2.3. Creating LVM physical volume

Procédure

1. Create multiple physical volumes by using the space-delimited device names as arguments to the pvcreate command:

   # pvcreate /dev/vdb1 /dev/vdb2 /dev/vdb3
     Physical volume "/dev/vdb1" successfully created.
     Physical volume "/dev/vdb2" successfully created.
     Physical volume "/dev/vdb3" successfully created.

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   This places a label on /dev/vdb1, /dev/vdb2, and /dev/vdb3, marking them as physical volumes belonging to LVM.

2. View the created physical volumes by using any one of the following commands as per your requirement:

   1. The pvdisplay command, which provides a verbose multi-line output for each physical volume. It displays physical properties, such as size, extents, volume group, and other options in a fixed format:

      # pvdisplay
      --- NEW Physical volume ---
        PV Name               /dev/vdb1
        VG Name
        PV Size               1.00 GiB
      [..]
      --- NEW Physical volume ---
        PV Name               /dev/vdb2
        VG Name
        PV Size               1.00 GiB
      [..]
      --- NEW Physical volume ---
        PV Name               /dev/vdb3
        VG Name
        PV Size               1.00 GiB
      [..]

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   2. The pvs command provides physical volume information in a configurable form, displaying one line per physical volume:

      # pvs
        PV         VG  Fmt    Attr    PSize      PFree
      /dev/vdb1        lvm2           1020.00m   0
      /dev/vdb2        lvm2           1020.00m   0
      /dev/vdb3        lvm2           1020.00m   0

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   3. The pvscan command scans all supported LVM block devices in the system for physical volumes. You can define a filter in the lvm.conf file so that this command avoids scanning specific physical volumes:

      # pvscan
        PV  /dev/vdb1                      lvm2 [1.00 GiB]
        PV  /dev/vdb2                      lvm2 [1.00 GiB]
        PV  /dev/vdb3                      lvm2 [1.00 GiB]

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