La commande 'exportvg' vous permet de retirer la définition d'un groupe de volume dans la base ODM du système AIX.
Cela ne détruit en aucun cas les données contenues dans ce VG.
On peut utiliser la commande 'exportvg' dans les cas suivant :
- Désynchronisation de la définition d'un VG par rapport à des modifications effectuées depuis un autre serveur.(Pour refaire un 'importvg' ensuite)
- Le VG n'est plus utilisé et le disque va être "décroché" de ce système, puis réutiliser sur un autre serveur par un 'importvg'
La syntaxe de la commande 'exportvg' est : 'exportvg nom_vg'
Pour vérifier que le VG est bien exporté, lancer la commande 'lsvg', celui-ci ne doit pas apparaître.
Bien sûr, le VG DOIT être fermé avant de lancer cette commande(varyoffvg nom_vg).
Purpose
Exports the definition of a volume group from a set of physical volumes.
Syntax
exportvg VolumeGroup
Description
The exportvg command removes the definition of the volume group specified by the VolumeGroup parameter from the system. Since all
system knowledge of the volume group and its contents are removed, an exported volume group can no longer be accessed. The exportvg
command does not modify any user data in the volume group.
A volume group is a nonshared resource within the system; it should not be accessed by another processor until it has been explicitly
exported from its current processor and imported on another. The primary use of the exportvg command, coupled with the importvg
command, is to allow portable volumes to be exchanged between processors. Only a complete volume group can be exported, not individual
physical volumes.
Using the exportvg command and the importvg command, you can also switch ownership of data on physical volumes shared between two
processors.
Note: To use this command, you must either have root user authority or be a member of the system group.
You can use the Volumes application in Web-based System Manager (wsm) to change volume characteristics.
You can use the Web-based System Manager Volumes application (wsm lvm fast path) to run this command. You could also use the System
Management Interface Tool (SMIT) smit exportvg fast path to run this command.
Notes:
1 A volume group that has a paging space volume on it cannot be exported while the paging space is active. Before exporting a
volume group with an active paging space volume, ensure that the paging space is not activated automatically at system
initialization, and then reboot the system.
2 The mount point information of a logical volume would be missing from the LVCB (logical volume control block) if it is longer
than 128 characters. Please make a note of the mount points that are longer than 128 characters as you will need to edit the
/etc/filesystems file manually upon executing importvg command to import this volume group completely.
