Format USB Drives and SD Cards

How To Format USB Drives And SD Cards On LinuxThis article explains how to format a USB Drive or SD Card on Linux using the parted utility.It’s important to note that formatting is a destructive process, and it will erase all the existing data. If you have data on the UDB drive or the SD card, make sure you back it up.Before you can use an SD card or USB drive, it needs to be formatted and partitioned. Typically most USB drives and SD cards come preformatted using the FAT file system and do not need to be formatted out of the box. However, in some cases, you may need to format the drive.In Linux, you can use a graphical tool like GParted or command-line tools such as fdisk or parted to format the drive and create the required partitions. Installing partedGNU Parted is a tool for creating and managing partition tables. The parted package is pre-installed on most Linux distros nowadays. You can check if it is installed on your system by typing:parted --versionparted (GNU parted) 3.2 Copyright (C) 2014 Free Software Foundation, Inc. ... If parted is not installed on your system, you can install it using your distribution package manager. Install parted on Ubuntu and Debiansudo apt updatesudo apt install parted Install parted on CentOS and Fedorasudo yum install parted Identifying the USB or SD Card NameInsert the USB flash drive or SD card into your Linux machine and find the device name using the lsblk command:lsblkThe command will print a list of all available block devices:NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT ... sdb 8:16 1 14.4G 0 disk └─sdb1 8:17 1 1.8G 0 part /media/data ... In the example above, the name of the SD device is /dev/sdb, but this may vary on your system.You can also use the dmesg command to find the device name:lsblkOnce you attach the device, dmesg will show the device name:... sd 1:0:0:0: 30218842 512-byte logical blocks: (15.5 GB/14.4 GiB) ... Securely Wipe Up the Data (Optional)Before formatting the drive, you can securely wipe out all the data on it by overwriting the entire drive with random data. This ensures that the data cannot be recovered by any data recovery tool.You need to completely wipe the data only if the device is going to be given away. Otherwise, you can skip this step.Be very careful before running the following command and irrevocably erase the drive data. The of... part of the dd command must point to the target drive.sudo dd if/dev/zero of/dev/sdb bs4096 statusprogressDepending on the size of the drive, the process will take some time to complete.Once the disk is erased, the dd command will print “No space left on device”:15455776768 bytes (15 GB, 14 GiB) copied, 780 s, 19.8 MB/s dd: error writing '/dev/sdb': No space left on device 3777356+0 records in 3777355+0 records out 15472047104 bytes (15 GB, 14 GiB) copied, 802.296 s, 19.3 MB/s Creating a Partition and FormattingThe most common file systems are exFAT and NTFS on Windows, EXT4 on Linux, and FAT32, which can be used on all operating systems.We will show you how to format your USB drive or SD card to FAT32 or EXT4. Use EXT4 if you intend to use the drive only on Linux systems, otherwise format it with FAT32. A single partition is sufficient for most use cases. Format with FAT32First, create the partition table by running the following command:sudo parted /dev/sdb --script -- mklabel msdosCreate a Fat32 partition that takes the whole space:sudo parted /dev/sdb --script -- mkpart primary fat32 1MiB 100%Format the boot partition to FAT32:sudo mkfs.vfat -F32 /dev/sdb1mkfs.fat 4.1 (2017-01-24) Once done, use the command below to print the partition table and verify that everything is set up correctly:sudo parted /dev/sdb --script printThe output should look something like this:Model: Kingston DataTraveler 3.0 (scsi) Disk /dev/sdb: 15.5GB Sector size (logical/physical): 512B/512B Partition Table: msdos Disk Flags: Number Start End Size Type File system Flags 1 1049kB 15.5GB 15.5GB primary fat32 lba That’s all! You have formatted your device. Format with EXT4Create a GPT partition table by issuing:sudo parted /dev/sdb --script -- mklabel gptRun the following command to create a EXT4 partition that takes the whole space:sudo parted /dev/sdb --script -- mkpart primary ext4 0% 100%Format the partition to ext4:sudo mkfs.ext4 -F /dev/sdb1mke2fs 1.44.1 (24-Mar-2018) /dev/sdb1 contains a vfat file system Creating filesystem with 3777024 4k blocks and 944704 inodes Filesystem UUID: 72231e0b-ddef-44c9-a35b-20e2fb655b1c Superblock backups stored on blocks: 32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208 Allocating group tables: done Writing inode tables: done Creating journal (16384 blocks): done Writing superblocks and filesystem accounting information: done Verify it by printing the partition table:sudo parted /dev/sdb --script printThe output should look something like this:Model: Kingston DataTraveler 3.0 (scsi) Disk /dev/sdb: 15.5GB Sector size (logical/physical): 512B/512B Partition Table: gpt Disk Flags: Number Start End Size File system Name Flags 1 1049kB 15.5GB 15.5GB ext4 primary ConclusionFormatting a USB drive or SD card on Linux is a pretty straightforward process. All you need to do is insert the drive, create a partition table, and format it with FAT32 or your preferred file system.

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