FAQ

The disk has been changed to Read Only on Red Hat Enterprise Linux (or CentOS / Ubuntu). How should I take actions?

(:Last updated)

If a problem (such as an "I/O" error) occurs during a disk access to a device, the file system of a device mounted in a specific directory might be forced tot be remounted with Read Only because it is determined that a problem has occurred with the file system of the device.In this case, you can remount the file system of the device mounted in a specific directory with Read Write according to below steps.

1.Check the file system of the device mounted with Read Only (in the example below, you can confirm that  "/dev/vdb" is mounted with Read Only)
# mount -l 
/dev/mapper/rhel-root on / type xfs (rw,relatime,attr2,inode64,noquota)
/dev/mapper/rhel-var on /var type xfs (rw,relatime,attr2,inode64,noquota)
/dev/vda1 on /boot types xfs (rw,relatime,attr2,inode64,noquota)
/dev/vdb on /mnt types xfs (ro,relatime,attr2,inode64,noquota) ※ ro = read only
2.Remount the file system of the device with Read Write (In the example below, "/dev/vdb" has been remounted with Read Write)
# mount -o remount,rw /dev/vdb
# mount -l 
/dev/mapper/rhel-root on / type xfs (rw,relatime,attr2,inode64,noquota)
/dev/mapper/rhel-var on /var type xfs (rw,relatime,attr2,inode64,noquota)
/dev/vda1 on /boot types xfs (rw,relatime,attr2,inode64,noquota)
/dev/vdb on /mnt types xfs (rw,relatime,attr2,inode64,noquota) ※ rw = read write

 

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