/dev/vdb1 /var/backup xfs noatime,uquota,pquota 0 0
Remount the file system /var/backup and check, if the quotas have /var/backup has the desired values:
xfs_quota -x -c state /var/backup
As you can see (items marked bold), we have achieved our goal:
User quota state on /var/backup (/dev/vdb1)
Accounting: '''ON'''
Enforcement: '''ON'''
Inode: #131 (3 blocks, 2 extents)
Group quota state on /var/backup (/dev/vdb1)
Inode: #809717 (1 blocks, 1 extents)
Project quota state on /var/backup (/dev/vdb1)
Accounting: '''ON''' Enforcement: '''ON'''
Inode: #809717 (1 blocks, 1 extents)
Blocks grace time: [7 days 00:00:30]