A btrfs filesystem has a corrupted extent tree. The admin has already tried btrfs check and it reported errors. The filesystem is mounted read-write. What is the safest next step?

Run btrfs check --repair /dev/sdb1 while mounted.

Run btrfs scrub start /dev/sdb1 to repair the extent tree.

Run btrfs balance start /dev/sdb1 to fix the corruption.

Unmount the filesystem, then run btrfs check --repair /dev/sdb1.

An XFS filesystem on /dev/sda1 is reporting corruption and the admin needs to run xfs_repair. The filesystem is currently mounted. What is the correct first step?

Run fsck -t xfs /dev/sda1 while mounted.

Run xfs_repair -L /dev/sda1 while mounted to clear the log.

Unmount /dev/sda1, then run xfs_repair /dev/sda1.

Run xfs_repair -n /dev/sda1 to check without modifying.

What is a recommended practice before running fsck on a filesystem?

Run fsck from within a running system on the root filesystem

Remount the filesystem read-write

Delete all files on the filesystem

What is a limitation of xfs_repair?

It cannot repair metadata corruption

It only works on ext4 filesystems

It cannot repair a mounted filesystem

It cannot repair filesystems larger than 2 TB

LPI LPIC-2:Linux Engineer (201-450)

Domain 4Objective 2

203.2 Maintaining a Linux Filesystem (weight: 3) LPIC-2 Practice Questions (Page 3)

Part of the Topic 203: Filesystem and Devices domain, which makes up ~10% of our current practice bank. Linux Professional Institute does not publish an official question count, but from its 90-minute exam (~35–60 total, ~4–6 in this domain), expect 1–2 from this objective — we provide 36 practice questions to prepare you well beyond it. (estimate)

36questions here

8free pages

13concepts

13 Concepts in This Objective

Filesystem maintenance overview
Checking filesystem integrity with fsck
Understanding filesystem states and dirty flags
Forcing filesystem checks
Using tune2fs to adjust filesystem parameters
Using dumpe2fs to display filesystem information
Using debugfs for interactive filesystem debugging
Checking and repairing XFS filesystems
Checking and repairing btrfs filesystems
Monitoring filesystem health and errors
Managing filesystem journaling
Handling filesystem full and inode exhaustion
Performing filesystem maintenance safely

Questions 11–15

11expert · hard
A btrfs filesystem has a corrupted extent tree. The admin has already tried btrfs check and it reported errors. The filesystem is mounted read-write. What is the safest next step?
Select an answer first
12application · medium
An XFS filesystem on /dev/sda1 is reporting corruption and the admin needs to run xfs_repair. The filesystem is currently mounted. What is the correct first step?
Select an answer first
13foundation · easy
Which command modifies the reserved block percentage on an ext4 filesystem?
Select an answer first
14foundation · easy
What is a recommended practice before running fsck on a filesystem?
Select an answer first
15foundation · easy
What is a limitation of xfs_repair?
Select an answer first

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