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Question 316 - XK0-005 discussion

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A systems administrator receives the following errors via email from the system log:

go

XFS (loop0): Metadata CRC error detected at xfs_agi_read_verify+0xcb/0xfe

XFS (loop0): First 128 bytes of corrupted metadata buffer

XFS (loop0): metadata I/O error in 'xfs_trans_read_buf_map' at daddr 0x2 len 1 error 74

A few minutes later, the administrator starts receiving reports that some of the images in the company's website are not loading properly. The systems administrator runs some commands and receives the following outputs:

css

Output 1

NAME FSTYPE UUID MOUNTPOINT

sda ext4 02ae47-fe457-45bc /

sdb xfs 347c7056 /var/www/html

Output 2

DocumentRoot '/var/www/html'

Output 3

httpd.service - The Apache HTTP Server

Loaded: loaded (/usr/lib/systemd/system/httpd.service; enabled; vendor preset: disabled)

Active: active (running) since Sun 1991-05-24 16:12:43 UTC; 30y ago

Main PID: 252 (httpd)

Which of the following would be the appropriate steps to take to solve this issue?

A.

systemctl stop httpd umount /dev/sdb1 xfs_repair /dev/sdb1 mount /dev/sdb1 /var/www/html systemctl start httpd

Answers
A.

systemctl stop httpd umount /dev/sdb1 xfs_repair /dev/sdb1 mount /dev/sdb1 /var/www/html systemctl start httpd

B.

umount /dev/sdb1 xfs_repair /dev/sdb1 xfs_metadump /dev/sdb1 mount /dev/sdb1 /var/www/html systemctl restart httpd

Answers
B.

umount /dev/sdb1 xfs_repair /dev/sdb1 xfs_metadump /dev/sdb1 mount /dev/sdb1 /var/www/html systemctl restart httpd

C.

umount /dev/sdb1 systemctl stop httpd xfs_metadump /dev/sdb1 mount /dev/sdb1 /var/www/html systemctl start httpd

Answers
C.

umount /dev/sdb1 systemctl stop httpd xfs_metadump /dev/sdb1 mount /dev/sdb1 /var/www/html systemctl start httpd

D.

systemctl stop httpd xfs_check -L /dev/sdb umount /var/www/html systemctl start httpd

Answers
D.

systemctl stop httpd xfs_check -L /dev/sdb umount /var/www/html systemctl start httpd

Suggested answer: A

Explanation:

The error is related to XFS filesystem corruption on /dev/sdb1, where the website's images are stored. By stopping the Apache service, unmounting the filesystem, running xfs_repair, and remounting, the filesystem can be repaired, and the service can be restarted safely.

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asked 09/10/2024
Khaled Fouad
33 questions
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