Chapitre 10. Limiting LVM device visibility and usage

• Add devices by including their names to the devices file:

  $ lvmdevices --adddev <device_name>

• Add all devices in a Volume Group (VG) to the devices file:

  $ vgimportdevices <vg_name>

• Add all devices in all visible VGs to the devices file:

  $ vgimportdevices --all

• Use the pvcreate command to initialize a new device:

  $ pvcreate <device_name>

  • This action automatically adds the new Physical Volume (PV) to the system.devices file.

• Initialize new devices and add the new device arguments to the devices file automatically:

  $ vgcreate <vg_name> <device_names>

  • Replace <vg_name> with the name of the VG, from which you want to add devices.
  • Replace <device_names> with a space-separated list of the devices you want to add.

• Use the vgextend command to initialize new devices:

  $ vgextend <vg_name> <device_names>

  • Replace <vg_name> with the name of the VG, from which you want to add devices.
  • Replace <device_names> with the names of the devices you want to add.
  • This adds the new device arguments to the devices file automatically.

• Display the system.devices file, to check the list of devices:

  $ cat /etc/lvm/devices/system.devices

• Update the system.devices file to match most recent device information:

  $ lvmdevices --update

Procédure

• Remove a device by using one of the following methods depending on the information you have about that device:

  • Remove a device by name:

    $ lvmdevices --deldev <device_name>

  • Remove a device by the Physical Volume ID (PVID) of the device:

    $ lvmdevices --delpvid <PV_UUID>

• Display the system.devices file to verify, that the deleted device no longer present:

  $ cat /etc/lvm/devices/system.devices

• Update the system.devices file to match most recent device information:

  $ lvmdevices --update

Procédure

• Specify an empty devices file:

  $ lvmdevices --devicesfile ""