Question

Users report that a web application on a Linux server can no longer write files, and application logs show 'Read-only file system' errors. The affected data resides on /dev/sdb1 mounted at /var/www/data. The kernel remounted the filesystem read-only after detecting errors. After confirming the underlying disk is healthy with SMART data, what is the correct sequence to restore normal read-write operation?

Accepted Answer

Unmount /var/www/data, run fsck on /dev/sdb1 to repair the filesystem, then remount it read-write

Answer

Immediately run 'mount -o remount,rw /var/www/data' without unmounting or checking the filesystem

Answer

Edit /etc/fstab to change the mount option to 'rw' and reboot the server

Answer

Delete and recreate the /dev/sdb1 partition with fdisk, then mkfs a new filesystem