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Regenerating persistent device names

The persistent device naming feature makes the names of disk devices persistent across system reboots. If operating system-based naming is selected, each disk name is usually set to the name of one of the paths to the disk. After hardware reconfiguration and a subsequent reboot, the operating system may generate different names for the paths to the disks. As DDL assigns persistent disk names using the persistent device name database that was generated during a previous boot session, the disk names may no longer correspond to the actual paths. This does not prevent the disks from being used, but the association between the disk name and one of its paths is lost.

 To regenerate persistent device names

  1. Use either of the following commands to find the relationship between a disk and its paths:

    # vxdmpadm getsubpaths dmpnodename=disk_access_name

    # vxdisk list disk_access_name

  2. Remove the file that contains the existing persistent device name database:

    # rm /etc/vx/

  3. Restart the VxVM configuration demon:

    # vxconfigd -k

    This regenerates the persistent name database. The disk names now correspond to the new path names.