LFCS · Question #815
What can the Logical Volume Manager (LVM) be used for? (Choose THREE correct answers.)
The correct answer is B. To dynamically change the size of logical volumes. D. To create snapshots. E. To dynamically create or delete logical volumes. LVM allows for flexible and dynamic management of storage, enabling administrators to resize, create, delete, and snapshot logical volumes.
Question
Options
- ATo create RAID 9 arrays.
- BTo dynamically change the size of logical volumes.
- CTo encrypt logical volumes.
- DTo create snapshots.
- ETo dynamically create or delete logical volumes.
How the community answered
(49 responses)- A6% (3)
- B92% (45)
- C2% (1)
Why each option
LVM allows for flexible and dynamic management of storage, enabling administrators to resize, create, delete, and snapshot logical volumes.
LVM is not used to create RAID arrays; RAID functionality is typically handled by `mdadm` for software RAID or by hardware RAID controllers, and RAID 9 is not a standard RAID level.
One of the primary benefits of LVM is its ability to dynamically change the size of logical volumes, allowing for online resizing (extending or shrinking) as storage needs evolve without affecting running applications.
LVM itself does not encrypt logical volumes; encryption is typically handled by separate technologies like LUKS (Linux Unified Key Setup) which can be applied to LVM logical volumes.
LVM supports the creation of snapshots, which are point-in-time copies of a logical volume, useful for backups or testing without affecting the original data.
LVM provides the flexibility to dynamically create or delete logical volumes from a volume group, making storage allocation and deallocation highly adaptable to changing requirements.
Concept tested: LVM core functionalities
Source: https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/managing_storage_devices/what-is-lvm_managing-storage-devices
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