Which command sequence creates a new LVM physical volume on /dev/sdb1 and then creates a volume group named vg_data using that PV?

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Multiple Choice

Which command sequence creates a new LVM physical volume on /dev/sdb1 and then creates a volume group named vg_data using that PV?

Explanation:
Initializing the device as a physical volume is the essential first step. pvcreate /dev/sdb1 marks that disk or partition as a physical volume that LVM can manage. Without doing this, the device cannot participate in any volume group. Once the PV is prepared, you create a new volume group that uses that PV with vgcreate vg_data /dev/sdb1. This defines a brand-new VG named vg_data and attaches the initialized PV to it, making the space available for logical volumes. The order is important: you can’t form a new VG from an uninitialized PV, so pvcreate must come first. Using vgextend would only add a PV to an existing VG, not create a new one, and vgchange merely activates or deactivates an existing VG rather than creating it.

Initializing the device as a physical volume is the essential first step. pvcreate /dev/sdb1 marks that disk or partition as a physical volume that LVM can manage. Without doing this, the device cannot participate in any volume group.

Once the PV is prepared, you create a new volume group that uses that PV with vgcreate vg_data /dev/sdb1. This defines a brand-new VG named vg_data and attaches the initialized PV to it, making the space available for logical volumes.

The order is important: you can’t form a new VG from an uninitialized PV, so pvcreate must come first. Using vgextend would only add a PV to an existing VG, not create a new one, and vgchange merely activates or deactivates an existing VG rather than creating it.

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