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Disk Mounting Guide

Permanent disk mounting configuration for Linux systems

Prerequisites

  • Root/sudo access
  • Target disk identified (/dev/sdX)
  • Filesystem already created on the disk

Workflow

flowchart LR
    A[Identify Disk] --> B[Get UUID]
    B --> C[Create Mount Point]
    C --> D[Edit fstab]
    D --> E[Test Mount]
    E --> F[Reboot Verify]

Step-by-Step Guide

1. Identify Available Disks

# List all block devices
sudo lsblk

# Show detailed disk information
sudo fdisk -l

# Show disk partitions with filesystem types
lsblk -f

2. Get Disk UUID

# Get UUID for specific disk
sudo blkid /dev/sdX1

# Example output:
# /dev/sdb1: UUID="a1b2c3d4-5678-90ab-cdef-1234567890ab" TYPE="ext4"

3. Create Mount Point

# Create directory for mounting
sudo mkdir -p /mnt/data

# Or use descriptive name
sudo mkdir -p /mnt/storage

4. Configure Permanent Mount

Edit /etc/fstab:

sudo nano /etc/fstab

Add entry:

# Format: UUID=<uuid> <mount-point> <type> <options> <dump> <pass>
UUID=a1b2c3d4-5678-90ab-cdef-1234567890ab /mnt/data ext4 defaults 0 2

One-liner:

echo "UUID=a1b2c3d4-5678-90ab-cdef-1234567890ab /mnt/data ext4 defaults 0 2" | sudo tee -a /etc/fstab

5. Test the Configuration

# Test fstab without reboot
sudo mount -a

# Verify mount
df -h | grep /mnt/data

# Check mount details
mount | grep /mnt/data

Mount Options Reference

Option Description
defaults rw, suid, dev, exec, auto, nouser, async
noatime Don't update access time (performance)
nofail Don't fail boot if device missing
ro Read-only
rw Read-write
user Allow non-root users to mount
x-systemd.automount Mount on first access

Common Configurations

SSD/NVMe (performance): 

UUID=xxx /mnt/ssd ext4 defaults,noatime,discard 0 2

Network share (NFS): 

server:/share /mnt/nfs nfs defaults,nofail 0 0

External drive (optional): 

UUID=xxx /mnt/external ext4 defaults,nofail,x-systemd.automount 0 2

Troubleshooting

Mount Failed After Reboot

# Check fstab syntax
sudo findmnt --verify

# Check system logs
journalctl -b | grep mount

Permission Issues

# Set ownership
sudo chown -R $USER:$USER /mnt/data

# Or set permissions
sudo chmod 755 /mnt/data