Linux+ Logical Volume Management (LVM) Flashcards

Which lvcreate option specifies the number of stripes when creating a striped logical volume?

Answer: -i

The -i (or --stripes) option in lvcreate defines how many physical volumes the striped LV will spread data across.

After extending a logical volume with lvextend, what additional step is required for an XFS filesystem?

Answer: Run 'xfs_growfs /mountpoint' while mounted

xfs_growfs must be run on the mounted XFS filesystem path to expand the filesystem to fill the enlarged LV.

What does the '--merge' option do in the 'lvconvert' command?

Answer: Merges a snapshot back into its origin volume

lvconvert --merge schedules a snapshot to be merged back into its origin LV on the next activation or reboot.

Which command renames a volume group from 'vg_old' to 'vg_new'?

Answer: vgrename vg_old vg_new

vgrename takes the old VG name (or UUID) and the new name as arguments to rename a volume group.

A thin pool has data_percent at 95% and metadata_percent at 10%. Which threshold requires immediate action?

Answer: data_percent at 95% requires immediate expansion

Data pool exhaustion at 95% is critical and requires immediate expansion since writes will fail when it reaches 100%.

Which command exports a volume group so it can be imported on a different system?

Answer: vgexport vg0

vgexport marks a VG as exported and deactivates it, making it safe to move disks to another system for vgimport.

What is the effect of setting the 'skip_activation' flag on a logical volume?

Answer: The LV will not be activated automatically during system boot

The skip_activation flag prevents a logical volume from being automatically activated when the volume group is activated.