Updating fstab Entries to Use UUIDs

Update fstab entries to use UUIDs, as follows:

1. Log in as root user.
2. Run the following command to query all types of mounted file systems and device UUIDs:

blkid

Sample output:

/dev/sda2: UUID="4eb40294-4c6f-4384-bbb6-b8795bbb1130" TYPE="xfs"

/dev/sda1: UUID="2de37c6b-2648-43b4-a4f5-40162154e135" TYPE="swap"

3. Run the following command to open fstab file:

# cat /etc/fstab

Sample output: /dev/sda2  /       xfs     defaults    0 0

4. Check the disk identifier in the fstab file, and then review the following:

• If the disk identifier is UUID like the following example, no further action is required:

UUID=a1228fd4-9288-4db2-8fd0-69dab79ccfda   /          xfs     defaults        0 0

• If the disk identifier is the device name like the following example, go to Step 5, below:

/dev/sda2    /       xfs     defaults    0 0

5. Run the following command to open the fstab file in the vi editor (note that you can use another text editor, if you want) :

vi /etc/fstab

6. Press i to enter editing mode, and then change the disk identifier to UUID., as follows:

UUID=a1228fd4-9288-4db2-8fd0-69dab79ccfda    /        xfs     defaults        0 0

7. Press ESC, enter :wq, and then press ENTER. The system saves the configuration and then exits the vi editor.

Note: If your system uses device names from the grub configuration, see "Upgrading a grub/grub2 Configuration for EFI Hosts to Use UUID Disk Identifiers". (https://kb.commvault.com/article/77906)