Basic Physical Volume Management

Question 1

What are Physical Volumes (PVs) in LVM?

Answer 1

Foundational components in Logical Volume Management

Question 2

What must be done before including PVs in Volume Groups (VGs)?

Answer 2

PVs must be initialized

Question 3

Name key commands for PV management.

Answer 3

pvcreate, pvdisplay, pvs, pvscan

Question 4

What does pvcreate do?

Answer 4

Initializes a raw storage device or partition as a Physical Volume

Question 5

Syntax for pvcreate?

Answer 5

pvcreate /dev/<device></device>

Question 6

Example of pvcreate?

Answer 6

pvcreate /dev/sdb

Question 7

What does pvdisplay show?

Answer 7

Detailed information about a specific Physical Volume

Question 8

Syntax for pvdisplay?

Answer 8

pvdisplay /dev/<device></device>

Question 9

Example details from pvdisplay?

Answer 9

PV Name: /dev/sdb ,
VG Name: <not>
PV Size : 100.00 GiB
Allocatable: yes
PE Size : 4.00 MiB
Total PE : 25599
Free PE: 25599
Allocated PE: 0
PV UUID : JZ9h3D-Ty8N-M3qX-27Lg-K6N8-xb2N-LMZ7G5</not>

Question 10

What does pvs command do?

Answer 10

Displays a summarized table of all Physical Volumes

Question 11

Syntax for pvs?

Answer 11

pvs

Question 12

Example output of pvs?

Answer 12

PV, VG, Fmt, Attr, PSize, Pfree

/dev/sda1 vg01 lvm2 a– 200.00G 50.00G

Question 13

What does pvscan do?

Answer 13

Scans all available disks for Physical Volumes

Question 14

Syntax for pvscan?

Answer 14

pvscan

Question 15

Example output of pvscan?

Answer 15

Lists PVs, VG assignment, size, free space, and totals

PV /dev/sda1 VG vg01 lvm2 [200.00 GiB / 50.00 GiB free]

Question 16

Why is pvscan useful?

Answer 16

Confirms system recognition of all PVs, especially after adding new storage