When working with USB drive, the DiskPart command cannot select the partition of the USB disk:

C:\Users\Administrator>diskpart

Microsoft DiskPart version 6.1.7601 Copyright (C) 1999-2008 Microsoft Corporation. On computer: DIXINYAN-M17X

DISKPART> list disk

Disk ### Status Size Free Dyn Gpt -------- ------------- ------- ------- --- --- Disk 0 Online 931 GB 3072 KB Disk 1 Online 3726 GB 0 B * Disk 2 Online 1901 MB 0 B

DISKPART> select disk 2

Disk 2 is now the selected disk.

Disk 2 is a USD drive, select it:

DISKPART> list part

Partition ### Type Size Offset ------------- ---------------- ------- ------- * Partition 1 Primary 1901 MB 0 B

DISKPART> select part 1

There is no partition selected.

Somehow the partition cannot be selected and manipulated. After searching around, it seems the only solution to to recreate the partition with DiskPart:

DISKPART> clean

DiskPart succeeded in cleaning the disk.

DISKPART> create part primary

DiskPart succeeded in creating the specified partition.

DISKPART> list part

Partition ### Type Size Offset ------------- ---------------- ------- ------- * Partition 1 Primary 1901 MB 64 KB

Now Partition 1 can be selected:

DISKPART> select part 1

Partition 1 is now the selected partition.

DISKPART> active

DiskPart marked the current partition as active.

DISKPART> format fs=fat32 quick

100 percent completed

DiskPart successfully formatted the volume.