Master Linux Disk Management: Partition, Format, and Mount Like a Pro

Introduction

Disk management is a core skill for Linux administrators. Proper partitioning, formatting, and mounting ensure efficient use of storage and reliable data access.

1. Basic Concepts

Partitioning divides a physical disk into logical sections called partitions. Devices appear under /dev (e.g., /dev/sda, /dev/sda1). For disks smaller than 2 TiB you can use MBR; larger disks require GPT.

2. Partitioning Tools

fdisk (MBR)

Install:

sudo apt-get -y install fdisk   # Ubuntu

sudo yum -y install fdisk       # CentOS

Basic commands: fdisk -l – list disks and partitions fdisk /dev/sdb – start interactive session d – delete a partition n – create a new partition w – write changes

Example: create a 2 GiB primary partition on /dev/sdc:

fdisk /dev/sdc
n
p
1
2048
+2G
w

gdisk (GPT)

Install:

sudo apt-get -y install gdisk   # Ubuntu

sudo yum -y install gdisk       # CentOS

Key commands: b – backup GPT data n – add a partition w – write table q – quit without saving

Example: add a 1 GiB partition on /dev/sdf:

gdisk /dev/sdf
n
1
2048
+1G
w

3. Formatting Filesystems

After partitioning, create a filesystem with mkfs. Common commands: mkfs -t ext4 /dev/sdx1 List supported types:

mkfs [tab][tab]
# shows ext2 ext3 ext4, vfat, ntfs, etc.

Example creating an ext3 filesystem with a label:

mkfs.ext3 -L demoTest /dev/vdb1

4. Inspecting Filesystems

Useful commands: blkid /dev/sdx1 – show UUID and label tune2fs -l /dev/sdx1 – detailed ext* info dumpe2fs /dev/sdx1 – low‑level superblock data

5. Mounting Devices

Mount a filesystem to an empty directory:

mkdir /mnt/mydisk
mount -t ext4 /dev/vdb1 /mnt/mydisk

Common mount options (comma‑separated after -o): ro / rw – read‑only / read‑write noatime – don’t update access time sync – synchronous writes

Example read‑only mount with logging:

mount -vrt ext2 -o sync,noatime /dev/vdb1 /mnt/game

Verify with df -h or mount -l. To unmount:

umount /mnt/game

6. Automatic Mounts via /etc/fstab

Add entries to /etc/fstab to mount at boot. Format:

<device|UUID|LABEL>  <mountpoint>  <fstype>  <options>  <dump>  <pass>

Example:

/dev/vdb1    /mnt/game    ext2    auto,ro    0    0
LABEL=shebeiB    /mnt/videos    ext3    auto,rw    0    0
UUID=a14f72f0-d450-473a-aaa2-4f2b811b0500  /mnt/music  ext4  noauto,rw  0  0

After editing, run mount -a to apply.

7. Special Mount Cases

ISO Images

mount -vo loop /path/to/image.iso /mnt/iso

Windows Shares (CIFS/SMB)

mount -t cifs -o username=USER,password=PASS //192.168.0.144/images /mnt/windows_share

Conclusion

By mastering partitioning tools (fdisk, gdisk), filesystem creation (mkfs), inspection utilities (blkid, tune2fs, dumpe2fs), and mounting procedures (manual, fstab, special devices), you can confidently manage Linux storage for a wide range of scenarios.