RHCE Storage and File Systems 2

Question 1

Which command creates a volume group named `vg_data` from physical volume `/dev/sdb`?

Accepted Answer

vgcreate vg_data /dev/sdb

Answer

`vgcreate` creates a new LVM volume group from one or more physical volumes.

Question 2

What mount option in `/etc/fstab` causes a file system to be mounted read-only?

Accepted Answer

ro

Answer

The `ro` mount option mounts the file system in read-only mode, preventing any write operations.

Question 3

Which command scans for available LVM physical volumes on the system?

Accepted Answer

pvscan

Answer

`pvscan` scans all supported LVM block devices in the system for physical volumes.

Question 4

What does the `blkid` command display?

Accepted Answer

UUID and type of block devices

Answer

`blkid` locates and prints block device attributes including UUID, label, and file system type.

Question 5

Which option in `mkfs.xfs` sets a label for a new XFS file system?

Accepted Answer

-L

Answer

The `-L` option in `mkfs.xfs` sets a label (name) for the newly created XFS file system.

RHCE - Red Hat Certified Engineer Practice Test