any sense, i'll try to work it out!
Thank You!