EROFS - Read-only file system

root@linuxfix:~/erofs$

EROFS

Read-only file system

Solutions

Prerequisites: Start by updating your system to resolve common issues and ensure the solutions provided below are compatible with your current environment.

check_latest_version && sudo apt update && sudo apt upgrade -y

Check mount status

Verify filesystem mount options:

mount | grep /path

cat /proc/mounts | grep /dev/device

findmnt /path

Remount as read-write

Change to read-write mode:

sudo mount -o remount,rw /path

sudo mount -o rw,remount /dev/device /path

Check filesystem health

Verify filesystem integrity:

sudo fsck /dev/device

dmesg | grep -i "read-only"

sudo tune2fs -l /dev/device

What is EROFS?

EROFS occurs when trying to write to a filesystem that is mounted read-only.

Common scenarios: Writing to read-only mounts, filesystem errors causing read-only mode, or USB drives with write protection.

Common Causes

Filesystem mounted read-only
Write protection enabled
Filesystem errors triggering read-only mode
Hardware write protection
Mount options preventing writes

Debugging Tips

lsblk -f

cat /sys/block/device/ro

hdparm -r /dev/device

blkid /dev/device

Prevention

Monitor filesystem health
Use proper mount options
Check hardware write protection
Regular filesystem checks

Additional Resources

Linux Mount Options

Understanding filesystem mount options

errno filesystem mount readonly