Partitioning and formatting of poisoned USB flash disks in linux

Linux partitioning and formatting of poisoned USB disks-general Linux technology-Linux technology and application information. The following is a detailed description. Original person: a3563

The USB flash drive is 4 GB, which is divided into two zones, namely 2 GB. One partition is invisible in "My Computer" under windows, but can be seen in disk management, but cannot be formatted without a drive letter. In FC6, run the command fdisk-l to view the two partitions/dev/sda1/dev/sda2, but one of the partitions cannot be mounted.

I will back up the items in the partition and prepare to repartition and format it. The procedure is as follows:

Fdisk/dev/sda // re-create a partition table for the U Disk

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): w // Save the changes and exit

Fdisk/dev/sda // prepare to pull the partition

Command (m for help): n // create a new partition
There are two options: e and p e are extended partitions, and p is the primary partition. We need to select the primary partition. Otherwise, an error will occur (I chose e as an error)

I want to use the default one for each partition.

Command (m for help): w // Save the changes and exit

In this case, the partition table has been created. Start formatting now.

I want to format it to FAT32 format

Mkfs. vfat-I-O USB/dev/sda1

The formatting is complete.

By the way, I didn't format it at last. It can be identified as 4G capacity, but it can only use 2G.